Maxon RA-45 - Troubleshooting Chart; Platform Movement and Motor Issues

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713
34
TROUBLESHOOTING
P
LATFORM 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. 34-1).
Verify that full battery voltage
is at “B”. Recharge the battery
if voltmeter indicates less than
12.6 volts dc.
2. Check for structural damage or
poor lubrication. Replace worn
parts.
TERMINAL “B”
BATTER
Y (+)
TERMINAL “D”
COIL DRIVE
TERMINAL “C”
GROUND (-)
POWER UNIT
FIG. 34-1
TERMINAL “A”
LOAD
VALVE “C”
LOWERING
SOLENOID V
ALVE
STARTER
SOLENOID
3. Check if the “D” terminal and
“A”
(lowering) solenoid valve
are getting battery voltage (FIG.
34-1). Connect voltmeter nega-
tive (-) lead to ground (-) wires
connection on pump and posi-
tive (+) lead to the “D” terminal
(FIG. 34-1). Hold control switch
in the “LOWER” position. Then,
connect voltmeter (+) lead to
(+) terminal on the “A” (lower-
ing) solenoid valve (FIG. 34-1).
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, battery
cable, ground wire connections
in pump assembly, and pump
motor.