Cummins/Onan 1750DQKB — Generator Set Grounding Procedure
Maintenance · generator (medium voltage)
For the Cummins/Onan 1750DQKB, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 1750DQKB, Cummins/Onan DQKB, Cummins/Onan DQKC
Before you start
- Do not perform unless fully trained in medium voltage grounding procedures; severe injury or death may result.
Procedure
- Open, lock-out and tag-out all sources of power to the immediate work area.
- Disable the starting system: move switch to 0, 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 (retest devices afterward).
- Remove the metal cover from the generator output box to access load terminals.
- Install the Grounding Cluster ground clamp to a verified grounded conductor.
- Leave grounds connected at least one minute so static charge can dissipate.
- Remove ground cluster; perform PI and/or other stator winding tests; reconnect grounds if more service needed.
- 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.
Tools required
- High voltage gloves with leather protectors Amazon
- Two 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 1750DQKB →, 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.