Cummins/Onan — Priming the Fuel System - High-Pressure Side
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKAA, Cummins/Onan MDKAB, Cummins/Onan MDKAL
Before you start
- High pressure oil spray can penetrate skin, leading to possible blood poisoning
Procedure
- Loosen high pressure fittings at nozzles using two wrenches
- Crank genset until fuel appears at loosened fittings, snug up each fitting
- Shut down engine and torque fittings to 19-25 lb-ft (25-34 N-m)
Tools required
- flare-nut wrenches Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Torque 19-25 lb-ft (25-34 N-m)
Full service-parts list: Cummins/Onan MDKAA →, Cummins/Onan MDKAB →, Cummins/Onan MDKAL →
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.