MAINTENANCE
69
810 Gas/LPG 330160 (3--07)
FUEL FILTER (LPG)
The fuel filter traps fuel contaminants. The fuel
filter element is located inside the fuel lockoff
valve on the LPG convertor going into the
electrical fuel injection system.
ELECTRONIC PRESSURE REGULATOR (LPG)
(For machines serial number 004500 and
above)
Remove the sensor and drain the oil from the
LPG electronic pressure regulator after every 100
hours of operation.
FOR SAFETY: When servicing machine,
keep flames and sparks away from fuel
system service area. Keep area well
ventilated.
ELECTRONIC FUEL INJECTION (GM)
The electronic fuel injection system requires no
adjustment.
The fuel injection system is equipped with a
“manifold absolute pressure sensor” (MAP
Sensor). The MAP sensor senses barometric
pressure and automatically corrects the fuel
system calibration for changes in altitude. This
means the air/fuel mixture will always be
optimized, regardless of elevation (or barometric
pressure), however, the engine will still lose 3.5%
power for every 1000 ft increase in elevation.
The Idle speed on machines serial number
024999 and below is set at 1350 + 50 rpm
The Idle speed on machines serial number
025000 and above is set at 950 + 50 rpm
Replace the fuel filter element on the GM engines
serial number 004000 and above after every 400
hours of operation.
SPARK PLUGS
Clean or replace, and set the gap of the spark
plugs every 400 hours of operation.
The proper spark plug gap for the FORD and GM
engines are 1 mm (0.042 in).
CRANKCASE VENTILATION SYSTEM
Replace the PCV valve every 400 hours of
operation. Clean the crankcase ventilation hoses,
tubes, and fittings every 800 hours of operation.
