6
4) GATE IS NOT TILTING UP AT GROUND
4.1) Check Battery Power
a) Check voltage at J-1 #3 to Ground J-2 #(-) while pushing lift knobs to engage motor solenoid
b) Check for voltage at small motor solenoid terminals and Ground J-2 #(-) while pushing knobs and
listen for clicking of the motor solenoid
– no voltage or clicking
check wire to motor solenoid
c) Check for voltage across the small motor solenoid terminals with test light while pushing knobs
See a light
power is reaching solenoid.
d) Check for main power at the big solenoid studs, one has voltage; if not check connections to battery
e) Check both big solenoid studs for voltage while pushing the lifting buttons
if not
solenoid is bad
f) Jump large terminals at motor solenoid
- If motor runs
motor solenoid is bad
- If motor does not run
Bad motor or bad ground
- Tap on motor
motor starts running
– bad brushes
4.3) Check motor solenoid power to run the motor
a) Check voltage at J1 #12 and Ground J-2 #(-) while pushing buttons to engage the shift valve at
the pump and motor inside the main tube
b) While pushing the knobs to make the motor run, override shift valve S5 by pushing in at the cab of the
valve
Gate will tilt up, if not
check the valve and look for damaged wire or loose connections
4.4) Check function of shift valve S5 at pump & motor
a) Check voltage at J30 #4 to Ground J-2 #(-) for power supply of the control buttons
b) Check voltage at J30 #5(lift) to Ground J-2 #(-) for lifting signal by pushing up buttons
Signal on J30 #5
control buttons are ok; if no signal check for damaged wire or loose cables
at control buttons or damaged buttons.
4.2) Check function of control buttons(J-30) and hand control(J31)
M
Series
a) Check resettable Circuit Breaker on top of battery
Push Reset Tab back in, if popped out
b) Check fuse on top of battery (qty 1) and
at circuit board (qty 2) inside pump and motor box at mount frame
c) Start van and run engine in fast idle for charging the battery
if liftgate starts working, recharge battery
test battery and replace if necessary
d) Check power on board between J-11 #4 and J-2 (-) with voltmeter by pushing the
up-function knob and hold for 10 sec with gate in upper position(DEADHEAD GATE)
(above 10 Volt is necessary for proper use of liftgate)
less than 10 V; Jump #2 to #4
on J-11
voltage jumps more than 1volt, call Palfinger for assistance
****DO NOT LEAVE JUMPER ON J-11
– GATE MUST BE SHUT OFF WHEN NOT IN USE****
