Gm Engine Fuel System Repair; Propane Fuel System Pressure Relief; Propane Fuel System Leak Test - JLG 400S Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE

3.25 GM ENGINE FUEL SYSTEM REPAIR

THE PROPANE FUEL SYSTEM OPERATES AT PRESSURES UP TO 312 PSI (21.5

BAR). TO MINIMIZE THE RISK OF FIRE AND PERSONAL INJURY, RELIEVE THE

PROPANE FUEL SYSTEM PRESSURE (WHERE APPLICABLE) BEFORE SERVICING

THE PROPANE FUEL SYSTEM COMPONENTS.

To relieve propane fuel system pressure:

1. Close the manual shut-off valve on the propane fuel

2. Start and run the vehicle until the engine stalls.

3. Turn the ignition switch OFF.

RESIDUAL VAPOR PRESSURE WILL BE PRESENT IN THE FUEL SYSTEM. ENSURE

THE WORK AREA IS WELL VENTILATED BEFORE DISCONNECTING ANY FUEL

NEVER USE AN OPEN FLAME OF ANY TYPE TO CHECK FOR PROPANE FUEL SYS-

Always inspect the propane fuel system for leaks after per-

forming service. Check for leaks at the fittings of the serviced

or replaced component. Use a commercially available liquid

leak detector or an electronic leak detector. When using both

methods, use the electronic leak detector first to avoid con-

tamination by the liquid leak detector.