Testing And Adjusting Of The Woodward 3161 Governors On The Fuel Injection Test Bench{1264} Caterpillar

Generator Set Engines:

3508 (S/N: 23Z1-UP; 70Z1-UP)

3512 (S/N: 24Z1-UP; 67Z1-UP)

3516 (S/N: 25Z1-UP; 73Z1-UP; 5SJ1-UP; 4XF1-UP)

Industrial Engines:

3508 (S/N: 95Y1-UP; 68Z1-UP)

3512 (S/N: 49Y1-UP; 65Z1-UP)

3516 (S/N: 27Z1-UP; 71Z1-UP)

Marine Engines:

3508 (S/N: 96Y1-UP; 69Z1-UP)

3512 (S/N: 50Y1-UP; 66Z1-UP)

3516 (S/N: 4MJ1-UP; 29Z1-UP; 72Z1-UP)

Vehicular Engines:

3508 (S/N: 97Y1-UP)

3512 (S/N: 51Y1-UP)

3516 (S/N: 28Z1-UP)

Off-Highway Tractor:

776B (PIN: 6JC1-UP)

Off-Highway Truck:

777B (PIN: 4YC1-UP)

785 (PIN: 8GB1-UP)

789 (PIN: 9ZC1-UP)

793 (PIN: 3SJ1-UP)

Track-Type Tractor:

D11N (PIN: 74Z1-UP)

Wheel Loader:

994 (PIN: 9YF1-UP)

Introduction

The information in this instruction is for the on-fuel injection test bench adjustment of a 3161 Governor for the 3500 Family of Engines.

This instruction is NOT written as a troubleshooting guide. This instruction is used in order to check a 3161 governor on a fuel injection test bench. This instruction is also used in order to adjust the governor to the original Woodward specifications.

For commercial governors, the original Woodward specifications may not match the specifications for the engine's application.

The High Idle, Low Idle and the Pneumatic Speed Control (PSC) must be set to the engine specifications with the governor on the engine for commercial governors. When the engine's specifications are known, the governor's specifications can be calculated. The governor settings can be made while the governor is on the fuel injection test bench.

The commercial engines have two engine to governor speed ratios. (Engine speed rpm × ratio = governor speed).

• The ratio for both the high speed engines and the mid-speed engines is 0.7619.

• The ratio for low speed engines (1200 rpm and lower) is 1.143.

• The ratio for the engine on the 994 Wheel Loader is 0.7807.

The 3161 Governor Test, NEHS0545 lists only the rpm for the Mid-speed engines and the High speed engines. The governor speed to drive speed ratio is identical for Low speed, High speed, and Mid-speed applications.

The specific tools that are required for the adjustment procedure are listed in Table 1.

This entire Special Instruction should be read and understood before beginning work on the governor.

Reference: Consult the 3161 Governor Test, NEHS0545 and the Tooling To Allow Bench Testing And Adjusting Of The Woodward 3161, NEHG3611 for additional information.

Required Tools

Table 1

Required Tools
Part Number	Description
4C-8980	Governor Test and Adjust Tool Group
4C-6907	Governor Test Bench Drive Group
4C-8740	Air Supply and Test Tool Group
4C-6100	Torque Control Tool Group
4C-9054	Battery Charger (110 Volt 60 Hz)
4C-9055	Battery Charger (230 Volt 50 Hz)
6V-3075	Dial Indicator
6V-2057	Contact
1U-7308	Shim Adjustment Tool
2A-4781	Bolt
4B-5269	Washer

Setting Up The Test Bench

Illustration 1	g00370861

1. Position the 4C-6907 Governor Test Bench Drive Group (1) on the mounting rails. Loosely install the 6V-6103 Clamp Screw Assembly (3) and the 6V-9138 Clamp (4) .

2. Connect the lube oil's supply line (2). See the Illustration.

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Illustration 2	g00370864

3. Install the 6V-6099 Shield (6) .

4. Engage the drive shaft with the coupling on the test bench. Tighten the coupling's jaws.

5. Tighten the 6V-6103 Clamp Screw Assembly (3) .

6. Install four 3P-0647 O-Ring Seals (5) .

Installation Of The Governor

1. Plug the Fuel Air Ratio Control (FARC), the Pneumatic Speed Control (PSC), and, if equipped, the Pressure Shutdown ports.

2. Determine the type of oil that is used in the governor. If the governor is not a self-contained governor, the oil will be engine oil from the engine which is being regulated. Self-contained governors use 136-9642 Governor Oil .

   If the type of oil can not be determined, remove the oil fill/drain plug. Turn the governor upside-down. Then drain the oil. The governor's drive shaft should be rotated in order to drain the oil from the oil pump.

   Do not refill the governor at this time. Replace the oil fill/drain plug prior to cleaning the governor.

3. Clean the governor. A high pressure wash is recommended in order to clean the governor.

4. Determine the governor's drive shaft rotation. Set the rotation of the test bench in order to drive the governor's drive shaft in the proper direction.

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Illustration 3	g00370935

5. Install the governor on the 4C-6907 Governor Test Bench Drive Group (1). Ensure that the governor nameplate is facing the right side of the test bench. Ensure that the governor drive shaft engages properly in the drive coupling. Do not force the governor on the coupling. Damage to the drive shaft, the coupling, and the governor may occur.

6. Install the four 0L-2070 Bolts (7) that hold the governor to the drive.

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NOTICE
Tighten the governor to the base by initially tightening each bolt moderately to the seat of the governor. Tighten each bolt to the standard torque of 43.5 N·m (32.08 lb ft). This procedure will maintain the integrity of the base gasket and vertical alignment of the governor.

7. For governors that are not self-contained, remove the oil fill/drain plug. The oil level in the governor should be at least 25.4 mm (1.00 inch) from the top cover of the governor. The oil should be compatible with the existing oil in the governor. If the oil was drained, fill the governor with SAE 30 oil.

   Verify the oil level in the self-contained governors. Add 136-9642 Governor Oil if it is necessary.

Checking The Governor

1. Start the lube system on the test bench. The lube oil pressure should be set to 300 kPa (43.51 psi). On the Hartridge bench, adjust the test bench's oil pressure to 0 kPa (0 psi).

2. Start the main drive in the previously determined direction.

3. Slowly increase drive speed to 300 rpm. Check for the proper alignment and operation of the bench.

4. Reduce the drive speed to 0 rpm. Stop the main drive.

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Illustration 4	g00370992

5. Connect the air supply to the air supply port on the 4C-8740 Air Supply and Test Tool Group (8) .

6. Connect the FARC inlet to the regulated air port (A) on the 4C-8740 Air Supply and Test Tool Group (8) .

   Check the FARC leakdown by pressurizing the FARC to 75 kPa (10.9 psi). Then close the valve. The FARC should not lose more than 7 kPa (1.0 psi) over a one minute period.

   If the FARC fails the leakdown, the FARC diaphragm, the lower governor seal, and the sealing washer or gaskets will need to be repaired. Do not repair the governor at this time.

   Increase air flow in order to maintain 150 kPa (21.8 psi) at the FARC inlet. If 150 kPa (21.8 psi) can not be maintained, remove the FARC setting plug. Move the FARC by turning the FARC setting screw counterclockwise. Refer to ""FARC Level Adjustment Procedure" ".

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Illustration 5	g00371033

7. Install the 4C-6099 Torque Arm / 4C-6101 Torque Arm (10) and the 4C-6103 Weight Assembly (11) on right side of the terminal shaft when you are facing the governor nameplate.

   The terminal shaft torque arm must point toward the right when you are facing the end of the test bench. The torque arm must be within ± 30 degrees of horizontal when the torque arm is installed. The torque arm should be turned clockwise. This is the Full Fuel Off position.

   Install the 4C-6098 Torque Arm (Speeder Shaft) (9) on the governor's speeder shaft. The speeder shaft torque arm should be horizontal. The speeder shaft torque arm should extend to the RIGHT when you are facing the governor nameplate.

8. Once the FARC is moved, start the main drive. Increase the drive speed to 220 ± 5 rpm. Move the speeder shaft clockwise against the high idle stop screw. The governor's terminal shaft should be able to lift the weight. The terminal shaft should move to the Full Fuel On position.

   If the terminal shaft does not move to the Full Fuel On position, remove all of the shutdown devices. Refer to the ""Adjustment Of The Shutdown Rod" ". Complete Step 1, Step 2 and Step 3, and recheck.

   If the terminal shaft will not move to the Full Fuel On position, the governor has internal problems such as a faulty oil pump, a faulty relief valve, or an internal leakage that must be corrected. Further testing is not needed.

9. Install the 2F-7112 Thermometer in the oil fill/drain hole. Increase the drive speed to 2600 rpm. Allow the governor to operate until the governor's oil temperature reaches 54°C (129.2°F). The oil will reach the correct temperature in approximately 45 minutes.

10. Once the governor oil is at 54°C (129.2°F) and the FARC is moved, decrease the drive speed to 220 ± 5 rpm. Move the speeder shaft clockwise against the high idle stop screw. The governor's terminal shaft should be able to lift the weight. The terminal shaft should move to the Full Fuel On position.

    If the terminal shaft does not move to the Full Fuel On position, remove all of the shutdown devices. Refer to the ""Adjustment Of The Shutdown Rod" ". Complete Step 1, Step 2 and Step 3, and recheck.

11. If the terminal shaft will not move to the Full Fuel On position, the governor has internal problems such as a faulty oil pump, a faulty relief valve, or an internal leakage that must be corrected. Further testing is not needed.

12. Adjust the drive speed to 0 rpm. Turn off the main drive.

13. Remove the terminal shaft torque arm and weight.

Preparing The Governor For Testing

Illustration 6	g00371052

1. Engage the governor rig pin (12) .

2. Install the 4C-6099 Torque Arm / 4C-6101 Torque Arm (10) and the 4C-6103 Weight Assembly (11) on right side of the terminal shaft when you are facing the governor nameplate.

   The terminal shaft torque arm must point toward the LEFT when you are facing the end of the test stand. The torque arm must be within ± 30 degrees of horizontal when the torque arm is installed. The torque arm should be turned counterclockwise. This will put the terminal shaft against the rig pin.

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Illustration 7	g00371056

3. Use the two 4S-5565 Bolts in order to install the 4C-8978 Indicator Bracket (14) on left side of governor.

4. Install the 140-1016 Digital Indicator (13) on the dial indicator bracket (14). Tighten the screw.

   Note: The digital indicator group (13) may be rotated in order to face any direction prior to tightening the indicator bracket's screw.

5. Install the 4C-8981 Terminal Lever Assembly (16) on the terminal shaft. Ensure that the ball is centered under the indicator. Place the 4C-8984 Parallel Gauge (15) between the top surface of the terminal lever and the bottom surface of the dial indicator bracket.

   Spread the parallel gauge until the terminal lever is held parallel to the indicator bracket. Tighten the clamping screw on the terminal lever.

6. Remove the parallel gauge.

7. Remove the terminal shaft torque arm and weight.

8. Start the main drive on the test stand. Set the drive speed to 1000 ± 20 rpm.

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Illustration 8	g00371093

9. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the RIGHT when you are facing the governor nameplate.

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the torque arm is installed. The torque arm should be turned clockwise. This will bring the terminal shaft against the governor rig pin.

10. Ensure that the governor is at 54°C (129.2°F). Activate the indicator. Set the indicator to show millimeters. Zero the indicator. Refer to the 3161 Governor Test, NEHS0545.

11. Remove 4C-6102 Weight Assembly (17) from the speeder shaft torque arm. Disengage the governor rig pin.

    The governor is now ready for further testing.

Performance Checks For The Governor

• All data will be taken from the Governor Test Specifications Chart in the Special Instruction, SEHS9351.

• The column numbers that are called out in the following procedures will refer to the row only for the governor that is being tested.

When you are reading the terminal shaft angle, set the drive speed. Pull the manual shutdown lever or push the shutdown rod until terminal shaft moves to the Fuel Off position. Then release the lever or the rod. When the terminal shaft stabilizes, read the terminal shaft angle.

Note: All of the checks must be done while the governor is warmed to 54°C (129.2°F).

Checking The Shutdown Devices

1. Pressurize or manually move the FARC.

2. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the RIGHT when you are facing the governor nameplate. The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The torque arm should be turned clockwise.

3. Set drive speed to "Col 4".

4. Activate each shutdown device in order to verify that the terminal shaft will shut off when each device is activated.

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Illustration 9	g00368994
(18) Manual Shutdown Device. (19) Electric Shutdown Device.

5. Pull the manual shutdown lever in order to activate the shutdown device.

6. Connect the 4C-8979 Test Lead Tool Group to both the electric shutdown solenoid and the +24 VDC power supply on the test bench. Push the switch on the "test lead" group in order to activate.

7. Connect the pressure shutdown device to the regulated air port "C" on the 4C-8740 Air Supply and Test Tool Group (8). Pressurize the pressure shutdown device in order to activate the device.

   If the activated shutdown devices do not shut down the governor, remove all of the shutdown devices from the governor. Refer to the ""Adjustment Of The Shutdown Rod" " procedure. Complete Step 1, Step 2 and Step 3, and recheck.

8. Push down on the shutdown rod. If the governor shuts down, the shutdown rod nut must be adjusted. Refer to the ""Adjustment Of The Shutdown Rod" " procedure.

   If the shutdown rod does not shut down the governor, the governor has internal problems. No further testing is needed.

High Idle

Illustration 10	g00451017
(21) Low Idle Stop Screw. (QQ) Stop Lever. (X) Speeder Shaft. (RR) Name Plate. (R) Terminal Shaft. (SS) Stop Screw Cover. (20) High Idle Stop Screw. (12) Rig Pin. (39) Compensation Needle Valve.

1. Pressurize or manually move the FARC.

2. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the RIGHT when you are facing the governor nameplate. The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The torque arm should be turned clockwise.

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Illustration 11	g00368984

3. Adjust the drive speed to "Col 2". The terminal shaft angle should read "Col 1" ± .5 degrees. Adjust the high idle stop screw (20) in order to obtain a terminal shaft reading of "Col 1" ± .5 degrees.

4. Remove speeder shaft torque arm (9) and weight (17) .

Low Idle

All Governors Except D11N

1. Pressurize or manually move the FARC.

2. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the LEFT when you are facing the governor nameplate. The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The torque arm should be turned counterclockwise.

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Illustration 12	g00368974

3. Adjust drive speed to "Col 4". The terminal shaft angle should read "Col 3" ± .5 degrees. Adjust low idle stop screw (21) in order to obtain a terminal shaft reading of "Col 3" ± .5 degrees.

4. Remove the speeder shaft torque arm (9) and weight (17) .

D11N Governors Only

1. Pressurize or manually move the FARC.

2. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the LEFT when you are facing the governor nameplate. This should load the speed setting lever (CC) against the detent lever stop (DD) .

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The torque arm should be turned counterclockwise.

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Illustration 13	g00368952
Detent Speed Setting Screw

3. Adjust the drive speed to "Col 4". The terminal shaft angle should read "Col 3" ± .5 degrees. Adjust the detent speed setting screw (21) in order to obtain the terminal shaft reading of "Col 3" ± .5 degrees.

4. Remove speeder shaft torque arm (9) and weight (17) .

Pneumatic Speed Control (PSC)

Feedback Spring

In order to use the pneumatic speed control with different air pressure ranges and engine speed settings, the feedback spring must be changed.

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NOTICE
Be careful not to get paint or other foreign debris in the bore during maintenance. This will affect the operation of the control.

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Illustration 14	g00368869

1. Remove the plate (22) from the governor.

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Illustration 15	g00368865

2. Install one of the bolts for plate (22) into the plug (23). Pull the plug (23) out of the bore.

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Illustration 16	g00368856

3. With plug (23) out of the bore, the speed setting piston (24) and the feedback spring (25) can be lifted out of the bore with a magnet.

4. Select the correct feedback spring (25) for the air pressure range and the engine speed rating from Table 2.
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   Table 2

   3500 Engine Pneumatic Speed Control Spring
   Rated Speed rpm	Low Idle rpm (1)	High Idle rpm (2)	Feedback Spring's Part Number	Spring Identification (3)
   900	450	897 to 1016	4W-6628	79
   1000	450	967 to 1165	4W-6632	64
   1100	450	1108 to 1397	4W-6627	50 (std.)
   1200	450	1108 to 1397	4W-6627	50 (std.)
   1300	450	1108 to 1397	4W-6627	50 (std.)
   1400	600	1375 to 1670	4W-6632	64
   1500	600	1375 to 1670	4W-6632	64
   1600	600	1585 to 2018	4W-6627	50 (std.)
   1700	600	1585 to 2018	4W-6627	50 (std.)
   1800	600	1585 to 2018	4W-6627	50 (std.)

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   ( 1 )	The standard air pressure for a governor at low idle is 35 kPa (5.1 psi) (450 rpm) or 70 kPa (10.2 psi) (600 rpm).
   ( 2 )	The standard air pressure for a governor at high idle is 380 kPa (55 psi) or 415 kPa (60 psi).
   ( 3 )	The spring identification number is on the flat ground surface on one end of each spring.

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Illustration 17	g00368855
(25) Feedback Spring. (26) PSC Air Inlet Port.

5. Install feedback spring (25) in the bore over the speed setting rod. The feedback spring should be rotated until the bottom end of the spring is located on the bore's centerline.

   Note: The Feedback Spring (25) may be either left hand wound or right hand wound.

6. Place piston (24) over the feedback spring (25). Push the piston downward into the counterbore.

7. Inspect the seal on the plug (23). If necessary, replace the seal.

8. Push the plug (23) downward into the bore. Remove the bolt.

9. Put plate (22) in position. Install the three bolts and tighten the bolts to a torque of 10 N·m (90 lb in).

Speed Range Adjustment

The Pneumatic Speed Control has two adjustments. One is the speed level adjustment. This increases or decreases the speed at the lower control pressure. The other adjustment is the speed gain adjustment (bellows). This increases or decreases the speed at the upper control pressure.

The bellows is located off-center of the top flange area. The bottom of the bellows has a swivel pin that engages the hole in the end of the speed setting lever. The swivel pin is set off-center to the bottom of the bellows. The swivel pin is in line with the center of the air inlet port in the top of the flange.

Illustration 18	g00367450

There is an index mark that is 0.76 mm (0.030 inch) deep on the outer face of the bellows (25). The index mark is approximately in the central position when the mark is turned to the front of the governor nameplate.

Illustration 19	g00367449

Control air pressure enters the bellows (27) through air inlet port (26) at the top of the flange. Control air pressure expands the speed setting bellows, which pushes down on the lever at the left of the pivot (28). This raises the right end of the lever against feedback spring (25). The force of feedback spring (25) is marked on the end of the spring.

As the bellows turn, the eccentric pin changes the position of the bellows on the speed setting lever. This changes the length of the lever arm. The lever arm is the distance from the pivot to the outer edge of the bellows.

Illustration 20	g00367448
Lower Terminal Shaft Angle

When the bellows turn with the index mark to the right side of the governor, the bellows move closer to the pivot pin. This makes the lever arm shorter. This also decreases the terminal shaft angle for a given air pressure and drive speed.

Illustration 21	g00367443
Higher Terminal Shaft Angle

With the index mark to the left side of the governor, the bellows move farther away from the pivot pin. The lever arm is now longer. This increases the terminal shaft angle for a given air pressure and drive speed.

In order to ensure that the mechanically set low idle stop screw and the mechanically set high idle stop screw do not influence the PSC setting, it is necessary to use the offset rpm and the pressure settings for calibration purposes.

Offset RPM and Pressure Setting Calculations

Use the following equations in order to calculate the offset rpm and pressure settings:

The low idle calibration pressure should be 35 kPa (5 psi) greater than the specified low idle pressure. The high idle calibration pressure should be 14 kPa (2 psi) less than the specified high idle pressure.

Determine the signal pressure range that is specified from low idle operation to high idle operation. Refer to the decal or nameplate that is attached to the governor for the signal pressure range.

Determine the signal pressure gain rate between the low idle speed and the high idle speed.

Note: The calculated offset points are referenced to a Terminal Shaft Angle of "Col 9" ± .5 degrees.

Example

• Signal pressure range: 69 kPa (10 psi) to 414 kPa (60 psi)

• Engine speed range: 350 rpm to 1150 rpm

• Low Speed Engine: Governor Speed Range = 350 rpm × 1.143 to 1150 rpm × 1.143

• Governor Speed Range: 400 rpm to 1314 rpm

• Gain Rate: 2.65 rpm/kPa = (1314 rpm - 400 rpm) ÷ (414 kPa - 69 kPa)

This rpm/kPa value will be used in order to determine the offset calibration point rpm.

Calculate the PSC low idle calibration rpm and the PSC high idle calibration rpm.

Example

Calibration point for low idle:

• Pressure: 104 kPa = 69 kPa + 35 kPa

• Speed: 493 rpm = 400 rpm + [(2.65 rpm/kPa)(35 kPa)]

• Terminal Shaft Degrees: "Col 9" ± .5 degrees

Use the PSC level setting screw in order to set the terminal shaft position.

Calibration point for high idle:

• Pressure: 400 kPa = 414 kPa - 14 kPa

• Speed: 1277 rpm = 1314 rpm - [(2.65 rpm/kPa)(14 kPa)]

• Terminal Shaft Degrees: "Col 9" ± .5 degrees

Use the speed gain adjustment (bellows) in order to set the terminal shaft position.

PSC Check

1. Pressurize or manually move the FARC.

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Illustration 22	g00367441

2. Connect the PSC inlet (26) to regulated air port "C" on 4C-8740 Air Supply and Test Tool Group .

3. Pressurize the PSC to "Col 5" or the low idle air pressure that was calculated. Adjust the drive speed to "Col 6" or the calculated low idle offset rpm. The terminal shaft angle should read "Col 9" ± .5 degrees.

4. Pressurize the PSC to "Col 7" or the calculated high idle air pressure. Adjust the drive speed to "Col 8" or the calculated high idle offset rpm. The terminal shaft angle should read "Col 9" ± .5 degrees.

   If either Step 3 or Step 4 is incorrect the PSC will need to be recalibrated.

Calibration Of The PSC

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Illustration 23	g00367439

1. Remove the lockwire and the plug that cover the PSC level setting screw (29) .

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Illustration 24	g00367438

2. Pressurize the PSC to "Col 5" or the calculated low idle air pressure. Adjust the drive speed to "Col 6" or the calculated low idle offset rpm.

   Adjust the PSC level setting screw (29) in order to obtain a terminal shaft reading of "Col 9".

3. Pressurize the PSC to "Col 7" or the calculated high idle air pressure. Adjust the drive speed to "Col 8" or the calculated high idle offset rpm.

   Note the terminal shaft angle. If the terminal shaft angle is equal to "Col 9" ± .5 degrees, then the PSC calibration is complete. Proceed to Step 6.

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Illustration 25	g00367437

4. Reduce the air pressure to 0 kPa (0 psi). With 0 kPa (0 psi) air pressure, loosen two bolts (29) that hold the bellows clamp (30) down.

   With a 9/16 inch wrench, rotate bellows (27) (gain setting). A clockwise rotation will increase the terminal shaft angle. A counterclockwise rotation will decrease the terminal shaft angle. Tighten the two bolts that hold the bellows clamp down.

5. Repeat Step 2, Step 3, and Step 4 in sequence until each adjustment setting agrees with the Governor Test Specifications or the calculated offset points.

6. Reduce the air pressure to 0 kPa (0 psi).

Checking The Speed Setting Motor

1. Set the drive speed to 1000 rpm.

2. Connect the 4C-8979 Test Lead Tool Group to the 24 VDC speed setting motor and the 24 VDC power supply on the test bench. Use the switch on the Test Lead Group in order to activate the speed setting motor. Check for speeder shaft movement and terminal shaft movement.

Fuel Air Ratio Control (FARC)

FARC Leakdown Check

Illustration 26	g00367436
(30) Fuel Air Ratio Control

1. Connect the FARC inlet to the regulated air port "A" on the 4C-8740 Air Supply and Test Tool Group (8) .

2. Check the FARC leakdown by pressurizing the FARC to 75 kPa (10.9 psi) and closing the valve.

   The FARC should not loose more than 7 kPa (1.02 psi) over a one minute time period. If the FARC fails leakdown, the FARC diaphragm, the lower sliding seal, and the sealing washer or gaskets may need to be repaired.

   Note: The FARC must pass the leakdown check prior to all of the other FARC checks and adjustments.

FARC Level Check

1. Set the FARC inlet pressure to 0 kPa (0 psi).

2. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the RIGHT when you are facing the governor nameplate.

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned clockwise.

3. Set the drive speed to 500 rpm. Pull the manual shutdown lever and release. The terminal shaft angle should read "Col 10" ± .25 degrees.

FARC Level Adjustment

Illustration 27	g00367433

1. With the drive speed set to 500 rpm, adjust the FARC setting screw (G) to "Col 10" ± .25 degrees.

2. After each FARC setting screw adjustment, pull the manual shutdown lever. Release the lever in order to check the FARC setting.

Checking The FARC Preload

Illustration 28	g00371132

1. Connect the FARC inlet to regulated air port "B" on the 4C-8740 Air Supply and Test Tool Group (8). Connect the air bulb to the test group.

2. Set the drive speed to 500 rpm. Pull the manual shutdown lever and release.

3. While you are observing the terminal shaft angle, slowly pump the air bulb until the terminal shaft starts to move. Read the air pressure. This is the FARC Preload. The FARC Preload pressure should be 7 ± 2 kPa (1.0 ± 0.3 psi).

FARC Preload Adjustment

Illustration 29	g00367432
(A) Dust Cover. (B) Preload Setting Screw. (C) Travel Stop Screw. (D) Diaphragm. (E) FARC Cover Assembly. (F) Shutdown Rod Nut. (G) FARC Setting Screw. (H) Sliding Seal. (I) FARC Inlet. (J) Shutdown Rod.

1. Remove the dust cover (A) from top of the FARC cover assembly (E). Adjust the FARC Preload pressure to 7 kPa (1.0 psi). Use a 1/4 inch hex wrench in order to turn the Preload setting screw (B) counterclockwise until movement is detected in the terminal shaft.

2. Slowly turn the Preload setting screw clockwise until no terminal shaft movement is detected. Slowly turn the preload setting screw counterclockwise until the terminal shaft begins to move.

3. Reduce the preload pressure to 0 kPa (0 psi). Slowly increase the preload pressure to 7 kPa (1.0 psi). Ensure that the terminal shaft begins to move when the pressure is 7 ± 2 kPa (1.0 ± 0.3 psi).

4. Adjust the preload setting screw in order to achieve the Preload setting of 7 ± 2 kPa (1.0 ± 0.3 psi).

Checking The FARC Travel Stop

Only the later governors with the single diaphragm FARC have the travel stop (C). Check "Col 11" in order to determine if the governor that is being tested has a FARC travel stop (C) .

1. Connect the FARC inlet to the regulated air port "A" on the 4C-8740 Air Supply and Test Tool Group (8) .

2. Set the pressure to 150 kPa (21.8 psi). The terminal shaft angle should read "Col 11" ± .5 degrees.

Adjustment Of The FARC Travel Stop

1. Set the FARC inlet pressure to 150 kPa (21.8 psi).

2. Use a 3/32 inch hex wrench in order to adjust the travel stop screw (C). Obtain a terminal shaft reading of "Col 11" ± .5 degrees.

   After each adjustment, pull the manual shutdown lever. Release the lever in order to read the terminal shaft angle.

FARC Gain Rate

1. Connect the FARC inlet to the regulated air port "A" on the 4C-8740 Air Supply and Test Tool Group (8). Set the pressure to 0 kPa (0 psi).

2. Set the drive speed to 500 rpm. Pull the manual shutdown lever and release.

3. Increase the air pressure to the FARC inlet in increments. Record the terminal shaft angle. These readings can be plotted in order to show the FARC gain rate.

   Note: The terminal shaft reading must be taken by approaching the pressure targets in the increasing direction.

Governor Terminal Shaft Schedule

The governor terminal shaft schedule can be plotted by using the given points. The terminal shaft readings must be taken in the increasing direction.

1. Pressurize or manually move the FARC.

2. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the RIGHT when you are facing the governor nameplate.

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned clockwise.

3. Set the drive speed. Record the terminal angle as follows:

   Set the drive speed to register "Col 13". Record the terminal shaft angle.

   Set the drive speed to register "Col 2". Record the terminal shaft angle.

   Set the drive speed to register "Col 14". Record the terminal shaft angle.

   Set the drive speed to register "Col 15". Record the terminal shaft angle.

   Set the drive speed to register "Col 16". Record the terminal shaft angle.

   Set the drive speed to register "Col 17". Record the terminal shaft angle.

4. Plot the terminal shaft schedule.

5. Reduce the FARC inlet pressure to 0 kPa (0 psi). Reduce the drive speed to 0 rpm. Shut down the main drive.

Adjustments With The Top Cover Off

Illustration 30	g00367364

Note: Make sure that the oil level of the governor is below the joint face of the top cover and the governor housing. This will eliminate the loss of oil due to spillage.

1. Remove the bolts (31) that hold the top cover (32) in position on the governor. Remove the top cover (32) and the gasket (33) .

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Illustration 31	g00371173

2. Install the test cover (36) and the gasket with the 8T-0854 Pressure Gauge (35) .

3. On the governors that have torque rise control, back out the adjustment screws (34) counterclockwise.

4. Turn the low idle offset screw (S) in the terminal shaft 3 or 4 turns counterclockwise.

5. Engage the governor rig pin (12) .

6. Start the main drive. Warm the governor to 54°C (130°F).

7. Check the oil pump pressure of the governor. The oil pump pressure must reach 689 kPa (100 psi) at a drive speed of 300 rpm.

8. Set the drive speed of the test bench to 1000 ± 20 rpm.

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Illustration 32	g00371192

9. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the RIGHT when you are facing the governor nameplate.

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned clockwise. This will bring the terminal shaft against the governor rig pin.

10. When the governor is at 54°C (130°F), turn on the indicator. Set the indicator to show millimeters. Zero the indicator. Refer to 3161 Governor Test, NEHS0545.

11. Reduce drive speed to 0 rpm. Disengage the governor rig pin.

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Illustration 33	g00367370

12. Turn the compensation needle valve (37) clockwise until the valve stops. Turn the compensation needle valve counterclockwise 3/4 of a turn.

    The governor is now ready for further adjustments.

Adjustment Of The High Idle And The Droop

Illustration 34	g00368997
(F) Shutdown Rod. (J) Shutdown Rod Nut. (K) Engine Oil Supply. (L) Second Breakpoint Adjustment Screw. (M) Torque Rise Control. (N) Governor Pump Pressure. (P) Droop Slider. (Q) First Breakpoint Adjustment Screw. (R) Terminal Shaft. (S) Low Idle Offset Screw. (T) Null Screw. (U) Torque Rise Rod And Jam Nut. (V) Servo Stop Screw. (W) FARC Mid-Grip Helicoil. (X) Speeder Shaft.

Note: The torque rise setting screws (Q) and (L) must not be in contact with the torque rise control springs (M) during the adjustments of the high idle and the droop.

1. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the RIGHT when you are facing the governor nameplate.

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned clockwise.

2. Set the drive speed to "Col 2". Adjust the high idle stop screw (20) in order to obtain a terminal shaft reading of "Col 1" ± .5 degrees.

3. Set the drive speed to "Col 13". The terminal shaft angle should be "Col 12" ± .5 degrees. Adjust the droop slider (P) in order to obtain a terminal shaft angle of "Col 12" ± .5 degrees at a drive speed of "Col 13".

   Move the droop slider away from the speeder shaft in order to decrease the terminal shaft angle. Move the droop slider toward the speeder shaft in order to increase the terminal shaft angle. Adjust the droop slider in very slight movements.

4. Set the drive speed to 0 rpm.

Governors with Torque Rise Only

Adjustment Of The Servo Stop

1. Install the 4C-6099 Torque Arm / 4C-6101 Torque Arm (10) and the 4C-6103 Weight Assembly (11) on the terminal shaft. The torque arm should be on the right side of governor when you are facing the governor nameplate.

   The terminal shaft torque arm must point toward the left when you are facing the end of the test stand. The arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned counterclockwise.

2. Loosen the servo stop screw (V) jam nut. Set the servo stop screw (V) to "Col 20" ± .25 degrees. Tighten the jam nut to a torque of 6 ± .6 N·m (53 ± 5 lb in).

3. Remove the 4C-6099 Torque Arm / 4C-6101 Torque Arm (10) and the 4C-6103 Weight Assembly (11) from the terminal shaft.

Adjustment Of The Servo Null And The Torque Rise

1. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the RIGHT when you are facing the governor nameplate.

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned clockwise.

2. Set the drive speed to "Col 2". Use a 3/32 inch hex wrench in order to turn the null screw (S) on the governor torque control group in a clockwise direction until the screw stops.

3. Loosen the jam nut (U) on the torque rise rod. Rotate the nut (U) in order to obtain a slow terminal shaft movement in the Fuel Off direction. Tighten the jam nut (U) to a torque of 6 ± 0.6 N·m (53 ± 5 lb in). Turn the null screw (S) on the governor torque control group in a counterclockwise direction until the screw stops.

4. Set the drive speed to "Col 15". Adjust the level screw (Q) that contacts the upper torque rise control spring (M) in order to obtain a terminal shaft reading of "Col 18" ± .25 degrees.

   Note: Step 4 relates to Special Instruction, SEHS9351. If Special Instruction, SEHS9351 is used, set the drive speed to "Col 16". Adjust the level screw in order to obtain a terminal shaft reading of "Col 18".

5. Set the drive speed to "Col 17". Adjust the level screw (L) that contacts the lower torque rise control spring (M) in order to obtain a terminal shaft reading of "Col 19" ± .25 degrees.

Low Idle and Low Idle Offset Adjustment

All Governors Except D11N

1. Install both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the LEFT when you are facing the governor nameplate.

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned counterclockwise.

2. Set the drive speed to "Col 21". Adjust the low idle stop screw 21 in order to obtain (Col 22) .

   Slowly advance the low idle offset screw (S) in the terminal shaft until the screw barely engages the floating lever. This causes a slight decrease in the terminal shaft position. At the drive speed "Col 21", the terminal shaft angle should read "Col 22" ± .5 degrees.

3. Set the drive speed to "Col 4". Adjust the low idle stop screw (21) to a terminal shaft angle of "Col 3" ± 1 degree.

D11N Governors Only

Illustration 35	g00367365
(F) Shutdown Rod Nut. (J) Shutdwon Rod. (Y) Shutdown Lever. (Z) Shutdown Lever Setting Screw. (AA) Speeder Shaft. (BB) Detent Position Screw. (CC) Speed Setting Lever. (DD) Detent Lever Stop. (EE) Detent Speed Setting Screw. (FF) Detent Lever. (GG) Stop Screw Cover. (HH) Case.

1. Install the 4C-6098 Torque Arm (Speeder Shaft) (9) on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the LEFT when you are facing the governor nameplate.

   While you are applying moderate downward pressure to the torque arm, turn the detent position screw (BB) in the governor clockwise until the idle detent lever (FF) barely disengages from the speed setting lever (CC) .

   Turn the detent position screw (BB) counterclockwise 5 turns. Hang the 4C-6102 Weight Assembly (17) on the 4C-6098 Torque Arm (Speeder Shaft) (9). This loads the speed setting lever (CC) against the detent lever stop (DD) .

   Set the drive speed to "Col 21". Adjust the detent speed setting screw (EE) in order to obtain a terminal shaft reading of "Col 22".

2. Verify that the torque that is required in order to rotate the speed setting lever (CC) past the detent lever stop (DD) is 5 to 11 N·m (48 to 96 lb in).

3. Repeat Step 1 and Step 2 until a drive speed reading of "Col 21" results in a terminal shaft reading of "Col 22" ± .5 degrees. A 5 to 11 N·m (48 to 96 lb in) torque is required in order to move the speed setting lever (CC) past the detent lever stop (DD) .

4. Both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) should be on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the LEFT when you are facing the governor nameplate. This will load the speed setting lever (CC) against the detent lever stop (DD) .

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned counterclockwise.

   Adjust the low idle stop screw (21) in order to barely contact the stop lever. Turn the low idle stop screw (21) 2 turns counterclockwise.

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Illustration 36	g00371213

5. Install the 1U-7308 Shim Adjustment Tool (38) by using the 2A-4781 Bolt and the 4B-5269 Washer .

   Install the 6V-3075 Dial Indicator with the 6V-2057 Contact in the 1U-7308 Shim Adjustment Tool . Center the dial indicator on the shutdown rod nut (39) .

6. Both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) should be on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the LEFT when you are facing the governor nameplate. This will load the speed setting lever (CC) against the detent lever stop DD.

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned counterclockwise.

   Set the drive speed to "Col 21". Push down on the shutdown rod (J). Set the dial indicator to read 0 at the point when the governor begins to shut down.

   Rotate the speeder shaft stop lever against the low idle stop screw (21) .

   Adjust the shutdown lever setting screw (Z) to read 0 on the dial indicator. Turn the screw once clockwise.

Low Idle Offset Adjustment

1. Both the 4C-6098 Torque Arm (Speeder Shaft) (9) and the 4C-6102 Weight Assembly (17) should be on the speeder shaft. The speeder shaft torque arm should be horizontal and the arm should extend to the LEFT when you are facing the governor nameplate. This will load the speed setting lever (CC) against the detent lever stop (DD) .

   The speeder shaft torque arm should be within ± 30 degrees of horizontal when the arm is installed. The arm should be turned counterclockwise.

   Set the drive speed to "Col 21". Slowly adjust the low idle offset screw (S) in the terminal shaft until the screw engages the floating lever. This will cause a slight decrease in the terminal shaft position. At the drive speed "Col 21", the terminal shaft should read "Col 22" ± .5 degrees.

2. Set the drive speed to "Col 4". The terminal shaft angle should read "Col 3" ± 1 degrees. Adjust the detent speed setting screw (EE) to read "Col 3" ± 1 degree at drive speed "Col 4".

   Rotate the for the speeder shaft stop lever against the low idle stop screw (21). Ensure that the governor shuts down.

3. Reduce the drive speed to 0 rpm. Remove the 6V-3075 Dial Indicator and the 1U-7308 Shim Adjustment Tool .

All Governors

1. Reduce the drive speed to 0 rpm. Depress shutdown rod (J) several times in order to bleed off the pressure in the governor. Remove the test cover.

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Illustration 37	g00367364

2. Install the top cover (32) with a new gasket (33) on the governor. Install the bolts (31). Tighten the bolts to a torque of 10 ± 2 N·m (7 ± 1.5 lb ft).

Adjustment Of The Shutdown Rod

Illustration 38	g00367357

1. Remove the two bolts that hold manual shutdown device (18) to the pressure shutdown device or the electric shutdown device (19). Remove the manual shutdown device and the gasket from the governor.

2. Remove the two bolts that hold the pressure shutdown device (not shown) to the electric shutdown device (19) or governor cover. Remove the pressure shutdown device and the gasket.

3. If the electric shutdown device is used in conjunction with a diode, remove the bolt that holds the diode to the governor. Remove the remaining bolts from the electric shutdown device (19). Remove the electric shutdown device and the gasket.

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Illustration 39	g00367353

4. Set the drive speed to "Col 4". Place a straight edge across the opening in the shutdown rod and the shutdown rod nut (F). Use a 7/16 inch open end wrench in order to turn the shutdown rod nut (F) counterclockwise until the governor begins to shut down. Once the governor begins to shut down, turn the nut clockwise one full turn.

Adjustment Of The Shutdown Device

Note: The electric shutdown device and the pressure shutdown device should be checked prior to the installation, after the installation, and at 1000 hour intervals thereafter.

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NOTICE
Failure to test, inspect and maintain these items could result in faulty operation and possible severe engine damage if an emergency shutdown situation occurs.

The electric shutdown is either an Energize-To-Shutoff (ETS) or an Energize-To-Run (ETR). Identify the type of shutdown device in your governor, and make a note of the type of shutdown device.

1. Visually inspect the pressure shutdown components for signs of burrs, nicks, scoring and/or wear. Repair the components if evidence of a problem exists. Inspect the pressure shutdown gasket. Determine if the gasket is reusable. If necessary, replace the gasket.

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Illustration 40	g00367319
(F) Shutdown Rod Nut. (J) Shutdown Rod. (II) Solenoid. (JJ) Jam Nut. (KK) Set Screw. (LL) Shutdown Plunger. (MM) Solenoid Plunger. (NN) Pivot Pin. (PP) Shutdown Lever.

2. Visually inspect the electric shutdown device and determine if there is any component wear. If the shutdown is an ETS version, pay particular attention to the connection of the shutdown solenoid's plunger and the shutdown lever's link pin.

   If there is evidence of wear, replace the solenoid. Inspect the gasket on the electric shutdown. Determine if the gasket is reusable. If necessary, replace the gasket.

   Check the size of spacer on the solenoid plunger in the electric shutdown. Refer to the Service Magazine Article November 19,, "Field Replacement of Spacer to Correct Possible Sticking in Woodward 3161 Governor Electric Shutoff Group".

Adjustment Of The Electric Shutdown Solenoid

Energize-To-Shutoff (ETS)

1. Place the housing of the electric shutdown in a vise. Use copper jaws or shop towels in order to protect the sides of the aluminum die cast housing. Do NOT excessively tighten the vise.

   Loosen the jam nut (JJ) that holds the solenoid in the electric shutdown's housing. Remove the solenoid coil (II) in order to expose the shutdown plunger (MM) .

   Note: Loctite 222 is used on the threads of the solenoid coil during manufacturing. In addition, the jam nut is tightened to a torque of 75 N·m (55.5 lb ft).

2. Carefully clean any dirt, metal filings or metal chips from the solenoid plunger and from the cavity in the solenoid coil. Turn the jam nut on the solenoid coil so that the nut will not interfere with the adjustment of the solenoid coil. Reinstall the solenoid coil in the electric shutdown's housing by turning the coil four times.

3. Hold the housing and the gasket on a clean flat surface. Adjust the setscrew (KK) until the shutdown plunger (LL) contacts the flat surface. Turn the set screw counterclockwise 1/4 turn.

4. Hold the housing and the gasket on a clean flat surface. Completely turn the solenoid coil into the electric shutoff's housing. Turn the solenoid coil two full turns counterclockwise.

   Apply a new coat of 9S-3263 Thread Lock Compound to the threads of the solenoid coil. Turn the solenoid coil clockwise one full turn.

5. Do not allow the solenoid coil to turn inside the housing. Place the housing of the electric shutdown in a vise. Use copper jaws or shop towels in order to protect the sides of the aluminum die cast housing. Do NOT excessively tighten the vise.

   Tighten the jam nut to a torque of 68 ± 7 N·m (50 ± 5 lb ft) without allowing the solenoid coil to move.

Energize-To-Run (ETR)

1. Place the housing of the electric shutdown in a vise. Use copper jaws or shop towels in order to protect the sides of the aluminum die cast housing. Do NOT excessively tighten the vise.

   Loosen the jam nut (JJ) that holds the solenoid in the housing. Remove the solenoid coil (II) in order to expose the shutdown plunger (MM) .

   Note: Loctite 222 is used on the threads of the solenoid coil during manufacturing. In addition, the jam nut is tightened to a torque of 75 N·m (55.5 lb ft).

2. Carefully clean any dirt, metal filings or metal chips from the solenoid plunger and from the cavity in the solenoid coil. Turn the jam nut on the solenoid coil counterclockwise a couple of turns so that the nut will not interfere with the adjustment of the solenoid coil. Reinstall the solenoid coil in the electric shutdown's housing by turning the coil four times.

3. Hold the housing and the gasket on a clean flat surface. Adjust the setscrew (KK) until the setscrew contacts the shutdown plunger (LL). Turn the setscrew counterclockwise 1/4 turn.

4. Hold the housing and the gasket on a clean flat surface. Apply the appropriate voltage to the solenoid's leads in order to energize the solenoid. With the shutdown in the energized position, turn the solenoid clockwise until the shutdown plunger contacts the setscrew.

   Turn the solenoid coil counterclockwise one time. Apply a new coat of 9S-3263 Thread Lock Compound to the threads of the solenoid coil. Turn the solenoid coil clockwise 1 and 1/4 turns. Disconnect the voltage from the solenoid's leads.

5. Do not allow the solenoid coil to turn inside the housing. Place the housing of the electric shutdown in a vise. Use copper jaws or shop towels in order to protect the sides of the aluminum die cast housing. Do NOT excessively tighten the vise. Tighten the jam nut to a torque of 68 ± 7 N·m (50 ± 5 lb ft) without allowing the solenoid coil to move.

Installation Of The Shutdown Devices

1. Install the electric shutdown device with the gasket on the top cover of the governor. Tighten the three retainer bolts to a torque of 10 ± 2 N·m (7 ± 1.5 lb ft).

   If the electric shutdown is equipped with a diode, attach the diode to the cover. Thread the electrical leads through the conduit's fitting on the cover of the governor.

2. Install the pressure shutdown device with the gasket on the electric shutdown assembly. Tighten the retainer bolts to a torque of 10 ± 2 N·m (7 ± 1.5 lb ft).

3. Install the manual shutdown device with the gasket on the pressure shutdown device. If the pressure shutdown device is not used, install the manual shutdown device with the gasket on the electric shutdown assembly. Tighten the retainer bolts to a torque of 10 ± 2 N·m (7 ± 1.5 lb ft).

4. Ensure that the terminal shaft goes to the Fuel Off position when each shutdown device is activated. Refer to the ""Checking The Shutdown Devices" " section for the procedures.

   The PSC and the FARC MUST be checked and recalibrated whenever the top cover has been removed. Refer to the ""Pneumatic Speed Control (PSC)" " section and the ""Fuel Air Ratio Control (FARC)" " section for the procedures.

   Refer to the ""Governor Terminal Shaft Schedule" " section for the terminal shaft schedule procedure.