Cummins/Onan JWC4-10S-3 — Removing and Replacing Radiator
Maintenance
For the Cummins/Onan JWC4-10S-3, from the Cummins/Onan service manual.
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Procedure
- Remove front side panels and slide front top plate back.
- Open radiator drain cock and drain radiator.
- Loosen hose clamps; disconnect water inlet elbow.
- Remove bolts from housing front support and fan guard.
- Tip front support with radiator forward and remove carefully.
- Remove nuts holding radiator to crossmember; lift radiator from support.
- Reinstall by reversing procedure; tighten hose clamps last and check for leaks.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.