MP85.9985
10SEP07
625 TROUBLE SHOOTING GUIDE
GLOSSARY
TOUCH PANEL: The touch panel supplies operational information to the control box.
The touch panel receives information from the control box to turn touch panel indicator lights on.
See the CONTROL IDENTIFICATION page for the leveling system touch panel to obtain infor-
mation about the buttons and lights on the touch panel. There is only one cable that plugs into
the touch panel. There is a small pulsating light on the back of the touch panel called the link
light. The link light should pulsate dimly anytime the ignition is on.
WARNING SWITCH: STRAIGHT-ACTING JACK --- This warning switch is a two wire,
normally closed, magnetic switch. The switch mounts in the center of the top of the jack
cylinder. There is a magnet inside the jack rod. When the jack is retracted, the magnet is
close to the switch. This opens the contacts of the switch. When the jack extends between
1/4 and 1/2 inch, the contacts of the switch close. One of the switch wires supplies a ground
to the switch. The other wire carries a ground signal to the control box when the switch is
closed. (Jack extended) The control box then turns on the appropriate red WARNING light
KICK-DOWN JACK --- This warning switch is a two wire switch. Inside the
on the touch panel.
switch are two contacts and a steel ball. The switch mounts to the pivot point of the jack
cylinder at about a 45 degree angle to the cylinder. When the jack is in the vertical position,
the wires of the switch should point to the ground. The steel ball will roll into the contacts,
closing the circuit. One wire supplies a ground to the switch, the other wire carries a ground
signal to the control box when the jack is in the vertical position and the steel ball is shorting
the contacts together. The control box then turns on the appropriate red WARNING light on
the touch panel. When the jack is in the horizontal position, the ball rolls away form the
contacts, opening the circuit. This turns the red WARNING lights off.
CAUTION!
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
HWH COMPUTERIZED LEVELING
R
ON
OFF
AUTO
STORE
MODE
TRAVEL
PARK/
BRAKE
NOT IN
SLOPE
EXCESS
B
A
All three valves have two wires for the coil of the valve. The control box sw12
valve is different making the flow rate of the valve different and non-interchangeable.
The large valves are interchangeable. The small valve orifice size in the end of the
release nut. The small valve has a valve release nut to open the valve manually.
of the large valves has a t-handle to open the valve manually the other has a valve
coil. There are two large valves, 2.25 inches, and a small valve, 1.50 inches. One
the coil of the valve. A spring closes the valve when +12 volts is removed from the
All three valves are normally closed. The valve opens when +12 volts is supplied to
There are three different solenoid valves at this time.
volts to the valves. If a valve will not open with a minimum of 9 volts between the two
SOLENOID VALVE HYDRAULIC:
2.25"
1.50"
WARNING SWITCH:
wires of the valve, with the valve plugged in, the valve needs to be replaced.
If replacing the o-rings for a solenoid valve use only 0-rings supplied by HWH.
2.25"
LARGE
LARGE
SMALL
NUT
"T" HANDLE
NUT
