Specifications

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
96
PLATFORM WILL NOT LOWER, LOWERS TOO SLOWLY, OR TOO QUICKLY
1. Connect voltmeter (+) lead to
motor solenoid terminal “B” and
the (-) lead to the ground wires
connection on pump (FIG. 96-
1). Verify that full battery voltage
is at “B”. Recharge the battery
if voltmeter indicates less than
12.6 volts dc.
3. Check if the “D” terminal and “A”
(lowering) solenoid valve are getting
battery voltage (FIG. 98-1). Connect
voltmeter negative (-) lead to ground
(-) wires connection on pump and
positive (+) lead to the “D” terminal
(FIG. 96-1). Hold control switch in
the
“LOWER” position. Then, connect
voltmeter (+) lead to (+) terminal on
the “A” (lowering) solenoid valve
(FIG. 96-1). If voltmeter shows a
much lower reading than +12.6 volts
dc or a reading of 0 volts, check for
faulty control switch and wiring, bat-
tery cable, ground wire connections
in pump assembly, and pump motor.
2. Check for structural damage or poor
lubrication. Replace worn parts.
TROUBLESHOOTING
GRAVITY DOWN POWER UNIT
FIG. 96-1
VALVE “A”
LOWERING
SOLENOID VALVE
TERMINAL “A”
LOAD
TERMINAL “B”
BATTERY (+)
TERMINAL “D”
SWITCHED BATTERY (+)
STARTER
SOLENOID
TERMINAL “C”
GROUND (-)
VALVE “A”
LOWERING
SOLENOID VALVE
TERMINAL “A”
LOAD
TERMINAL “B”
BATTERY (+)
TERMINAL “D”
SWITCHED BATTERY (+)
STARTER
SOLENOID
TERMINAL “C”
GROUND (-)
POWER DOWN POWER UNIT
FIG. 96-2