Maxon MXT-25, Maintenance Manual

Page: 54 / 61

1
1921 Slauson
A
ve. Santa Fe Springs, CA. 90670 (800) 227-41
16 F
AX (888) 771-7713
54
PLATFORM BEGINS TO LOWER ON LH SIDE,
BUT WILL NOT LOWER ON RH SIDE
1.
Check for battery voltage at the hydraulic lock
as follows. Disconnect wiring harness from coil
on the lock valve
(FIG. 54-1)
. Then, connect
voltmeter
(+)
and
(-)
leads to connector con-
tacts 1 and 2 on the wiring harness
(FIG. 54-2)
.
Hold control switch in the
DOWN
position just
long enough to get a reading. Voltmeter should
read at least 10.5 volts DC, or 22 volts DC for
24 volt system. If voltage reading is lower or
“0”, go to step 4.
MEASURING VOLTAGE AT LOCK VALVE
WIRING HARNESS CONNECTOR
FIG. 54-2
1 (+)
2 (-)
WIRING
HARNESS
CONNECTOR
LOCK VALVE WIRING
HARNESS CONNECTOR
FIG. 54-1
CONNECTOR
WIRING
HARNESS
1
2
MEASURING COIL RESISTANCE
FIG. 54-3
CONNECTOR
2
. Connect ohmmeter
(+)
and
(-)
leads
to connector contacts 1 and 2 on the
coil
(FIG. 54-3)
. Ohmmeter should
read about 7 to 8 ohms, or 30 ohms
for 24 volt system
(TABLE 40-1)
.
If ohms reading is higher or lower, re-
place the coil on hydraulic lock valve.
COIL
LOCK VALVE
COIL