Cummins/Onan — Fuel Filter Maintenance
Maintenance · fuel filters
From a Cummins/Onan service manual covering: 205D3A, 3DJA, 3DJA-1E2236, 3DJA-3E2236. Check it applies to your exact model before use.
Applies to: Cummins/Onan DJA engine
Before you start
- Diesel engine cannot tolerate dirt in fuel system
Procedure
- Two-stage filtration: primary 10-micron filter with replaceable cartridge.
- Secondary filter is 2-to-5-micron.
- Use filters capable of removing micron-size particles.
- Place parts in clean diesel fuel when opening system beyond secondary filter.
Source: Cummins/Onan service 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.