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ISBe/ISB Series Engines – 006-015   Fuel Filter (Spin-On Type)

General Information

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 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.
 WARNING 

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

Be sure that the fuel inlet and return valves are returned to the open position before cranking engine. Engine damage can result if valves are in the wrong position when the engine is cranked or started. Environmental damage can also occur. Refer to Procedure 006-999 in Familiarization section for further information.
 
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Initial Check

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With Electric Lift Pump


Measure the fuel pressure at the fuel filter inlet.

Measure the pressure at
high idle:

Fuel Pressure Range At Fuel Filter Inlet with Electric Lift Pump (Engine Running)
kpa psi
0 MIN 0
79.9 MAX 11.6

If the engine will
not start, measure the fuel pressure while cranking the engine:

Fuel Pressure Range At Fuel Filter Inlet with Electric Lift Pump (Engine Cranking)
kpa psi
0 MIN 0
79.9 MAX 11.6

Record the fuel filter inlet pressure.

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Install a M10 male Compuchek™ fitting, Part Number 3824842, on the diagnostic port on the outlet side of the fuel filter.

Connect a fuel pressure gauge to the Compuchek™ fitting.

Measure the pressure at
low idle:

Fuel Pressure Range At Fuel Filter Outlet with Electric Lift Pump (Engine Running)
kpa psi
0 MIN 0
79.9 MAX 11.6

If the engine will
not start, measure the fuel pressure while cranking the engine:

Fuel Pressure Range At Fuel Filter Outlet with Electric Lift Pump (Engine Cranking)
kpa psi
0 MIN 0
79.9 MAX 11.6

Record the fuel filter outlet pressure value and subtract it from the previously measured fuel filter inlet pressure.

Maximum Pressure Drop Across Fuel Filter
kpa psi
34 MAX 5

If the pressure drop is greater than the specified value, the fuel filter
must be replaced.

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Without Electric Lift Pump


Measure the fuel pressure at
low idle:

Fuel Pressure Range At Fuel Filter Inlet without Electric Lift Pump (Engine Running)
kpa psi
503 MIN 73
1303 MAX 189

If the engine will
not start, measure the fuel pressure at the fuel filter inlet (engine cranking).

Fuel Pressure Range At Fuel Filter Inlet without Electric Lift Pump (Engine Cranking)
kpa psi
303 MIN 44
1103 MAX 160

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If the fuel pressure is below the minimum at the inlet side of the filter:

  1. Check for a high fuel inlet restriction.
  2. For engines with an electric lift pump, check for a malfunctioning electric lift pump.
  3. Check for air in fuel.
  4. For engines without an electric lift pump, check for a damaged gear pump.

Reconnect the fuel lines.

Record the fuel filter inlet pressure measured.

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Disconnect the high pressure pump inlet from the fuel filter exit.

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Insert the fuel pressure gauge adapter, Part Number 3164044, between the high pressure pump inlet line and the fuel filter outlet.

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Measure the fuel outlet pressure at
low idle.

Fuel Pressure Range At Fuel Filter Outlet without Electric Lift Pump (Engine Running)
kpa psi
503 MIN 73
1303 MAX 189

Record the fuel filter outlet pressure and subtract it from the fuel filter inlet pressure.

Maximum Pressure Drop Across Fuel Filter
kpa psi
200 MAX 29

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If the pressure drop across the fuel filter is greater than the specified value, the fuel filter
must be replaced.

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Remove

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Disconnect the wiring harness from the water-in-fuel sensor, if equipped.

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 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.

Loosen and remove the fuel filter.

Make sure the seal ring does
not stick to the fuel filter head.

Remove the ring with an o-ring pick, if necessary.

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Install

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Lubricate the o-ring seal with clean lubricating oil.

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 CAUTION 

Mechanical overtightening can distort the threads as well as damage the filter element seal or filter can.

NOTE: Do
not pre-fill the on-engine fuel filter.

Install the filter on the filter head. Tighten the filter until the gasket contacts the filter head surface.

Tighten the fuel filter an additional ¾ turn after contact or follow filter manufacturer instructions.

Torque Value:  23  n.m  [17 ft-lb]

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Prime

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With Electric Lift Pump


 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.
 WARNING 

Be sure that the fuel inlet and return valves are returned to the open position before cranking engine. Engine damage can result if valves are in the wrong position when the engine is cranked or started. Environmental damage can also occur. Refer to Procedure 006-999 in Familiarization section for further information.
 CAUTION 

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

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Allow the lift pump to run by turning the keyswitch 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.

Operate the engine and check for leaks.

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Without Electric Lift Pump


 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.
 WARNING 

Be sure that the fuel inlet and return valves are returned to the open position before cranking engine. Engine damage can result if valves are in the wrong position when the engine is cranked or started. Environmental damage can also occur. Refer to Procedure 006-999 in Familiarization section for further information.
 CAUTION 

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

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After Filter Change:

Primary Method:

Unlock the manual priming pump handle by turning counterclockwise. Pump the primer handle until resistance is felt (approximately 140-150 strokes). Lock the manual priming pump handle and crank the engine. Start should occur within 5 seconds.

NOTE: Do
not fill new filters with fuel prior to assembly as this will allow unfiltered fuel to enter the system and may cause damage to fuel system components.

  
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Alternative method:

Unlock the manual priming pump handle by turning counterclockwise. Pump the primer handle 60 times. Lock manual priming pump handle and crank the engine. Start should occur within approximately 20 seconds.

NOTE: Do
not exceed starter cranking limitations.

After Running the Vehicle Tank Dry:

Be sure there is fuel in the vehicle fuel tank. Unlock the manual priming pump handle by turning it
counterclockwise. Pump the primer until resistance is felt (50-60) strokes. Lock manual priming pump handle and crank the engine. Start should occur within 5 seconds.

NOTE: Do
not remove and fill filters with fuel prior to priming the system in an attempt to reduce priming time as this will allow unfiltered fuel to enter the system and may cause damage to fuel system components.

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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.

Operate the engine and check for leaks.

  
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Last Modified:  19-Aug-2008
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Published by Jack

Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.