Cummins/Onan — Install Vent Lines & Low Coolant Level Sensor/Cable
Installation · Vent lines and LCL sensor
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
Before you start
- Do not use Teflon tape on sensor threads.
Procedure
- Connect the vent line hoses; be sure to install the check valve as shown.
- Thread the low coolant level sensor into the radiator using pipe thread sealant (do not use Teflon tape).
- Connect the harness lead of the LCL sensor to connector located by the engine coolant filters.
- Secure the vent pipes and harness to the radiator tubes with cable ties.
- Connect the return fuel cooler hose between the radiator and the engine fuel return line.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.