Cummins/Onan CFP11E — Coolant Pump/Alternator Belt Replacement
Repair & overhaul
For the Cummins/Onan CFP11E, from the Cummins/Onan operator's manual.
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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" 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 tensioner if cracked.
- Verify tensioner arm stop is not in contact with the spring casing stop.
- Check the tensioner bearing spins freely with no binding, eccentric motion, or end-play.
- Inspect clearance between tensioner spring case and arm; replace as an assembly if clearance exceeds 3 mm (0.12 in).
- Rotate the tensioner away from the belt area and install the replacement drive belt.
- Check that the belt is centered on the tensioner pulley.
- Reinstall the belt guard.
Tools required
- 3/8" 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
- tensioner clearance limit 3 mm (0.12 in)
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.