Cummins/Onan CFP11E — Fuel Filter Replacement
Maintenance · Fuel filter / fuel-water separator
For the Cummins/Onan CFP11E, from the Cummins/Onan operator's manual.
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Before you start
- Do not open the fuel filter/water separator drain valve or dismantle fuel lines with the engine running - high pressure fuel spray can cause injury or fire
Procedure
- Shut off the engine.
- Close any fuel valves (if equipped) to prevent fuel from draining or siphoning.
- Clean the area around the fuel filter or fuel/water separator heads.
- Remove the spent filter canisters using a filter wrench.
- Clean the filter mounting head surfaces of sludge buildup and foreign particles.
- Lubricate the gasket seals with clean SAE 15W-40 lubricating oil.
- Center the filter ring and screw the filter canister on until gasket is snug, then tighten an additional 1/4 turn.
- Open the fuel supply valves (if equipped).
- Press CRANK BATT A or CRANK BATT B to start the engine and allow fuel to flow through the system.
- Depress the contactor switch up to fifteen seconds or until the engine starts; repeat up to three times if necessary.
Tools required
- filter wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 1/4 turn after gasket contact
- do not engage starter more than 15 seconds; wait 15 seconds between attempts
Source: Cummins/Onan operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.