Cummins/Onan — Install Radiator Pipes (Spec. A)
Installation · Radiator pipes and hoses
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DQKB, Cummins/Onan DQKC, Cummins/Onan QSK60 engine
Procedure
- Slide radiator hose all the way onto both ends of each tube using WD40 lubricant.
- Slip hose clamps over radiator hose and onto mating tubes on engine and radiator.
- Move tube into position; slide hose over top mating tube and tighten clamps.
- Slide hose over bottom mating tube and tighten clamps.
- Install the tube clamp on the radiator.
- Attach the fill tube between the LTA expansion tank and LTA water pump.
- Connect the vent pipes; install the check valve as shown.
- Tighten clamps on both ends of all tubes to 110 inch-lbs (12 N·m).
- Connect the fuel cooler input hose to fuel drain on the engine.
- Connect the control harness to the radiator.
Tools required
- WD40 lubricant Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 110 inch-lbs (12 N·m) hose clamps
Full service-parts list: 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.