Maxon TE-250C, Maintenance Manual

Page: 44 / 48

1
1921 Slauson
A
ve. Santa Fe Springs, CA. 90670 (800) 227-41
16 F
AX (888) 771-7713
44
ADJUSTMENT
COVER
LIFTGATE WILL NOT LIFT RATED CAPACITY
3.
Check the 3250 PSI relief valve as
follows. With platform on the ground,
remove plug from hand pump port
(FIGS. 44-1 and 44-2)
. Install 0-4000
PSI pressure gauge in the hand pump
port
(FIGS. 44-1 and 44-2)
. Remove
cover for access to relief valve. Hold the
control switch in the “
RAISE
” position.
Adjust the relief valve until the gauge
reads 3250 PSI
(FIGS. 44-1 and 44-2)
.
Remove gauge and reinstall plug in the
port. Then, reinstall relief valve cover.
4.
Check if pump relief valve is dirty. Clean or
replace relief valve, if necessary.
1.
Use voltmeter to verify the battery voltage is 12.6
volts or more under load from pump motor.
2.
Check for structural damage or lack of lubrica-
tion. Replace worn parts.
TROUBLESHOOTING
ADJUSTMENT
COVER
HAND PUMP
PORT
Keep dirt, water and other contaminants
from entering the hydraulic system. Be-
fore opening the hydraulic fl uid reservoir
fi ller cap, drain plug and hydraulic lines,
clean up contaminants that can get in
the openings. Also, protect the openings
from accidental contamination during
maintenance.
CAUTION
ADJUSTING RAISING RELIEF VALVE
(GRAVITY DOWN POWER UNIT)
FIG. 44-1
ADJUSTING RAISING RELIEF VALVE
(POWER DOWN POWER UNIT)
FIG. 44-2
PRESSURE
GAUGE
RELIEF VALVE
ADJUST SCREW
HAND PUMP
PORT
RELIEF VALVE
ADJUST SCREW
PRESSURE
GAUGE