Cummins/Onan — Generator Set Inspection
Maintenance
From a Cummins/Onan operator's manual covering: 5.0 MDKUB, 6.0 MDKUB, 7.5 MDKWB, 9.0 MDKWB. Check it applies to your exact model before use.
Applies to: Cummins/Onan 5.0 MDKUB, Cummins/Onan 6.0 MDKUB, Cummins/Onan 7.5 MDKWB, Cummins/Onan 9.0 MDKWB, Cummins/Onan MDKUB, Cummins/Onan MDKWB, Kubota Z482B engine, Kubota D722B engine
Before you start
- Inhalation of exhaust gases can cause severe personal injury or death.
- Fuel leakage will create a fire hazard.
- Ignition of explosive battery gases can cause severe personal injury.
Procedure
- Inspect daily or after every 8 hours of operation.
- Check exhaust system for leaks; repair immediately.
- Check fuel system for leaks; replace worn fuel line components.
- Check DC electrical system: battery terminals clean and tight.
- Check mechanical condition: loose belts, fittings, leaking gaskets, hoses, damage.
- With genset running, check gauges: oil pressure 28-64 psi; coolant 165-195°F; DC voltmeter 14-15 volts.
Specs & values
- Oil pressure 28 to 64 psi (294 to 543 kPa)
- Coolant temperature 165° to 195°F (74° to 91°C)
- DC voltmeter 14 to 15 volts on 12-volt Amazon eBay $11.99 FridayParts $65.01 system
- Raw water discharge about 3 gal/min (11.4 liter/min)
Full service-parts list: Cummins/Onan 5.0 MDKUB →, Cummins/Onan 6.0 MDKUB →, Cummins/Onan 7.5 MDKWB →, Cummins/Onan 9.0 MDKWB →, Cummins/Onan MDKUB →, Cummins/Onan MDKWB →, Kubota Z482B engine →
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.