PRIORITY - THE FUEL CONTROL HOUSINGS NEED TO BE REPLACED ON CERTAIN 3612 AND 3616 ENGINES - PI3475 - MAILED US AND CANADA, CAC O, BRAZIL, CFEL, LIMITED COSA Caterpillar

U-17
A-12
B-2
E-15
O-14.1
PRIORITY
parts stock action needed
1250  PI3475
COMPLETION DATE  

August 31, 1991  February 29, 1992

The fuel control housings need to be replaced on certain 3612 and 3616
Engines to increase engine speed control.

Model Identification Number
3612 9RC13-83
3616 1PD18-42

Dealers will need to order parts for this Program.
2 - 2A5220 Plug
2 - 1B4218 Washer
1 - 7C8438 Cover
1 - 7E4385 Housing Assembly
1 - 7E4386 Lever
1 - 7E4387 Shaft
1 - 7E4388 Cover
1 - 1L5081 Spacer
1 - 2L6324 Bolt
1 - 1N4859 Gasket
1 - 1N4860 Cover
1 - 7N5368 Pin
1 - 8N1996 Gasket
1 - 0S1571 Bolt
1 - 0S1591 Bolt
8 - 0S1594 Bolt
2 - 9S8752 Nut
8 - 3V3308 Washer
1 - 1W3557 Gasket
1 - 4W4803 Setscrew
1 - 4W5100 Gasket
1 - 4W5140 Information Plate (for new fuel setting)

***** Parts Stock *****
Remove the following parts from parts stock.
7W3632 Lever, Fuel Stop
7W9848 Cover
7W9849 Gasket
9Y0556 Shaft
9Y0557 Housing, Control Rod
9Y3080 Housing Assembly
***** Affected Product *****
See the attached procedure.

U.S. and Canadian owners will receive the attached Owner Notification.

***** Parts Stock *****
Submit one claim for all 7W3632 Levers-Fuel Stop, 7W9848 Covers,
7W9849Gaskets, 9Y0556 Shafts, 9Y0557 Housings-Control Rod, and 9Y3080 Housing
Assemblies removed from parts stock.
***** Affected Product *****
Caterpillar Dealer Suggested Customer Suggested
Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
100% 8 0 0  0 0
NOTE: This is an 8-hour job

Handle the parts in accordance with your Warranty Bulletin on warranty parts
handling.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach. (1-Owner Notification)
(2-Rework Procedure)
COPY OF 

 FOR U.S. AND CANADIAN OWNERS
XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999
PRIORITY - The Fuel Control Housings Need To Be Replaced On
Certain 3612 And 3616 Engines
MODELS INVOLVED - 3612 And 3616 Engines
Dear Caterpillar Product Owner:
The fuel control housings need to be replaced on the products listed below to
increase engine speed control. The repair will be done at no cost to you.
Contact your local Caterpillar dealer immediately and schedule a time to have
this service performed. The repair time for this service is approximately
eight hours.
We regret the inconvenience this may cause you, but urge you to have this
service performed as soon as possible to prevent unscheduled downtime.
Caterpillar Inc.
Identification #(s)
Attached to February 4, 1991 Service Letter
Rework Procedure for Control Housing Replacement
PART 1
Replace the housing and associated hardware per the following instructions.
1. Disconnect the governor control rod (6) at the external lever (8) on the
fuel control housing (7). See Illustration 1.
****** IMAGE: SEBE4501.00001.001
CAPTION: Illustration 1 - Part 1 of 2
Fuel Injection Control Group (Existing Housing)
****** IMAGE: SEBE4501.00001.002
CAPTION:  Illustration 1 - Part 2 of 2
Fuel Injection Control Group (Existing Housing)
****** IMAGE: SEBE4501.00001.003
CAPTION: Illustration 2 - Fuel Injection Linkage Control Housing 7E4393
NOTE: A shop towel placed over the opening in the rear housing chould
help prevent hardware from inadvertently dropping into the
geartrain and causing extensive gear damage at startup.
2. Remove the cover from the back of the fuel control housing. Disconnect
the rod assembly from the lever inside the fuel control housing.
NOTE: Do not attempt to remove the rod assembly that connects the
control housing lever to the linkage in the rear housing.
Removal will result in additional work during injector
synchronization.
3. Remove the 4-0S1594 Bolts (9), gasket, and the fuel control housing (7)
from the rear housing.
4. Put the new gasket (24) in place over the rod assembly (23).
5. Install the 3V3308-Washer (20), 1-9S8752-Nut (11), and 1-0S1591-Bolt
(12) to hold the 7E4386-Lever (13) to the original rod assembly (23).
Put the 7E4386 Lever (13) in position in the 7E4385 Fuel Control Housing
As. (14) and install the 7E4387 Shaft (15). Lubricate the shaft (15)
lightly with engine oil or glycerine before inserting into the control
housing assembly (14). Be sure that the flat surface (B) of
the lever is facing the dial indicator hole (Y) as shown. Install the
0S1571-Bolt (16) to hold the lever (13) onto the shaft (15).
6. Put the fuel control housing (14) and the gasket (24) in position on the
rear housing, and install 4-OS1594-Bolts (9) to hold it in place.
7. Install the original external lever (8) on the shaft (15), and secure.
PART 2
Determine the equivalent fuel position for the new fuel control housing.
****** IMAGE: SEBE4501.00001.004
CAPTION: Illustration 3 - Engine Information Plate
1. Read the "Full Load Static Fuel" value from the existing 9L6531 Engine
Information Plate.
2. Determine the new full load static fuel setting by using either of the
following two methods:
(a) Use the Rack Setting Conversion Data Chart
Note: Only use method (a) if the existing value from the Engine
Information Plate appears on the conversion data chart. If the
existing value does not appear on the conversion data chart, use
method (b).
(b) Use the following formula:
New Value =
-9.03590 + 17.48779 x (existing+10)/22 + 5.19958 x ((existing+10)/22)*
* Quantity Squared
Example for Method (a):
Existing full load static fuel setting as identified on the 9L6531
Engine Information Plate = + 6.10 mm
Find 6.10 mm under "Existing Rack Setting" on the Rack Setting
Conversion Data Chart. Read the equivalent value under "New Rack
Setting". The new calculated full load static fuel setting to be marked
on the new 4W5140 Engine Information Plate is = + 6.55 mm.
Example for Method (b):
Existing full load static fuel setting as identified on the 9L6531
Engine Information Plate = + 5.65 mm
New calculated full load static fuel setting to be marked on the new
4W5140 Engine Information Plate =
-9.03590 + 17.48779 x (5.65+10)/22 + 5.19958 x ((5.65+10)/22)*
* Quantity Squared
= 6.04 mm
Compare with similar values in the conversion data chart to ensure that
the calculated value is correct.
SPECIFIC RACK SETTING CONVERSION DATA CHART
Existing  New Existing New
Rack  Rack Rack  Rack
Setting Setting Setting  Setting
(mm) (mm) (mm)  (mm)
2.30 ...................... 2.37 6.80 ...................... 7.35
2.40 ...................... 2.47 7.00 ...................... 7.58
2.46 ...................... 2.54 7.24 ...................... 7.86
2.90 ...................... 3.01 7.30 ...................... 7.93
3.00 ...................... 3.11 7.70 ...................... 8.40
3.60 ...................... 3.76 7.80 ...................... 8.52
3.80 ...................... 3.98
4.00 ...................... 4.20
4.10 ...................... 4.31
4.15 ...................... 4.36
4.30 ...................... 4.53
4.40....................... 4.64
4.50 ...................... 4.75
4.60 ...................... 4.86
5.00 ...................... 5.30
5.25 ...................... 5.58
5.40 ...................... 5.75
5.45 ...................... 5.81
5.50 ...................... 5.87
5.60 ...................... 5.98
5.70 ...................... 6.09
5.80 ...................... 6.21
6.00 ...................... 6.43
6.10 ...................... 6.55
6.25 ...................... 6.72
6.30 ...................... 6.78
6.50 ...................... 7.00
PART3
Adjust the new parts for the calculated rack setting.4.40
Tools Needed:
1 - 8T1000 Electronic Position Indicator Group or 1 - 6V6170 Timing and Fuel
Setting Tool Group
****** IMAGE: SEBE4501.00001.005
CAPTION: Illustration 4 - Part 1 of 2
8T1000 Electric Position Indicator Group
****** IMAGE: SEBE4501.00001.006
CAPTION: Illustration 4 - Part 2 of 2
6V6170 Timing and Fuel Setting Tool Group
Unit Injector Synchronization
1. Remove the plugs from the housing assembly at location (Y) and (Z).
2. Remove synchronization pin (2), and install it in the threaded hole (Z)
without the spacer (3). Tighten the synchronization pin to 10 +/- 2 Nm.
3. Move the control housing rack shaft in the "ON" direction until the flat
face (A) of the fuel stop lever (13) contacts the synchronization pin
(2) and hold it in this position. Care should be used to ensure that a
constant force is used for unit injector synchronization and the
identical force used for installation of the digital or dial indicator.
Dead weights are recommended. The 3161 governor applications can use
Caterpillar service tool 1U8795 Governor Torque Arm Tool installed on
the opposite end of the governor terminal shaft where the rod assembly
connects.
4. Synchronize the injectors as described in Steps 8 through 17 in Injector
Synchronization in 3612 and 3616 Diesel Engines, Systems Operation
Testing and Adjusting Manual, Form Number SENR3593.
5. Leave the synchronization pin (2) in hole (Z) for now.
Fuel Setting Adjustment with an EGB-29P Actuator
NOTE: Only a mechanic with governor and fuel setting training
should make adjustments to the fuel setting.
1. Install the indicator in the hole (Y) in the fuel control housing.
Either an 8T1000 Electronic Position Indicator Group, or the 6V3075 Dial
Indicator are acceptable to use. Installation instructions for both
indicators are as follows:
* 8T1000 Electronic Position Indicator Group - Install the 5P4814 Collet
in test port (Y). Slide the 8T1002 Probe with the 5P7263 Contact Point
into the 5P4814 Collet until the 8T1002 Probe sleeve bottoms in the
5P4814 Collet. Tighten the collet enough to hold the probe in this
position. Attach the probe to the 8T1001 Indicator.Turn the indicator
ON and set it to measure millimeters. With the indicator ON, touch the
negative (-) button, then touch the zero button. The indicator is now
ready to be used.
* 6V3075 Dial Indicator - Install the 5P4814 Collet in the test port (Y).
Slide the 6V3075 Dial Indicator with the 5P7263 Contact Point into the
5P4814 Collet. When the contact point seats against the fuel stop
lever on surface (B), slide the indicator IN or OUT, until the indicator
dial reads "+5.00 mm". Tighten the collet to hold the indicator in this
position. The indicator is now ready to be used.
NOTE: The fuel stop lever inside the control housing
should remain in contact with the
synchronization pin during indicator
installation.
2. Rotate the actuator terminal shaft (5) to the minimum fuel
position, and hold in place.
3. Install actuator lever on actuator terminal shaft so the centerline
of the lever is 2.0 degrees from the vertical centerline as shown.
****** IMAGE: SEBE4501.00001.007
CAPTION: Illustration 5 - Fuel Injection Control Group (New Housing)
4. Adjust the rod assembly (6) between the control housing lever (8) and
the actuator lever (4) until the Electronic Position Indicator reads
negative (-) 9.50 mm (or the dial indicator reads negative (-) 4.50 mm)
and secure the rod assembly in place with the lock nuts.
NOTE: Adjustment rod assembly should have the same
amount of thread engagement on each end.
WARNING!!
The total amount of travel between the point of actual fuel shutoff and
the actuator "FUEL OFF" position is called deadband. If the maximum
actuator "FUEL OFF" reading is more positive than -9.50 mm on the
Electronic Position Indicator (-4.50 mm if the dial indicator is used),
the deadband can be eliminated which would result in engine overspeed if
operated at high RPM without a load. Engine overspeed due to improper
assembly or adjustment, could result in personal injury, loss of life
and/or property damage.
5. Adjust the fuel setting as follows:
a. Gently rotate the actuator terminal shaft towards maximum fuel
position until surface (A) of the lever makes contact with the
synchronization pin (2). Insure the Electronic Position Indicator
still reads 0.00 mm at this point (or +5.00 mm if the dial indicator
is used). If this is not the indicated reading, repeat steps one
through four of this section. If the indicated reading is
0.00 mm, continue with the procedure. (If the dial indicator is
used, adjust the dial indicator to read 0.00 mm before continuing.)
b. Remove synchronization pin (2) from hole (Z) in the control housing.
c. Install locknut (17) on setscrew (18). Install setscrew (18) in
hole (W) in the fuel control housing.
d. Adjust set screw (18) until the Electronic Position Indicator (or
dial indicator) reads the new fuel setting as determined in Part 2.
NOTE: The indicator will read in the positive
direction for the desired fuel setting.
e. Tighten the locknut on the setscrew.
6. Put gasket (19) and cover (25) in position on the fuel control housing
and install the bolt that hold them in place. Lock wire with a
Caterpillar seal through the bolt (26) head and hole in the cover (25).
This will prevent tampering with engine settings. Install the
synchronization pin (2) in the storage location with spacer (3) as shown
in Illustration 2.
7. Install the plugs (21) and washers (22) in holes (Y) and (Z).
8. Put gasket (27) and cover (28) in place onto the fuel control housing
and secure with bolts.
9. Put gasket (29) and cover (30) in place on the fuel control housing and
secure with bolts.
10. Before starting the engine, put a mark on the actuator shaft position
indicator at the point of minimum actuator travel. This is the engine
stopped position.
WARNING!!
The engine may overspeed due to improper assembly
or adjustment, which could result in personal injury,
loss of life and/or property damage. Be prepared to
stop the engine by activating the emergency air
shutoff or closing the air inlet lines.
11. Start the engine and operate it at low idle. Put a mark on the actuator
shaft position indicator. This is the engine running position.
12. The engine running position of the actuator must be six (6) degrees or
more above the engine stopped position.
13. Operate the engine at high idle with no load to be sure that the
governor/actuator can control the engine.
14. Fill out and install the new 4W5140 Engine Information Plate over
similar area of 9L6531 Engine Information Plate. The 4W5140 Engine
Information Plate should contain the new calculated full load static
fuel setting value. All other information on the new plate should be
the same as the old plate.
Fuel Setting Adjustment with a 3161 Governor
NOTE: Only a mechanic with governor and fuel
setting training should make adjustments to
the fuel setting.
1. Install the indicator in the hole (Y) in the fuel control housing.
Either an 8T1000 Electronic Position Indicator Group, or the 6V3075 Dial
Indicator are acceptable to use. Installation instructions for both
indicators are as follows:
* 8T1000 Electronic Position Indicator Group - Install the 5P4814 Collect
in test port (Y). Slide the 8T1002 Probe with the 5P7263 Contact Point
into the 5P4814 Collet until the 8T1002 Probe sleeve bottoms in the
5P4814 Collet. Tighten the collet enough to hold the probe in this
position. Attach the probe to the 8T1001 Indicator. Turn the indicator
ON and set it to measure millimeters. With the indicator ON, touch the
negative (-) button, then touch the zero button. The indicator is now
ready to be used.
* 6V3075 Dial Indicator - Install the 5P4814 Collet in the test port (Y).
Slide the 6V3075 Dial Indicator with the 5P7263 Contact Point into the
5P4814 Collet. When the contact point seats against the fuel stop lever
on surface (B), slide the indicator IN or OUT, until the indicator dial
reads "+5.00 mm". Tighten the collet to hold the indicator in this
position. The indicator is now ready to be used.
2. Rotate the governor terminal shaft (5) toward minimum fuel until the
governor rig pin (10) can be depressed. Put a 5/32 inch hex wrench in
the governor rig pin (10), push IN, then turn it counterclockwise until
the roll pin locks squarely behind the bracket.
NOTE: The governor rig pin (10) is used to stop
the governor terminal shaft at a fixed
position while adjusting the control rod
assembly (6) to synchronize governor travel
with the engine fuel control linkage travel.
The pin is to be engaged only with the
engine shut down (off).
3. Loosen synchronization pin (2) one to two turns.
4. Gently rotate the governor terminal shaft (5) toward maximum fuel until
the governor rig pin contact is made, and hold in place. The deadweight
used during unit injector synchronization may also be used to hold the
governor terminal shaft against the governor rig pin.
****** IMAGE: SEBE4501.00001.008
CAPTION: Illustration 6 - Fuel Injection Control Group (New Housing)
5. Adjust rod assembly (6) until the indicator returns to 0.00 mm on the
Electronic Position Indicator ( or to +5.00 mm on the dial indicator)
and secure the rod assembly in place with the locknuts.
NOTE: Adjustment rod assembly (6) should have the
same amount of thread engagement on each
end.
6. Rotate governor terminal shaft to minimum fuel position. Put a 5/32 inch
hex wrench in the governor rig pin (10), push IN, then turn it clockwise
until the roll pin unlocks from the bracket. This puts the pin back
into its normal "run" position. The governor is now synchronized to the
engine.
The Electronic Position Indicator at the control housing should read
between -9.50 mm and -12.00 mm. (If the dial indicator is used, the
readings should be between -4.50 mm and -7.00 mm.) If the Electronic
Position Indicator reads more positive than -9.50 mm (ex.-8.75 mm), you
must repeat the steps for unit injector synchronization and fuel
setting adjustments. (If a dial indicator is used and the reading is
more positive than -4.50 mm, i.e. -3.75 mm, you must repeat the steps
for unit injector synchronization and fuel setting adjustments.)
WARNING!!
The total amount of travel between the point of actual fuel shutoff and
the governor "FUEL OFF" position is called deadband. If the maximum
governor "FUEL OFF" reading is more positive than - 9.50 mm on the
Electronic Position Indicator (- 4.50 mm if the dial indicator is used),
the deadband can be eliminated which would result in engine overspeed if
operated at high Rpm without a load. Engine overspeed due to improper
assembly or adjustment, could result in personal injury, loss of life
and/or property damage.
7. Adjust the fuel setting as follows:
a. Retighten synchronization pin to 10 +/- 2 Nm.
b. Gently rotate the governor terminal shaft towards
maximum fuel position until surface (A) of the
lever makes contact with the synchronization pin
(2). Insure the Electronic Position Indicator
still reads 0.00 mm at this point (or +5.00 mm if
the dial indicator is used). If this is not the
indicated reading, repeat steps one through six
of this section. If the indicated reading is 0.00
mm, continue with the procedure. (If the dial
indicator is used, adjust the dial indicator to
read 0.00 mm before continuing.)
c. Remove synchronization pin (2) from hole (Z) in
control housing.
d. Install locknut (17) on setscrew (18). Install
setscrew (18) in hole (W) in the fuel control
housing.
e. Adjust setscrew (18) until the Electronic
Position Indicator (or dial indicator) reads the
new fuel setting as determined in Part 2.
NOTE: The indicator will read in the positive
direction for the desired fuel setting.
f. Tighten the locknut on the setscrew and remove
the deadweight from the governor terminal shaft.
8. Put gasket (19) and cover (25) in position on the fuel control housing
and install the bolt that hold them in place. Lock wire with a
Caterpillar seal through the bolt (26) head and hole in the cover (25).
This will prevent tampering with engine settings. Install the
synchronization pin (2) in the storage location with spacer (3) as shown
in Illustration 2.
9. Install the plugs (21) and washers (22) in holes (Y) and (Z).
10. Put gasket (27) and cover (28) in place onto the fuel control housing
and secure with bolts.
11. Put gasket (29) and cover (30) in place on the fuel control housing and
secure with bolts.
12. Before starting the engine, put a mark on the governor position
indicator at the point of minimum governor travel. This is the engine
stopped position.
WARNING!!
The engine may overspeed due to improper assembly
or adjustment, which could result in personal injury,
loss of life and/or property damage. Be prepared to
stop the engine by activating the emergency air
shutoff or closing the air inlet lines.
NOTE: It may be necessary to back off the Fuel
Air Ratio Control setting in order to start
the engine after this rework. To do this,
remove plug from the front right corner of
the top cover of the governor (as viewed
from the end of the governor shaft output).
Put a 3/16 inch hex wrench through the hole
in the top cover until it engages the
adjustment screw. Turn this screw several
turns in the counterclockwise (CCW) until
the engine will start.
13. Start the engine and operate it at low idle. Put a mark on the governor
position indicator. This is the engine running position.
14. The engine running position of the governor must be six (6) degrees or
more above the engine stopped position.
15. Operate the engine at high idle with no load to be sure that the
governor can control the engine.
16. Fill out and install the new 4W5140 Engine Information Plate over
similar area of 9L6531 Engine Information Plate. The 4W5140 Engine
Information Plate should contain the new calculated full load static
fuel setting value. All other information on the new plate should be
the same as the old plate.
17. It is now necessary to readjust the Fuel Air Ratio Control setting
whether or not an adjustment was required to start the engine.
Fuel Air Ratio Control Adjustment
There are two adjustments for the fuel ratio control. One adjustment
is the fuel limit adjustment, and the other adjustment a gain rate that
is factory set, and must not be changed.
1. The correct Fuel Air Ratio Control setting for 3600 series engines with
Caterpillar 3161 governors is 2.00 mm.
2. Remove the plugs from the housing assembly at location (Y) and (Z).
3. Remove synchronization pin (2), and install it in the threaded hole (Z)
without the spacer (3). Tighten the synchronization pin to 10 +/- 2 Nm.
4. Move the control housing rack shaft in the "ON" direction until the flat
face (A) of the fuel stop lever (13) contacts the synchronization pin
(2) and hold it in this position. Care should be used to ensure that a
constant force is used for unit injector synchronization and the
identical force used for installation of the digital or dial indicator.
Dead weights are recommended. The 3161 governor applications can use
Caterpillar service tool 1U8795 Governor Torque Arm Tool installed on
the opposite end of the governor terminal shaft where the rod assembly
connects.
5. Install the indicator in the hole (Y) in the fuel control housing.
Either an 8T1000 Electronic Position Indicator Group, or the 6V3075 Dial
Indicator are acceptable to use. Installation instructions for both
indicators are as follows:
* 8T1000 Electronic Position Indicator Group - Install the 5P4814 Collet
in test port (Y). Slide the 8T1002 Probe with the 5P7263 Contact Point
into the 5P4814 Collet until the 8T1002 Probe sleeve bottoms in the
5P4814 Collet. Tighten the collet enough to hold the probe in this
position. Attach the probe to the 8T1001 Indicator. Turn the indicator
ON and set it tot measure millimeters. With the indicator ON, touch the
negative (-) button, then touch the zero button. The indicator is now
ready to be used.
* 6V3075 Dial Indicator - Install the 5P4814 Collet in the test port (Y).
Slide the 6V3075 Dial Indicator with the 5P72 Contact Point into the
5P4814 Collet. When the contact point seats against the fuel stop lever
on surface (B), slide the indicator IN or OUT, until the indicator dial
reads " 0.00 mm". Tighten the collet to hold the indicator in this
position. The indicator is now ready to be used.
6. Remove the 1U8795 Governor Torque Arm Tool from the governor terminal
shaft. Make sure the terminal shaft returns to the "FUEL OFF" position.
7. Remove synchronization pin (2) from test port (Z). Install the spacer
(3) on the synchronization pin (2) and install the synchronization pin
(2) in the fuel setting cover.
8. Disconnect the boost line from the fuel ratio control. Plug the boost
line to keep dirt and foreign material out of the engine.
WARNING!!
Work carefully around an engine that is running. Engine parts that are
hot, or parts that are moving, can cause personal injury.
9. Start the engine.
10. Rapidly move the speed control shaft in the speed increase direction.
The rack position indicator will go up to the fuel limit position,
pausing momentarily at this position as the engine accelerates to Hi
idle and then drops back to the idle rack position as the engine reaches
High Idle. Repeat this procedure several times and read the rack
position indicator during each pause.
The point where the rack position indicator pauses is the limit for fuel
control linkage set by the fuel ratio control. If the fuel limit
setting is in need of adjustment, proceed to Step 11. If the fuel limit
setting is correct, stop the engine and proceed to Step 13.
11. Remove plug from the right corner of the top cover (as viewed from the
end of the governor output shaft). Put a 3/16 inch hex wrench through
the hole in the top cover until it engages the adjustment screw.
Rapidly move the speed control shaft in the speed increase direction.
The rack position indicator will go up to the fuel limit position,
pausing momentarily at this position as the engine accelerates to Hi
Idle and then drops back to the idle rack position as the engine speed
reaches High Idle.
During the momentary pause, turn the limit adjustment screw until the
dimension on the rack position indicator is 2.00 mm. Turning the limit
adjustment screw clockwise (CW) will decrease the limiter setting, while
turning the limit adjustment screw counterclockwise (CCW) will increase
the limiter setting.
12. When the adjustment is correct, stop the engine. Remove the hex wrench
and install the plug in the top cover. Put a seal wire through the
holes in both the plug and the bolt head. Install the governor seal.
Remove the plug from the boostline. Connect the boost line from the
inlet manifold to the fuel ratio control.
13. Remove the 8T1002 Probe (or 6V3075 Dial Indicator) and the 5P4814 Collet
from test port (Y).
14. Install the plugs in the test ports (Y) and (Z).