Cummins/Onan — Out-of-Service Protection (Storage Over 30 Days)
Maintenance · Complete generator set
From a Cummins/Onan owner's manual covering: 10HDKAG, G1250s, SKB1.5U6D2RA. Check it applies to your exact model before use.
Applies to: Cummins/Onan 10HDKAG, Cummins/Onan HDKA, Kubota V1505-E3BG engine
Before you start
- Battery electrolyte can cause severe eye damage and burns to the skin.
Procedure
- Exercise the genset until engine reaches operating temperature.
- Shut down and disconnect battery cables, negative first; store battery cool and dry.
- Trickle charge battery once every 30 days.
- Drain crankcase oil while warm, replace oil filter, refill and tag oil viscosity.
- Check coolant level and test mixture if freezing temperatures are possible.
- Plug the exhaust outlet.
- Clean and wipe entire genset; lightly coat rust-prone parts with grease or oil.
Tools required
- Trickle charger Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan HDKA →, Kubota V1505-E3BG engine →
Source: Cummins/Onan owner'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.