Cummins/Onan — Maintaining the Battery
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKC
Before you start
- Battery gas is highly explosive; ventilate the battery area, wear safety glasses, and do not smoke
Procedure
- Keep the battery case and terminals clean and dry.
- Keep the battery terminals tight.
- Remove battery cables with a battery terminal puller.
- Make sure which terminal is positive (+) and which is negative (-) before making battery connections.
- Always remove the negative (-) cable first and reconnect it last to reduce arcing.
Tools required
- Battery terminal puller Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 12 Volt battery required to power control and starting circuits
Full service-parts list: Cummins/Onan HDKC →
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.