G424 Service Manual Maintenance20
Replace Gasoline Fuel Filter
(Gasoline Truck and Dual
Fuel Truck)
Fuel leaked or spilled onto hot surfaces or
electrical components can cause a fire.
Turn the disconnect switch OFF if fitted or
disconnect the battery when changing fuel
filters
1. Raise the hood and seat assembly.
2. Loosen Bolt(1) and clamps(2)(3).
3. Replace old fuel filter with new filter.
4. Fasten Bolt(1) and clamps(2)(3).
Inspect Gasoline Carburetor
See, gasoline carburetor in Gasoline fuel system
section.
Inspect Pressure
Regulator/Vaporizer
See, pressure regulator/vaporizer in LP fuel system
section.
Inspect LP Mixer
(Standard LP Truck)
See, LP mixer in LP fuel system section.
Inspect Variable Venturi
Air/Fuel Mixer
(Low Emission LP Truck)
See, Variable Venturi Air/Fuel Mixer in LP fuel
system(Low emission version) section.
Inspect Complete Exhaust
System for Leaks, Damage
• Perform visual inspection of exhaust system.
• Repair any/all leaks found.
Engine Control Unit(ECU)
and others
(Low Emission LP Truck)
The commander, oxygen sensor and vacuum control
solenoid are not serviceable. If faulty, they must be
replaced. See Trouble Shooting Section
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