Cummins/Onan — Raising Under-Floor Mount Generator Set
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan NHEL
Before you start
- The generator set falling can cause severe personal injury or death and equipment damage.
- Exhaust gas presents the hazard of severe personal injury or death. Make sure all components are reinstalled in their original places.
Procedure
- Reposition the floor jack under the reinforcement ribs of the drip tray.
- Slowly lift up the generator set, making sure not to damage electrical connections or the fuel line.
- When the set reaches the upward limit, re-install the support bracket, adjusting with the floor jack as needed.
- Use Loctite or similar thread locking material on the support bracket bolts.
- Install the 5/16-inch bolts to 14 ft-lb (19 N·m).
- Fasten or secure any fuel line and exhaust components moved or disconnected; restore original positions.
- Fasten battery cables at generator set terminals if disconnected.
- Reconnect battery cables at the battery; positive (+) lead first, then negative (-) ground lead last.
- Refill engine oil if it was drained.
- Close the access door.
Tools required
- floor jack Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 5/16-inch FridayParts $221.94 bolts to 14 ft-lb (19 N·m)
Full service-parts list: Cummins/Onan NHEL →
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.