Cummins/Onan — Run the Generator Set (Final Drive Belt Check)
Operation · Fan drive belt
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DQKB, Cummins/Onan DQKC, Cummins/Onan QSK60 engine
Before you start
- Contact with fan, belt, or pulleys can result in severe personal injury; all shroud and guard pieces must be fastened in place.
Parts for this job
Part numbers from the service-parts lists for Cummins/Onan DQKB, Cummins/Onan DQKC. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Confirm the drive belt is properly seated in all grooves in both pulleys by visual inspection.
- If the belt wanders, walks or jumps between pulleys, realign fan drive or reinstall belt.
- If correction needed, stop engine, disconnect negative lead of starting batteries and disassemble guard.
- Realign the fan drive pulley and check alignment again.
- Start genset and check belt walk again.
- Attach and secure all fan guard pieces removed for belt adjustment.
- Recheck coolant levels after engine cools; add coolant if required.
Tools required
- Safety glasses Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan DQKB →, Cummins/Onan DQKC →
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.