TM 10-3930-675-20-1
0047 00-2
TOPHANDLER TWISTLOCKS AND FORKLIFT SENSOR TROUBLESHOOTING - CONTINUED
0047 00
Table 1. Error Code 212 - Tophandler Left Twistlocks Indication Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 212 - Tophandler Left Twistlocks
Indication Failure - Continued
3. Remove tophandler junction
box cover and ensure that
circuit breakers F41, F42, and
F43 are not tripped. Check
wire from circuit breaker F42
to
connector
X181
for
damage.
a. Reset circuit breakers as
required (WP 0076 00).
b. Replace damaged connectors
(WP 0111 00).
4. Remove junction box X183
cover (located on left end of
tophandler)
and
check
voltage between connector
X183 pin 3 and pin 4. Voltage
should be 20-25V.
a. If voltage is
present,
perform functional check
of left side twistlock
proximity
switches
by
placing a metal object
within 5 mm of tip of each
switch. Proximity switch
indicator
light
should
illuminate.
If indicator lights do not
illuminate, replace proximity
switch (WP 0074 00).
b. If
indicator
lights
illuminate, check voltage at
junction box X183 pin 5
(for unlocked) and pin 6
(for locked).
If voltage is not present, replace
proximity switch (WP 0074 00).
5. Remove cover from junction
box X182 (located on top of
tophandler). Check voltage
between junction box X182
pin 4 and pin 5. Voltage
should be 20-25V.
If voltage is not as specified,
repair or replace cable from
junction box X183 to connector
X182 (WP 0111 00).
6. Check continuity between
junction box X182 pin 8 and
junction box X183 pin 5 and
between junction box X182
pin 9 and junction box X183
pin 6.
If continuity is not present,
repair or replace cable from
junction box X183 to connector
X182 (WP 0111 00).
