Cummins/Onan CFP5E / CFP7E — Coolant Pump/Alternator Belt Tension
Adjustments
For the Cummins/Onan CFP5E / CFP7E, from the Cummins/Onan owner's manual.
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Procedure
- Disconnect both batteries, negative cable first.
- Check drive belt tension.
- Use Cummins belt tension gauge Part No. 3822524.
- Measure tension in center span between alternator and idler pulleys.
- Belt tension should be between 18 - 149 N-m (60-110 ft-lb).
- Deflection method: apply 110 N-m (25 ft-lb) force on belt.
- If deflection exceeds one belt thickness per foot, adjust tension.
Tools required
- Cummins belt tension gauge Part No. 3822524 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Belt tension: 18 - 149 N-m (60-110 KuduParts $70.00 ft-lb)
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.