Cummins/Onan 10W30 — Serpentine Belt Replacement
Repair & overhaul · Serpentine drive belt
For the Cummins/Onan 10W30, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan GGHE, Cummins/Onan GGHF, Cummins/Onan WSG-1068 engine
Before you start
- The belt idler is under tension. Do not allow your hands to get between the belt and pulley. Personal injury can result.
Parts for this job
- 512-0252 Belt — Cummins/Onan GGHE Amazon eBay $298.00
- 512-0252 Belt — Cummins/Onan GGHF Amazon eBay $298.00
Part numbers from the service-parts lists for Cummins/Onan GGHE, Cummins/Onan GGHF. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Slip new serpentine belt onto all pulleys except for the water pump/fan drive pulley.
- Insert a 1/2 inch male square ratchet or breaker bar into tensioner arm.
- Lift up until spring tension is relieved sufficiently to position the belt over the water pump/fan drive pulley; slowly release spring tension onto belt.
- Install fan guard.
- Connect the negative (-) cable to the battery.
- Start genset and visually check belt for proper alignment with engine running.
Tools required
- 1/2 inch male square ratchet or breaker bar Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- The spring-loaded idler maintains the correct belt tension.
Full service-parts list: Cummins/Onan GGHE →, Cummins/Onan GGHF →
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.