Procedures For The Installation And Initial Start-Up Of Gas Engine Chiller Drivelines{1014} Caterpillar

Engines:

G3408 (S/N: 6FW1-UP)

G3412 (S/N: 8LW1-UP)

G3508 (S/N: 9AW1-UP)

G3512 (S/N: 6JW1-UP)

G3516 (S/N: 8PW1-UP)

Introduction

This Special Instruction provides the required information for the installation of a Caterpillar gas engine chiller driveline. This instruction also provides the procedure for the initial start-up.

In order to have a successful start-up, the personnel that are involved in the start-up of the gas engine chiller driveline must be knowledgeable about Caterpillar gas engines. The personnel should be familiar with all the literature that is listed in the ""References" " section of this Special Instruction.

References

Service Manuals

• Service Manual, RENR1340, "G3408C"

• Service Manual, SENR6560, "G3412C"

• Service Manual, SENR6415, "G3500 (EIS)"

Operation And Maintenance Manual

• Operation And Maintenance Manual, SEBU7121, "Gas Engine Chiller Driveline"

Owner's Manual

• Owner's Manual, RENR1332, "G3400 And G3500 Gas Engine Driven Chiller Engine Control Panel Operator's Manual"

Technical Data Manuals

• Technical Data Manual, LEKQ7735, "G3408 Technical Data"

• Technical Data Manual, LEKQ7750, "G3408 Catalyst Technical Data"

• Technical Data Manual, LEKQ7738, "G3412 Technical Data"

• Technical Data Manual, LEKQ7517, "G3412 Catalyst Technical Data"

• Technical Data Manual, LEKQ7397, "G3508 Technical Data"

• Technical Data Manual, LEKQ7398, "G3512 Technical Data"

• Technical Data Manual, LEKQ7399, "G3516 Techncial Data"

Special Instructions

• Special Instruction, SEHS9195, "Installation Of Auxiliary Oil Filter"

• Special Instruction, SEHS9298, "Installation And Maintenance Of Gaseous Fuel Filters"

• Special Instruction, SEHS9769, "Installation And Initial Start Up Procedures For G3500 Engines"

• Special Instruction, REHS0371, "Installation And Initial Start-Up Procedure For G3300 and G3400 Engines"

Miscellaneous

• Methane Number Program, LEKQ6378

• Manual, LEKQ2368, "Gas Engine Application And Installation Guide"

• Engine Performance Manual, LEBQ2024, "G3400 Generator Set"

• Engine Performance Manual, LEBQ6169, "G3500 Generator Set"

Weight of Chiller Package

Table 1

Chiller Package Weights
Engine Model	Rigging Weight (1)	Operating Weight (2)
G3408	9334 kg (20,560 lb)	9561 kg (21,060 lb)
G3412	9988 kg (22,000 lb)	10260 kg (22,600 lb)
G3508	17406 kg (38,340 lb)	17951 kg (39,540 lb)
G3512	19477 kg (42,900 lb)	20203 kg (44,500 lb)
G3516	21429 kg (47,200 lb)	22337 kg (49,200 lb)

( 1 )	The rigging weight is without loose attachments or engine coolant. The rigging weight includes gearbox oil. All other fluid systems are dry.
( 2 )	This weight is the operating weight with fluids.

Chiller Driveline Center of Gravity

Illustration 1	g00497678
(1) Reference line 01 is the centerline of the crankshaft (horizontal plane). (2) Reference line 02 is the centerline of the engine (vertical plane). (3) Reference line 03 is the rear face of the cylinder block (zero plane). (4) The intersection of the centerlines.

Table 2

The Center of Gravity for the Chiller Driveline (1)
Engine Model	Dimension of the X-axis (2)	Dimension of the Y-axis (3)	Dimension of the Z-axis (4)
G3408	-675 mm (-26.6 inch)	-340 mm (-13.4 inch)	65 mm (2.6 inch)
G3412	-445 mm (-17.5 inch)	-315 mm (-12.4 inch)	55 mm (2.2 inch)
G3508	-245 mm (-9.6 inch)	-250 mm (-9.8 inch)	40 mm (1.6 inch)
G3512	5 mm (.2 inch)	-220 mm (-8.7 inch)	35 mm (1.4 inch)
G3516	245 mm (9.6 inch)	-220 mm (-8.7 inch)	50 mm (2 inch)

( 1 )	This is the center of gravity of the driveline at the rigging weight. The distances that are given are measured from the centers of gravity to the appropriate reference lines. Refer to the figure for the specific locations of the reference lines.
( 2 )	The dimension of the X-axis is the distance in front of the rear face of the cylinder block (reference line 03). The negative dimension of the X-axis is the distance in back of the rear face of the cylinder block (reference line 03).
( 3 )	The dimension of the Y-axis is the distance above the centerline of the crankshaft (reference line 01). The negative dimension of the Y-axis is the distance below the centerline of the crankshaft (reference line 01).
( 4 )	The dimension of the Z-axis is the distance to the right of the centerline of the engine when the engine is viewed from the flywheel (reference line 02). The negative dimension of the Z-axis is the distance to the left of the centerline of the engine, when the engine is viewed from the flywheel (reference line 02).

Static Isolator Loading

Illustration 2	g00497827
(A) G3400 Chiller Driveline. (B) G3500 Chiller Driveline. (1), (2), (3), and (4) Isolators. (5) Compressor. (6) Gearbox. (7) Engine.

Table 3

Static Isolator Loading (1)
Engine Model	Isolator 1	Isolator 2	Isolator 3	Isolator 4
G3408	2315 kg (5100 lb)	2497 kg (5500 lb)	2497 kg (5500 lb)	2225 kg (4900 lb)
G3412	2406 kg (5300 lb)	2724 kg (6000 lb)	2724 kg (6000 lb)	2452 kg (5400 lb)
G3508	5630 kg (12,400 lb)	3995 kg (8800 lb)	3859 kg (8500 lb)	4449 kg (9800 lb)
G3512	5584 kg (12,300 lb)	4404 kg (9700 lb)	4404 kg (9700 lb)	5675 kg (12,500 lb)
G3516	6674 kg (14,700 lb)	4994 kg (11,000 lb)	4949 kg (10,900 lb)	5720 kg (12,600 lb)

( 1 )

The weight that is given is only of the driveline. The loading of the static isolators is calculated with the weight of the wet driveline. The weight of the wet driveline only includes the standard attachments that are installed at the factory. The actual loading depends on the method that is used to adjust the isolators when the driveline is installed.

Required Tools

The following tools are required in order to correctly adjust a gas engine to the specifications.

Table 4

Part Number	Description
1U-5470	Engine Pressure Test Group (1)
8T-0452	Manometer Gauge (2)
8C-9904	Electronic Tool Group
7X-1400	Electronic Tool Group
NEXG4511	Software Program
	Exhaust Analyzer (3)
9S-9082	Engine Turning Tool
9U-5007	820 N·m (600 lb ft) Torque Wrench

( 1 )	The 1U-5470 Engine Pressure Test Group includes the gauges for the fuel pressure, the boost pressure, the intake manifold pressure, and the aftercooler's outlet pressure. More than one 1U-5470 Engine Pressure Test Group may be required.
( 2 )	Two manometers are needed for G3500 Engines.
( 3 )	The Caterpillar Service Tools Group should be consulted for information on exhaust analyzers.

Installation

Each installation of a Gas Engine Chiller Driveline is different. For optimum performance and service life, the installation should conform to the requirements that are in the Manual, LEKQ2368, "Gas Engine Application And Installation Guide".

Fuel System

The piping for the fuel must be large enough in order to provide constant fuel pressure to the driveline. Refer to the Manual, LEKQ2368, "Gas Engine Application And Installation Guide" for assistance in determining the pipe size that is needed for the fuel system.

A flexible connection should be used between the driveline and the piping for the fuel supply.

A fuel filter should be installed in order to protect the entire fuel system on the driveline. Refer to the Special Instruction, SEHS9298, "Installation And Maintenance Of Gaseous Fuel Filters" for more information.

A manually operated valve should be installed to the driveline at the fuel supply connection in order to allow servicing of the fuel system.

A pressure port must be provided in order to monitor the fuel pressure to the driveline.

Exhaust System

The exhaust piping must conform to the Manual, LEKQ2368, "Gas Engine Application And Installation Guide" requirements. The restriction of the exhaust should be kept as low as possible. Provisions must be made in order to check the exhaust back pressure and the exhaust emissions.

If a movable rain cap is used, the rain cap must be easily observed in order to ensure that the rain cap is opening when the engine is operating. The rain cap must be easily opened and the rain cap must be easily closed. The rain cap should not stick in the open position or in the closed position.

For each cubic foot per minute of methane (CH₄) that is consumed during combustion, approximately 0.095 lb (0.012 US gal) of water is formed. Drains must be provided in order to allow the condensate to drain from the exhaust system. Long exhaust pipes may require more than one drain for the condensation.

Any exhaust piping that is used indoors should be insulated in order to reduce the heat inside the room due to radiation.

Flexible connections must be used in order to protect the engine exhaust's components from the stresses that are induced by the expansion of the external piping.

Crankcase Ventilation

Reference: Consult the Manual, LEKQ2368, "Gas Engine Application And Installation Guide" for assistance when you are installing a crankcase ventilation system.

Any system that is installed must maintain a minimum back pressure. No more than 0.5 inches of water back pressure is permissible.

Cooling System

Gas Engine Chiller Drivelines use a common heat exchanger in order to isolate the engine cooling systems from the external cooler. Refer to the Manual, LEKQ2368, "Gas Engine Application And Installation Guide" for more information. The cooling water system should provide constant pressure and constant flow. Valves should be used in order to isolate the external system from the driveline for service work.

Pressure taps must be provided in order to monitor the pressure drop across the external circuit of the driveline's heat exchangers. The minimum pressure drop is 48 kPa (7 psi).

A strainer should be installed prior to the driveline's heat exchanger in order to minimize any plugging of the heat exchanger. Valves should be installed in order to allow servicing of the strainer without draining the entire cooling system. Ports should also be provided in order to monitor the pressure drop across the strainer. These ports can also be used in order to drain the strainer for servicing.

Air Supply

Compressed air is required in order to actuate the clutch. Compressed air may also be used in order to start the engine. Refer to the Manual, LEKQ2368, "Gas Engine Application And Installation Guide" for more information. The compressed air system must be large enough to achieve the following two tasks. The compressed air system must supply air for starting, and the system must recover quickly in order to engage the clutch.

Table 5

Engine Model	Required Air Supply Pressure
G3408, G3412, G3508, G3512	125 psi
G3516	135 psi

Installations with more than one unit must be able to start one engine while another engine is under load. Check valves may be required in order to maintain air pressure at the air pallet for the chiller's clutch while the compressor supplies enough air pressure in order to crank another chiller.

Refer to the Manual, LEKQ2368, "Gas Engine Application And Installation Guide" for more information.

Electrical Systems

Reference: Consult the Manual, LEKQ2368, "Gas Engine Application And Installation Guide" for additional information.

Power Distribution (AC)

Illustration 3	g00317663
Center Control Panel Wire Connection

The driveline uses 480 volts (AC) and 24 volts (DC). Connection points for the 480 volt supply are in the panel at the rear of the driveline's skid. Route the 480 volt wires through the center tray in the panel. Make connections to the disconnect switch on the left side terminals.

DC Power Supply

The driveline's engine control system requires a power supply of 24 volts (DC). Current requirements are approximately 10 amperes for the control system. If electric starters are used, the source's capacity must be increased in order to accommodate the increased current demand during starting. Refer to the Manual, LEKQ2368, "Gas Engine Application And Installation Guide" for sizing information for the power supply.

Note: A battery charger can not be used as a source for the 24 volts (DC). A battery charger must be connected to a set of batteries in order to function properly.

On drivelines that use electric starters, connect a 24 volt power supply directly to the starters.

Illustration 4	g00317666
(1) CB2. (2) Terminal 5.

On drivelines that use air starters, connect the positive terminal of the 24 volt supply to CB2 (1) on the control panel. Connect the negative terminal of the 24 volt supply to Terminal 5 (2) on the control panel.

Welding

Welding on the driveline is permitted when proper precautions are followed. Follow these precautions in order to prevent damage to the driveline's components. All electronic components are subject to damage from welding currents. Bearings will be damaged if welding currents are passed through the bearings.

1. Ensure that all of the switches are in the OFF position.

2. Disconnect the power supplies to the driveline.

3. Connect the ground cable directly to the member that is being welded. Place the clamp close to the weld in order to reduce the possibility of damage to the driveline's components from the welding current.

4. Protect all of the nonferrous parts from welding debris and from spatter.

Alignment And Dowel Installation

All drivelines are aligned in the factory. Compressors on the following models are dowelled in the factory: G3408, G3412, G3508, G3512 and G3516. Transmission gears and engines must be dowelled on-site.

Take care when you are installing the condenser and the evaporator piping. This will minimize the adjustment that is required for alignment of the driveline.

Alignment

Proper alignment is required in order to provide maximum life and performance of the following components: compressor, transmission gear, clutch, couplings and engine. Proper alignment can be accomplished by using dial indicators or a laser alignment tool.

This procedure is performed while the driveline is cold. Ensure that all of the mating surfaces are free of dirt, grease, paint, and rust. It is best to check the alignment of the bore and the alignment of the face simultaneously.

Note: If dial indicators are being used, make sure that the brackets that are being used do not sag.

In order to align the driveline, the following items must be accomplished:

• The air supply to the clutch must be connected. Air is required in order to complete the alignment.

• The 24 volt power supply must be connected to the engine's control panel. The 24 volts are required in order to engage the clutch for alignment.

• The following piping must be completed: Fuel, Cooling Water (Driveline), Refrigerant, Condenser, Evaporator and Engine Exhaust.

• The refrigerant must be fully charged.

• The following cooling water systems must be fully charged: Driveline, Condenser and Chilled Water.

• The following reservoirs must be full: Engine crankcase and Compressor's sump.

• The shells and the driveline must be suspended on the isolators.

The following steps should be completed in order to align the driveline:

1. Secure the engine so that the engine cannot be rotated accidentally from the control panel.

2. Install the engine turning tool.

3. Remove the high speed guard and remove the low speed guard.

4. In order to rotate the compressor with the turning tool, the clutch must be engaged. Install a temporary jumper wire from Terminal 301 to Terminal 1 in the engine's control panel. Remove this jumper wire after the alignment has been completed.

5. Use the tables from this Special Instruction in order to determine the correct target for the alignment.

6. Record the data for the alignment.

7. Align the high speed shafts from the transmission gear to the compressor first.

   1. Turn on the compressor's lubrication pump. Allow the pump's pressure to increase to the normal operating level. Turn off the pump. Wait for two minutes before you proceed.
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   Illustration 5	g00318092
   (3) Bracket. (4) Indicator on Diameter of Flange. (5) Driving Equipment. (6) Indicator on Face of Flange. (7) Driven Equipment.

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   Illustration 6	g00318816
   The letters represent the four positions of the dial indicator on the flange in order to measure the alignment.

   2. If you are using dial indicators, install brackets (3) on the driving equipment (5) on the gear's output shaft. Place one of the indicators on the input flange's face (6) on the compressor. Place the other indicator on the diameter (4) of the flange. Take the indicator readings at 90 degree intervals through one complete revolution of the compressor shaft.

   3. If you are using a laser alignment tool, install the tool and follow the manufacturer's directions in order to measure the alignment. Set the compressor as the stationary machine. Set the transmission gear as the adjustable machine.

   4. Maneuver the transmission gear with the jacking screws that are provided. Adjust the height by adding or by removing shims.

   5. Repeat the process until the alignment meets the targets that are listed on the appropriate table.

   6. Tighten the mounts to the standard torque.

8. Align the coupling between the engine and the transmission gear.

   1. Treat the transmission gear as the driving equipment and treat the engine as the driven equipment.

   2. If you are using dial indicators, install the brackets on the transmission gear's input shaft. Place one of the indicators on the face of the flywheel. Place the other indicator on the diameter of the bore. Take the indicator readings at 90 degree intervals through one complete revolution of the compressor shaft.

   3. If you are using a laser alignment tool, install the tool and follow the manufacturer's directions in order to measure the alignment. Set the transmission gear as the stationary machine. Set the engine as the adjustable machine.

   4. Maneuver the engine with the jacking screws that are provided. Adjust the height by adding or by removing shims.

   5. Repeat the process until the alignment meets the targets that are listed on the appropriate table.

   6. Tighten the mounts to the standard torque.

9. Before installing the flywheel guard, grease the clutch bearings.

Dowel Installation

Drivelines should be dowelled after the final alignment is completed. The installation of dowels will keep the driveline in alignment until one of the components is changed.

Compressors on the following models are dowelled at the factory: G3408, G3412, G3508, G3512 and G3516. The transmission gear and the engine must be dowelled on-site.

G3408 and G3412 Dowel Installation

The transmission gear that is mounted on the right side of the engine must be dowelled on the following models: G3408 and G3412. Also, the transmission gear that is mounted on the rear of the engine of the engine must be dowelled on the following models: G3408 and G3412.

Illustration 7	g00318165

Dowel the right side of the transmission gear to the skid with 113-6960 Dowels .

Illustration 8	g00318283

Dowel the rear engine mounts to the skid with 147-5444 Dowels . Dowel the rear engine mounts to the flywheel housing with 4V-4818 Dowels .

G3508, G3512, And G3516 Dowel Installation

All of the G3500 drivelines require the right mounts on the transmission gear to be dowelled to the skid. The front and rear engine mounts should also be dowelled to the skid.

Illustration 9	g00318165

Dowel the mounts on the right side of the transmission gear to the skid with 113-6960 Dowels .

Illustration 10	g00318381

Dowel the front and rear engine mounts to the skid with 147-5444 Dowels .

Targets For Alignment

Measured With A Dial Indicator

Table 6

Alignment of the High Speed Shaft (mm)
Engine	Alignment Of The Bore				Alignment Of The Face (Total Indicator Reading)
	A - C		B - D
G3408	-0.05 ± 0.15		0.00 ± 0.15		0.08
G3412	-0.05 ± 0.15		0.00 ± 0.15		0.08
G3508	0.30 ± 0.15		-0.15 ± 0.15		0.1
G3512	0.30 ± 0.15		-0.15 ± 0.15		0.1
G3516	-0.05 ± 0.15		0.50 ± 0.15		0.1

Table 7

Low Speed Shaft Alignment (mm)
Engine	Alignment Of The Bore				Alignment Of The Face (Total Indicator Reading)
	A - C		B - D
G3408	0.15 ± 0.20		0.00 ± 0.20		0.2
G3412	0.15 ± 0.20		0.00 ± 0.20		0.2
G3508	-0.30 ± 0.20		0.00 ± 0.20		0.33
G3512	-0.30 ± 0.20		0.00 ± 0.20		0.33
G3516	-0.36 ± 0.20		-0.10 ± 0.20		0.33

Table 8

Alignment of the High Speed Shaft (mils)
Engine	Alignment Of The Bore				Alignment Of The Face (Total Indicator Reading)
	A - C		B - D
G3408	-2 ± 6		0 ± 6		3
G3412	-2 ± 6		0 ± 6		3
G3508	12 ± 6		-6 ± 6		4
G3512	12 ± 6		-6 ± 6		4
G3516	-2 ± 6		2 ± 6		4

Table 9

Alignment of the Low Speed Shaft (mils)
Engine	Alignment Of The Bore				Alignment Of The Face (Total Indicator Reading)
	A - C		B - D
G3408	6 ± 8		0 ± 8		8
G3412	6 ± 8		0 ± 8		8
G3508	-12 ± 8		0 ± 8		13
G3512	-12 ± 8		0 ± 8		13
G3516	-14 ± 8		-4 ± 8		13

Measured With A Laser

Table 10

Alignment of the High Speed Shaft (mm)
Engine	Vertical	Horizontal	Vertical Angle (mm/100mm Diameter)	Horizontal Angle (mm/100mm Diameter)
G3408	0.03 ± 0.08	0.00 ± 0.08	0.00 ± 0.10	0.00 ± 0.10
G3412	0.03 ± 0.08	0.00 ± 0.08	0.00 ± 0.10	0.00 ± 0.10
G3508	-0.15 ± 0.08	-0.08 ± 0.08	0.00 ± 0.10	0.00 ± 0.10
G3512	-0.15 ± 0.08	-0.08 ± 0.08	0.00 ± 0.10	0.00 ± 0.10
G3516	0.03 ± 0.08	0.03 ± 0.08	0.00 ± 0.10	0.00 ± 0.10

Table 11

Alignment of the Low Speed Shaft (mm)
Engine	Vertical	Horizontal	Vertical Angle (mm/100mm Diameter)	Horizontal Angle (mm/100mm Diameter)
G3408	0.08 ± 0.10	0.00 ± 0.10	0.00 ± 0.10	0.00 ± 0.10
G3412	0.08 ± 0.10	0.00 ± 0.10	0.00 ± 0.10	0.00 ± 0.10
G3508	-0.15 ± 0.10	0.00 ± 0.10	0.00 ± 0.13	0.00 ± 0.13
G3512	-0.15 ± 0.10	0.00± 0.10	0.00 ± 0.13	0.00 ± 0.13
G3516	-0.18 ± 0.10	0.05 ± 0.10	0.00 ± 0.13	0.00 ± 0.13

Table 12

Alignment of the High Speed Shaft (mils)
Engine	Vertical	Horizontal	Vertical Angle (mils/10 inches Diameter)	Horizontal Angle (mils/10 inches Diameter)
G3408	1 ± 3	0 ± 3	0 ± 4	0 ± 4
G3412	1 ± 3	0 ± 3	0 ± 4	0 ± 4
G3508	-6 ± 3	-3 ± 3	0 ± 4	0 ± 4
G3512	-6 ± 3	-3 ± 3	0 ± 4	0 ± 4
G3516	1 ± 3	1 ± 3	0 ± 4	0 ± 4

Table 13

Low Speed Shaft Alignment (mils)
Engine	Vertical	Horizontal	Vertical Angle (mils/10 inches Diameter)	Horizontal Angle (mils/10 inches Diameter)
G3408	3 ± 4	0 ± 4	0 ± 4	0 ± 4
G3412	3 ± 4	0 ± 4	0 ± 4	0 ± 4
G3508	-6 ± 4	0 ± 4	0 ± 5	0 ± 5
G3512	-6 ± 4	0 ± 4	0 ± 5	0 ± 5
G3516	-7 ± 4	2 ± 4	0 ± 5	0 ± 5

Prestart Information

Provide the driveline with the 480 volts power supply and the 24 volt power supply. Ensure that all the control panels are activated.

Check the oil pump of the transmission gear for the correct rotation. Actuate C2 in the electrical panel (AC) while you are watching the oil pressure gauge. If the pump does not produce pressure, change the rotation of the pump.

With the engine control switch in the AUTO position, turn on the jacket water heater. Check for warming at the heater's outlet. If the heater's outlet does not warm up, check the setting of the thermostat. Reset the thermostat to 50°C (120°F).

Connect a jumper wire from Terminal 301 in the engine's control panel to the 24 volt power supply. Adjust the air pressure to the clutch to 792.8 kPa (115 psi) for the following models:

• G3408

• G3412

• G3508

• G3512

Adjust the air pressure to the clutch to 862 kPa (125 psi) for the G3516.

Engage and disengage the clutch. Adjust the air pallet needle valve until the air pressure gauge indicates 792.8 kPa (115 psi) (two seconds after the actuation). The pressures that are mentioned above are applicable to the following models:

• G3408

• G3412

• G3508

• G3512

Adjust the air pallet needle valve until the air pressure gauge indicates 862 kPa (125 psi) for the G3516 (two seconds after the actuation). Lock down the needle valve by using the setscrew in the handle. Remove the jumper wire.

Check the throttle linkage for the correct adjustment. Ensure that the throttle linkage moves easily.

Purge the fuel supply line to the regulator until gas is available.

Install a water manometer in order to measure the air/fuel differential pressure on each carburetor.

Install a pressure gauge on the fuel supply line.

Install a pressure gauge on the water line which flows to the driveline. Also install a pressure gauge on the water line which flows from the driveline.

Install the exhaust analyzer.

Check the program's settings on the status control module.

The Initial Settings For The 2301A

Since the governor has been set at the factory, only minor adjustments are necessary. The following settings are used as initial governor speed settings only.

Table 14

The Initial Settings For The 2301A
Parameter	G3400	G3500
Gain	6	2
Reset	8	9.5
Compensation	6	3
Start Fuel Limit Position	3	3
Range	1800 rpm (1)	1500 rpm (1)
High Limit	(2)	(2)
Low Limit	(3)	(3)
Level	1400 rpm	1000 rpm

( 1 )	In order to set the high limit on the speed range control to the limit's maximum, rotate the range control counterclockwise until the control takes control of speed. Adjust the control to the desired speed.
( 2 )	While the engine is operating in the maintenance option and the speed control at the rated speed, decrease the high limit until the limit takes control of the engine speed. Advance the limit until the engine runs at the desired speed.
( 3 )	Rotate the low limit counterclockwise to the stop. The low limit should then be rotated two turns in the clockwise direction.

Check the timing and set the timing according to the appropriate Technical Data Book.

Initial Start

Set the engine control switch to maintenance. Start the engine. Run the engine at low idle. Walk around the engine in order to determine if there are any leaks. Switch the speed control switch to the high idle position. Allow the engine to run at high idle for a few minutes.

Take note of the fuel pressure while the engine is at low idle, at high idle, and at the stopped position.

Monitor the coolant temperatures while the engine is operating.

Monitor the heat exchanger's inlet pressure and the heat exchanger's outlet pressure.

Monitor the engine oil pressure.

Shut down the engine with the engine control switch.

Operational Check

With the engine control switch in the AUTO position, start the engine with the York panel.

Check the air/fuel ratio and set the air/fuel ratio as near full load as possible. Refer to the appropriate Technical Data Book for the specifications.

Monitor the pressures and the temperatures.

Verify that the safety devices will produce alarms and shutdowns while the engine is under load.