Cummins/Onan 6.3 NHEL / 6.5 NH — Electric Starter Disassembly
Repair & overhaul
For the Cummins/Onan 6.3 NHEL / 6.5 NH, from the Cummins/Onan service manual.
Applies to: Cummins/Onan NHEL
Before you start
- Support plastic retainer with a vise or other solid surface; use care not to have spring return retainer and support when driving out roll pin.
Procedure
- Disconnect the generator set negative (-) battery cable from the set starting battery.
- Disconnect the generator set positive (+) battery cable from the starter lug terminal.
- Remove the starter mounting screws and carefully disengage the starter from the stator housing.
- Remove starter through-bolts and carefully separate the brush end cap housing and armature assembly.
- Use a 1/8 to 5/32 inch nail set to remove roll pin.
- Remove return spring, gear and clutch assembly as required; always use a new roll pin on reassembly.
Tools required
- 1/8 to 5/32 inch nail set Amazon
- Vise or other solid surface (to support plastic retainer) Amazon
- Hammer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan NHEL →
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.