Cummins/Onan — Timing Drive Components - Installation
Installation
From a Cummins/Onan service manual — check it applies to your exact model before use.
Browse Cummins/Onan generators & specs →
Before you start
- Do not rotate the camshafts. Damage to the valves and pistons can occur.
Procedure
- Install camshaft sprockets and bolts finger tight.
- Install left timing chain guide and 2 bolts, tighten to 10 Nm (89 lb-in).
- Install timing chain and right timing chain guide.
- Position timing chain tensioner, install 2 bolts, tighten to 10 Nm (89 lb-in).
- Remove paper clip to release piston.
- Tighten sprocket bolts to 65 Nm (48 lb-ft).
Tools required
- 303-465 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Guide and tensioner bolts 10 Nm (89 lb-in)
- Camshaft sprocket bolts 65 Nm (48 lb-ft)
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.