Cummins/Onan — Generator Set Grounding Procedure
Maintenance · Generator output / stator windings
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DQKB, Cummins/Onan DQKC, Cummins/Onan QSK60 engine
Before you start
- No person should attempt these procedures unless fully trained in medium voltage grounding procedures.
Procedure
- Open, lock-out and tag-out all sources of power to the work area.
- Disable starting system: disconnect battery charger, remove negative battery cable, install lockout device.
- Put on high voltage gloves with leather protectors.
- Using two pre-tested voltage detection devices, verify de-energized condition and retest detectors.
- Remove metal cover from generator output box to access generator load terminals.
- Securely install Grounding Cluster ground clamp to a verified grounded conductor.
- Leave grounds connected for one minute to ensure static charge dissipation.
- Remove ground cluster and perform PI and/or other required stator winding tests.
- When work is complete, remove the Grounding Cluster in reverse order of installation.
- After clearance from all personnel, remove all lock-out devices in reverse order of installation.
Tools required
- High voltage gloves with leather protectors Amazon
- Two pre-tested voltage detection devices Amazon
- Grounding Cluster Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan DQKB →, Cummins/Onan DQKC →
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.