Cummins/Onan — Fuel/Water Separator - Drain (Spin on Type)
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DQFAA, Cummins/Onan DQFAB, Cummins/Onan DQFAC, Cummins/Onan DQFAD, Cummins/Onan QST30-G5 engine
Before you start
- Diesel fuel is a fire and explosion hazard; do not permit any open flame or igniter near the fuel system.
Procedure
- Shut off the engine.
- Wait 1 minute to remove any pressure in the fuel line.
- Place a suitable container under the fuel filter.
- Turn the valve clockwise four complete turns until the valve drops down one inch; drain until clear fuel is visible.
- When clear fuel flows, push the valve up and turn counterclockwise to close drain valve.
- Before starting the engine, remove the container and clean up any fuel spillage.
- Start the engine and check for leaks.
Specs & values
- If more than 60 ml (2 oz) is drained, refilling of the filter is required
Full service-parts list: Cummins/Onan DQFAA →, Cummins/Onan DQFAB →, Cummins/Onan DQFAC →, Cummins/Onan DQFAD →
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.