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Fuel Pump (005-016)

Table of Contents

Summary

Summary

General Information

Test

Without Electric Lift Pump With Electric Lift Pump

Preparatory Steps

Marine Applications

Remove

Rear Gear Train

Front Gear Train

Marine Applications

Disassemble

Rear Gear Train

Clean and Inspect for Reuse

Marine Applications

Assemble

Rear Gear Train

Install

Automotive and Industrial

Front Gear Train

Marine Applications

Finishing Steps

With Electric Lift Pump

Marine Applications

Prime



With Hand Priming Pump

Marine Applications

Stepblock With the keyswitch ON and the engine cranking, check

See detail.

the high pressure injection pump.

Stepblock

If the engine can be started, a measurement of the fuel return flow can diagnose a high-pressure fuel pump problem.

StepblockDisconnect the fuel pump return line.

Stepblock

3.9L and 5.9L Engines: Attach the fuel pressure gauge adapter, Part Number 3164044, to the fuel pump return fitting. Install a quick-disconnect block-off fitting, Part Number 3164583, on the disconnected drain line.

Stepblock

4.5L and 6.7L Engines: Attach the female quick-disconnect fuel drain hose, Part Number 4918434, onto the fuel pump drain connection. Install a quick-disconnect block-off fitting, Part Number 4918464, on the disconnected drain line.

Stepblock

At the fuel return manifold, remove the banjo bolt for fuel pump return line and install test fitting, Part Number 3164618.

Stepblock

For marine engines, the return manifold is located on the side of the engine block, next to the ECM.

Stepblock

Place fuel drain hose into graduated beaker, start engine, measure flow.

See detail.

Stepblock Disconnect the batteries.

StepblockPrepare the engine to remove the fuel pump.

See detail.

StepblockPrepare the engine to remove the fuel pump.

See detail.

Stepblock

Disconnect the high-pressure supply line and the EFC Actuator Valve wire harness connector.

StepblockRemove the fuel pump from the gear housing.

StepblockRemove the fuel pump drive access cover.

Stepblock

Remove the fuel pump drive gear retaining nut and lock washer.

Stepblock

Hold the gear puller while removing the fuel pump drive gear.

StepblockRemove the fuel pump assembly.

Stepblock

Marine Applications: Remove the three fuel pump flanged mounting nuts.

StepblockRemove the fuel pump drive access cover

Stepblock

Remove the fuel pump drive gear retaining nut and lockwasher.

Stepblock

Install the spacer, Part Number 4918317, onto the fuel pump drive shaft.

Stepblock

Install the fuel pump drive gear puller, Part Number 3163381, onto the fuel pump drive shaft and gear.

Stepblock

Use a ratchet and remove the fuel pump drive gear from the fuel pump drive shaft.

Stepblock

Remove the spacer, Part Number 4918317, from the fuel pump drive shaft.

StepblockRemove the fuel pump assembly.

Stepblock

Use a fuel pump retention tool to retain the fuel pump drive gear.

See detail.

Stepblock

Loosen the clamp load of the fuel pump drive gear retaining nut by rotating it counterclockwise. Do not remove it from the shaft.

Stepblock

Install a bearing separator, Part Number 3375326 or equivalent, between the fuel pump mounting flange and drive gear. Secure the bearing separator.

Stepblock

Install a snap-on puller onto the bearing separator and the fuel pump driveshaft.

See detail.

Stepblock

Rotate the puller screw until the drive gear is separated from the driveshaft.

Stepblock

Remove the drive gear retaining nut, lockwasher, and drive gear from the fuel pump driveshaft.

Stepblock

Clean the fuel pump with solvent. Dry with compressed air.

Stepblock

Inspect the driveshaft and gear, the o-ring seal, and the o-ring seal area for damage. Clean and repair any burred

surfaces or replace if damage is found.

Stepblock

Inspect gear housing, high-pressure pump mounting bore, and mounting studs for cracks.

Stepblock

Marine: Inspect the driveshaft for damage. Inspect the o-ring seal area for damage.

Stepblock

The pump driveshaft nose and drive gear shaft mating surface must be clean and dry prior to assembly.

Stepblock

Wipe off the driveshaft and gear with solvent and a lint-free cloth. Do not touch the mating surfaces after wiping.

Stepblock

Install the drive gear onto the driveshaft. Install the driveshaft lockwasher and retaining nut and finger tighten.

Stepblock

Use the fuel pump gear retention tool, Part Number 3164707, and a 1/2 inch breaker bar to hold the drive gear in place while tightening the drive gear retaining nut.

Torque: 105 N•m [77 ft-lb]

StepblockInstall the fuel pump on the gear housing.

StepblockInstall the fuel pump mounting nuts and tighten.

Torque: 25 N•m [221 in-lb]

Stepblock

Install the high-pressure supply line from the high-pressure pump to the fuel rail and tighten the holding brackets.

3.9L and 5.9L High Pressure Supply Line Torque: 30 N•m [22 ft-lb]

Install the high-pressure supply line from the high- 4.5L and 6.7L High Pressure

Stepblock

pressure pump to the fuel rail and tighten the holding brackets.

Supply Line Torque: 30 N•m [22 ft-lb]

Stepblock

Install the drive gear retaining nut and lock washer onto the drive shaft. Tighten the gear retaining nut.

Torque: N•m 105 [77 ft-lb]

Stepblock

Install a new square cut o-ring onto the fuel pump drive access cover. Install the fuel pump drive access cover.

Torque: 8 N•m [71 in-lb]

Stepblock


Stepblock

Install a new seal ring on the front of the fuel pump assembly. Be sure the seal ring is not twisted.

Stepblock

Lubricate the seal ring and the mounting bore of the gear housing.

P-80™ rubber lubricant emulsion, Part Number 3824878.

StepblockInstall the fuel pump onto the gear housing.

Stepblock

Install the three fuel pump to gear housing mounting nuts and tighten.


Stepblock

Install the drive gear retaining nut and lock washer onto the drive shaft. Tighten the retaining nut.


Stepblock

Install a new square cut o-ring onto the fuel pump drive access cover. Install the fuel pump drive access cover.

StepblockPrepare the engine for normal operation.

See detail.

StepblockConnect the batteries. Prime the fuel system.

StepblockMarine: Prepare the engine for normal operation.

See detail.

Stepblock

Refer to Procedure 005-999 in Familiarization section for further information.

Stepblock

Allow the lift pump to run by turning the key switch ON and waiting 30 seconds before starting.

StepblockOperate the engine and check for leaks.

Stepblock

Dry Fuel Filter and Fuel Tubes: Before starting the engine, pump the hand priming pump 120 times.

See detail.

Stepblock

Full Fuel Filter and Fuel Tubes: Before starting the engine, pump the hand priming pump 40 times.

See detail.

StepblockOperate the engine and check for leaks.

Stepblock

Prime the fuel system. Refer to Procedure 005-016.

See detail.

General Information TOC

There are four different mounting locations available for high-pressure

fuel pumps. The pump can be mounted in a high or low position in either a front or rear gear train engine. Due to the number of different fuel pump mounting locations, the steps in this procedure have been written to be generic. Some of the illustrations do not represent the parts being removed or installed.

CAUTION

Use caution when disconnecting or removing fuel lines, replacing filters and priming the fuel system, so that fuel is not spilled or drained into the bilge area. Do not drop or throw filter elements into the bilge area. The fuel and fuel filters must be discarded in accordance with local environmental regulations.


CAUTION

Be sure that the fuel inlet and return valves are returned to the open position before cranking the engine. Engine damage can result if the valves are in the wrong position when the engine is cranked or started. Environmental damage can also occur.

Next

Test TOC

CAUTION

Clean all fittings before

With the keyswitch ON and the engine cranking, check the high pressure injection pump.

Check the high pressure injection pump fuel flow as follows:

� Disconnect the high pressure fuel line to the fuel rail from the high pressure injection pump.

� Connect a clear hose to the outlet of the high pressure injection pump.

� Run the high pressure fuel line into an empty bucket.

� Crank the engine for 30 seconds and measure the fuel pump flow.

Minimum fuel pump flow is 75 ml

disassembly. Dirt or contaminants can damage the fuel system.

[2.5 oz] in 30 seconds at 125 rpm or 90 ml [3.04 oz] in 30 seconds at 150 rpm for 4-cylinder and 6-cylinder engines.

If the minimum fuel flow is achieved, the electronic fuel control (EFC) actuator is defective. Refer to Procedure 005-007 in

the ISB e, ISB and QSB (Common Rail Fuel System) Series Engines Service Manual, Bulletin 4021271.

If the minimum fuel flow is not achieved, the high-pressure injection pump is defective and needs to be replaced.

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Summary 1

If the engine can be started, a measurement of the fuel return flow can diagnose a high-pressure fuel pump problem. The following steps describe how to test the high-pressure fuel pump return flow.

A malfunctioning fuel return overflow valve or fuel pump can result in high return from the fuel pump.

The return fuel flow from the pump must be measured at idle conditions. The fuel system leakage test in the INSITE™ electronic service tool can be used to increase system pressure and therefore increase the ability to detect high leakage.

WARNING

The fuel pump high-pressure fuel lines and fuel rail contain very high-pressure fuel. Never loosen any fittings while the engine is running. Personal injury and property damage can result.

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Summary 2

Without Electric Lift Pump


Disconnect the fuel pump return line.

3.9L and 5.9L Engines

Attach the fuel pressure gauge adapter, Part Number 3164044, to the fuel pump return fitting. Install a quick-disconnect block-off fitting, Part Number 3164583, on the disconnected drain line.

4.5L and 6.7L Engines

Attach the female quick-disconnect fuel drain hose, Part Number 4918434, onto the fuel pump drain connection. Install a quick-disconnect block-off fitting, Part Number 4918464, on the disconnected drain line.

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Summary 3

Summary 4

Summary 5

Follow the fuel return line from the fuel pump to the fuel return manifold. At the fuel return

manifold, remove the banjo bolt for fuel pump return line and install test fitting, Part Number 3164618.

For automotive and industrial applications, the return manifold is located near the top of the engine, beside the fuel rail.

CAUTION

If tool Part Number 3164618 is installed at the fuel pump, it will block return flow and cause possible damage to the fuel pump. Install tool Part Number 3164618 only at the fuel return manifold.

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Summary 6

For marine engines, the return manifold is located on the side of the engine block, next to the ECM.

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Summary 7

Place the end of the fuel pressure gauge adapter tool or fuel drain hose into a 500 ml graduated beaker, Part Number 3823705.

Start the engine.

WARNING

Fuel can be returned at highly elevated temperatures. Wear safety glasses and protective gloves and clothing when performing this test. Avoid contact with returned fuel.

Measure the flow rate by recording the amount of time necessary to fill a 400 ml graduated beaker. Flow Specification: Standard Idle Conditions (750 rpm) 4- and 6-cylinder 400 ml (maximum) in 25 seconds

Maximum Flow: Standard Idle Conditions (750 rpm)

4- and 6-cylinder

400 ml in 25 seconds

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Summary 8

Preparatory Steps TOC

WARNING

Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of

Disconnect the batteries.

arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

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Summary 9

WARNING

Fuel is flammable. Keep all cigarettes, flames, pilot lights, arcing equipment, and switches out of the work area and areas sharing ventilation to reduce the possibility of severe personal injury or death when working on the fuel system.

CAUTION

Do not vent the fuel system on a hot engine; this can cause fuel to spill onto a

Disconnect and remove the low-pressure fuel supply and drain lines. Refer to Procedures 006-024 and 006-013.

For engines with a low mount fuel filter, the fuel filter head must be removed to

hot exhaust manifold, which can cause a fire.

CAUTION

Drain the fuel-water separator into a container, and dispose of the contents in accordance with local environmental regulations.

CAUTION

Clean all fittings before disassembly. Dirt or contaminants can damage the fuel system.

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Summary 10

Marine Applications

remove the fuel pump. Refer to Procedure 006-017.

WARNING

Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

WARNING

Fuel is flammable. Keep all cigarettes, flames, pilot lights, arcing equipment, and switches out of

� Remove the low-pressure

the work area and areas sharing ventilation to reduce the possibility of severe personal injury or death when working on the fuel system.

WARNING

Do not vent the fuel system on a hot engine; this can cause fuel to spill onto a hot exhaust manifold, which can cause a fire.

CAUTION

Use caution when draining the fuel system , so that fuel is not spilled or drained into the bilge area. The fuel must be disposed of in accordance with local environmental regulations.

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Summary 11

fuel supply lines. Refer to Procedure 006-024.

� Remove the low-pressure fuel drain lines. Refer to Procedure 006-013.

� Apply a counter-torque to the fitting on the high-pressure pump to reduce the possibility of a leak or a loose fitting. Remove the high-pressure supply line from the fuel pump to the fuel rail (flared connection).

� Disconnect the fuel control actuator electrical connector.

� Remove the dipstick mounting capscrew and position the dipstick out of the way for pump removal.

� Remove the valve cover lubrication vent flex hose

connector at the engine block mounted adapter. Refer to Procedure 003-002.

� Remove the belt guard section located in front of the sea water pump. Refer to Procedure 008-001.

Remove TOC

NOTE: A counter-torque must be applied to the fitting on the high pressure pump. This is to prevent the fitting from being loosened and to prevent the possibility of a leak.

Disconnect the high-pressure supply line from high-pressure fuel pump to the fuel rail and loosen the holding brackets.

Disconnect the EFC Actuator Valve wire

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Summary 12

Rear Gear Train

Front Gear Train

harness connector.

Remove the three flanged fuel pump mounting nuts.

Remove the fuel pump from the gear housing.

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Summary 13

Remove the fuel pump drive access cover with a 3/8-inch drive ratchet.

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Summary 14

Remove the fuel pump drive gear retaining nut and lock washer.

CAUTION

Place a clean cloth in the air-gap between the fuel pump drive gear and the gear cover, or use a screwdriver to prevent the mounting nut and lock washer from being dropped into the front gear train.

CAUTION

The fuel pump drive gear is captive between the gear housing and the gear cover. Do not rotate the engine while the gear is not supported by the fuel pump drive shaft. The gear, gear housing or gear cover can be damaged.

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Summary 15

Marine Applications

Install the fuel pump drive gear puller onto the drive shaft and gear.

Hold the gear puller while removing the fuel pump drive gear.

CAUTION

Protect the fuel pump drive shaft threads from damage during gear removal.

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Summary 16

Remove the fuel pump assembly.

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Summary 17

Remove the three fuel pump flanged

mounting nuts.

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Summary 18

Remove the fuel pump drive access cover with a 3/8-inch drive ratchet.

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Summary 19

CAUTION

Place a clean cloth in the air gap between the

Remove the fuel pump drive gear retaining nut and lockwasher.

fuel pump drive gear and the gear cover, or use a screw driver to prevent the mounting nut and lockwasher from being dropped into the front gear train.

CAUTION

The fuel pump drive gear is captive between the gear housing and the gear cover. Do not rotate the crankshaft while the gear is not supported by the fuel pump drive shaft. The gear, gear housing or gear cover can be damaged.

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Summary 20

Install the spacer, Part Number 4918317, from service tool, Part Number 3163381, onto the fuel pump drive shaft.

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Summary 21

Install the fuel pump drive gear puller, Part Number 3163381, onto the fuel pump drive shaft and gear.

CAUTION

Protect the fuel pump drive shaft threads from damage while removing the fuel pump gear.

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Summary 22

Use a ratchet and remove the fuel pump drive gear from the fuel pump drive shaft.

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Summary 23

Remove the spacer, Part Number 4918317, from the fuel pump drive shaft.

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Summary 24

Remove the fuel pump assembly.

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Summary 25

Disassemble TOC

Rear Gear Train

Use a fuel pump retention tool, Part Number 3164707, and a ½-inch breaker bar to retain the fuel pump drive gear.

Loosen the clamp load of the fuel pump drive gear retaining nut by rotating it counterclockwise. Do not remove it from the shaft.

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Summary 26

Summary 27

Install a bearing

separator, Part Number 3375326 or equivalent, between the fuel pump mounting flange and drive gear.

Secure the bearing separator.

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Summary 28

Install a snap-on puller, Part Number CG150-02, or equivalent onto the bearing separator, Part Number 3375326, and the fuel pump driveshaft.

Rotate the puller screw until the drive gear is separated from the driveshaft.

Remove the drive gear retaining nut, lockwasher, and drive gear from the fuel pump driveshaft.

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Summary 29

Summary 30

Summary 31

Clean and Inspect for Reuse TOC

WARNING

When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer's recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING

Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

CAUTION

Use solvent or cleaner that will not harm aluminum.

Clean the fuel pump with solvent.

Dry with compressed air.

CAUTION

Do not allow the cleaner to enter the fuel fittings. Dirt and debris can damage fuel system.

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Summary 32

Inspect the driveshaft and gear for damage. Replace if damage is found.

Inspect the o-ring seal for damage. Replace if damage is found.

Inspect the o-ring seal area for damage. Clean and repair any burred surfaces.

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Summary 33

Inspect gear housing, high-pressure pump mounting bore, and mounting studs for cracks.

Marine Applications

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Summary 34

Inspect the driveshaft for damage. Replace the fuel pump if damage is found.

Inspect the o-ring seal area for damage. Clean and repair any burred surfaces.

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Summary 35

Assemble TOC

Rear Gear Train

The pump driveshaft nose and drive gear shaft mating surface must be clean and dry prior to assembly.


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Summary 36

Summary 37

Install the drive gear onto the driveshaft.

Install the driveshaft lockwasher and retaining nut and finger tighten.

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Summary 38

Use the fuel pump gear retention tool, Part Number 3164707, and a 1/2 inch breaker bar to hold the drive gear in place while tightening

the drive gear retaining nut.

Torque Value:

105 n.m

[77 ft-lb ]

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Summary 39

Install TOC


Install the fuel pump on the gear housing.

NOTE: Timing of the high-pressure pump with the crankshaft is not required.

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Summary 40

Install the fuel

pump mounting nuts and tighten.

Torque Value:

25 n.m

[221 in-lb ]

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Summary 41

Install the high-pressure supply line from the high-pressure pump to the fuel rail and tighten the holding brackets.

NOTE: Apply a counter-torque on the high-pressure pump outlet port to prevent over-tightening.

3.9L and 5.9L High Pressure Supply Line

30 n.m

[22 ft-lb ]

4.5L and 6.7L High Pressure Supply Line

30 n.m

[22 ft-lb ]

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Summary 42

Summary 43

Front Gear Train

Connect the EFC actuator valve wire harness connector.

CAUTION

Place a clean cloth in the air-gap between the fuel pump drive gear and the gear cover, or use a screw driver to prevent the mounting nut and lock washer from being dropped into the front gear train.

CAUTION

The fuel pump drive gear is captive between the gear housing and the gear cover. Do not rotate the engine while the gear is not supported by the fuel pump drive shaft. The gear, gear housing or gear cover can be

Marine Applications

NOTE: The engine barring tool, Part Number 3824591, can be used to prevent the crankshaft from rotating while tightening the retaining nut.

Install the drive gear retaining nut and lock washer onto the drive shaft. Tighten the gear retaining nut.

damaged.

Torque Value:

105 n.m

[77 ft-lb ]

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Summary 44

Install a new square cut o-ring onto the fuel pump drive access cover.

Install the fuel pump drive access cover with a 3/8-inch drive ratchet. The plate is threaded into the gear cover.

Torque Value:

8 n.m

[71 in-lb ]

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Summary 45

The fuel pump driveshaft nose and drive gear shaft mating surface must be clean and dry prior to installation.

Wipe off the driveshaft and gear with solvent and a lint-free cloth. Do not touch the

WARNING

When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer's recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING

Some solvents are flammable and toxic. Read the manufacturer's instructions before using.

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Summary 46

mating surfaces after wiping.

Install a new seal ring on the front of the fuel pump assembly. Be sure the seal ring is not twisted.

Lubricate the seal ring and the mounting bore of the gear housing with P-80™ rubber lubricant emulsion, Part Number 3824878.

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Summary 47

Summary 48

Install the fuel pump onto the gear housing.

Install the three fuel pump to gear housing mounting nuts and tighten.

Torque Value:

25 n.m

[18 ft-lb ]

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Summary 49

Summary 50

CAUTION

NOTE: The engine barring tool, Part Number 3824591, can be used to prevent the crankshaft from rotating while tightening the retaining nut.

Install the drive

Place a clean cloth in the air gap between the fuel pump drive gear and the gear cover, or use a screw driver to prevent the mounting nut and lockwasher from being dropped into the front gear train.

CAUTION

The fuel pump drive gear is captive between the gear housing and the gear cover. Do not rotate the crankshaft while the gear is not supported by the fuel pump drive shaft. The gear, gear housing or gear cover can be damaged.

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Summary 51

gear retaining nut and lock washer onto the drive shaft. Tighten the retaining nut.

Torque Value:

105 n.m

[77 ft-lb ]

Install a new square cut o-ring onto the fuel pump drive access cover.

Install the fuel pump drive access cover with a 3/8-inch drive ratchet. The plate is threaded into the gear cover.

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Summary 52

Finishing Steps TOC


For engines with a low mount fuel filter, install the fuel filter head. Refer to Procedure 006-017.

Install the low

pressure fuel supply lines. Refer to Procedure 006-024.

Install the low pressure fuel drain lines. Refer to Procedure 006-013.

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Summary 53

Connect the batteries.

WARNING


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Summary 54

Marine Applications

Prime the fuel system. See the Prime step in this procedure.

WARNING


WARNING

Fuel is flammable. Keep all cigarettes, flames, pilot lights, arcing equipment, and switches out of

� Install the valve cover lubrication vent flex hose connection at the block mounted adapter. Refer to Procedure 003-018.

� Apply a counter-torque to the fitting on the high-pressure pump to reduce the possibility of a leak or a loose fitting. Install the high-pressure fuel supply line from the fuel pump to the fuel rail (flared connection).

� Install the low-pressure fuel supply lines. Refer to Procedure 006-024.

� Install the

the work area and areas sharing ventilation to reduce the possibility of severe personal injury or death when working on the fuel system.

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Summary 55

low-pressure fuel drain lines. Refer to Procedure 006-013.

� Connect the fuel control actuator electrical connector.

� Install the belt guard section located in front of the sea water pump. Refer to Procedure 008-001.

� Connect the batteries. Refer to Procedure 013-009.

� Prime the fuel system. See the Prime step in this procedure.

Operate the engine and check for leaks.

Prime TOC


WARNING

The fuel pump high-pressure fuel lines and fuel rail contain very high-pressure fuel. Never loosen any fittings while the engine is running. Personal injury and property damage can result.

CAUTION

Be sure that the fuel inlet and return valves are returned to the open position before cranking the engine. Engine damage can result if the valves are in the wrong position when the engine is cranked or started. Environmental damage can also occur.

CAUTION

Use caution when disconnecting or removing fuel lines, replacing filters and priming the fuel system, so that fuel

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Summary 56


With Hand Priming Pump


is not spilled or drained. The fuel and fuel filters must be discarded in accordance with local environmental regulations.

Allow the lift pump to run by turning the key switch ON and waiting 30 seconds before starting.

NOTE: It is not necessary to vent air from the high-pressure fuel system before starting the engine. Cranking the engine will prime the fuel system.


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Summary 57

Summary 58

Dry Fuel Filter and Fuel Tubes: this condition occurs if the engine has come from the manufacturing plant without being tested before shipping, if the fuel

Marine Applications

filters have been changed. Before starting the engine, pump the hand priming pump 120 times.

Full Fuel Filter and Fuel Tubes: This condition occurs if the engine is being installed for the first time after being built, but was tested at the manufacturing plant or is being reinstalled. Before starting the engine, pump the hand priming pump 40 times.

NOTE: NOTE: It is not necessary to vent air from the high-pressure fuel system before starting the engine. Cranking the engine will prime the fuel system.


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Summary 59

Summary 60

Summary 61

WARNING

Fuel is flammable. Keep all cigarettes, flames, pilot lights, arcing equipment, and switches out of the work area and areas sharing ventilation to reduce the possibility of severe personal injury or death when working on the fuel system.

CAUTION

Use caution when disconnecting or removing fuel lines, replacing filters and priming the fuel system, so that fuel is not spilled or drained into the bilge area. Do not drop or throw filter elements into the bilge area. The fuel and fuel filters must be discarded in accordance with local environmental regulations.

CAUTION

Failure to properly prime the fuel system on marine

Last Modified: 27-Feb-2006

Copyright© 2006

Cummins, Inc.

NOTE: It is not necessary to vent air from the high-pressure fuel system before starting the engine. Cranking the engine will prime the engine.

The fuel transfer pump is initiated by turning the keyswitch to the ON position. The pump will run for 50 to 60 seconds, then shut off. Priming the fuel system requires cycling the keyswitch several (5 or more) times to make sure the fuel filter is primed properly and that all the air is out of the fuel system, down stream through the fuel cooler.

engines can result in damage to the fuel cooler. Be sure the drain valve(s) are open. Be sure a good flow of fuel is present through the fuel cooler by cycling the keyswitch at least five times before starting the engine.

Previous Summary 62

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