Cummins/Onan PCC 2100 — Draining and Flushing the Cooling System
Maintenance · Cooling system / radiator
For the Cummins/Onan PCC 2100, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan GGHE, Cummins/Onan GGHF, Cummins/Onan WSG-1068 engine
Before you start
- Some coolant is toxic. Keep away from children and animals. Follow local environmental regulations for disposal.
- The heater element will burn out if engine coolant is removed with heater connected to power source.
Procedure
- Disconnect engine coolant heater from power source (if equipped).
- Allow engine to cool and remove radiator pressure cap.
- Open the radiator drain cock and remove the water drain plugs (one on each side of engine).
- Place the end of a water hose into the radiator filler and turn on water supply; regulate flow.
- Continue flushing until outflow from drains is clear of rust sediment.
- Replace the water drain plugs and close the radiator drain cock.
- Refill the cooling system with recommended coolant.
Tools required
- Water hose Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Flush until outflow is clear of rust sediment.
Full service-parts list: Cummins/Onan GGHE →, Cummins/Onan GGHF →
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.