Cummins/Onan — Testing Low-Pressure LPG Shutoff E4
Testing & diagnosis · LPG shutoff solenoid
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HGJAA, Cummins/Onan HGJAB, Cummins/Onan HGJAC, Cummins/Onan HGJAD, Cummins/Onan HGJAE, Cummins/Onan HGJAF
Before you start
- LPG is flammable and explosive; keep ignition sources away
Procedure
- Connect valve inlet to air pressure regulated to not more than 14 in WC (35 cm).
- Disconnect the outlet hose.
- Use soap bubble to check for leakage.
- Replace solenoid if it leaks.
- Disconnect solenoid leads and connect to 12 V battery.
- Replace solenoid if it does not open.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Test pressure not more than 14 in WC (35 cm)
Full service-parts list: Cummins/Onan HGJAA →, Cummins/Onan HGJAB →, Cummins/Onan HGJAC →, Cummins/Onan HGJAD →
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.