Cummins/Onan 6.5NH - 3CR / 6000 A — Oil Pump Removal and Installation
Repair & overhaul
For the Cummins/Onan 6.5NH - 3CR / 6000 A, from the Cummins/Onan service manual.
Applies to: Cummins/Onan NH engine
Procedure
- To remove the oil pump, detach the intake cup assembly.
- Unscrew the oil pump assembly from the intake cup.
- Check the oil pump thoroughly for worn parts.
- Oil the pump to prime it before reinstalling.
- Except for gaskets, the component parts of the pump are not available individually; install a new pump assembly if required.
Tools required
- Wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Oil pump torque 7-9 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.