Maxon GPTLR-44 - Disconnecting Battery Power; Supporting Liftgate with Floor Jack

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713
52
RELIEF VALVE PRESSURE ADJUSTMENT - GRAVITY DOWN
TROUBLESHOOTING - Continued
1. Lower platform to the ground.
RELIEF VALVE
COVER
2. Remove plug from gauge port G (FIG. 52-1).
Attach 0-4000 PSI pressure gauge to the
gauge port (FIG. 52-1).
ADJUSTING RAISING RELIEF VALVE
(GRAVITY DOWN POWER UNIT)
FIG. 52-2
RELIEF VALVE
ADJUST SCREW
INSTALLING PRESSURE GAUGE
(GRAVITY DOWN POWER UNIT)
FIG. 52-1
PRESSURE
GAUGE
PRESSURE
GAUGE
NOTE: The relief valve pressure is set at the factory; however, if a pressure check
shows incorrect reading, use the following procedure to set the pressure to
the correct reading.
RESERVOIR
(PUMP INLET FILTER INSIDE)
5. After adjustments are complete, remove
gauge (FIG. 52-1). Then, reinstall relief
valve cover (FIG. 52-2).
3. Remove cover for access to relief valve
(FIG. 52-2).
4. Hold the control switch in the UP position.
Slowly adjust the relief valve until the gauge
reads 2750 PSI (FIG. 52-2).
RESERVOIR
(PUMP INLET FILTER INSIDE)
PORT G