Cummins/Onan — Coolant pump/alternator belt replacement
Repair & overhaul · Belt drive
From a Cummins/Onan owner's manual covering: CFP-015, CFP11E, CFP15E, CFP23E, CFP30E, CFP50, CFP59, CFP5E, CFP60E, CFP7E, CFP83, CFP83-F10…. Check it applies to your exact model before use.
Applies to: Cummins/Onan CFP23E, Cummins/Onan CFP83-F10, Cummins/Onan CFP83 engine
Before you start
- Do not roll a belt over the pulley or pry it on with a tool.
Procedure
- Remove the belt guard.
- Use a 3/8 in. drive ratchet or breaker bar to rotate the tensioner arm away from the belt and remove the belt.
- Check the belt tensioner cap screw torque per the torque tables.
- Check the tensioner arm, pulley, and stops for cracks; replace if cracked.
- Verify the tensioner arm stop is not in contact with the spring casing stop.
- Check the tensioner bearing and rotate the tensioner pulley; it should spin freely.
- Inspect clearance between the tensioner spring case and the tensioner arm; replace tensioner if clearance exceeds 3 mm (0.12 in).
- Use a 3/8 in. drive ratchet or breaker bar to rotate the tensioner slowly away from belt contact.
- Install the replacement drive belt.
- Check the belt is centered on the tensioner pulley.
- Reinstall the belt guard.
Tools required
- 3/8 in. drive ratchet or breaker bar Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Replace tensioner if clearance exceeds 3 mm (0.12 in)
- Always replace the belt when a tensioner is replaced
Full service-parts list: Cummins/Onan CFP23E →, Cummins/Onan CFP83-F10 →
Source: Cummins/Onan owner'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.