TM 9-4940-568-34
2-29
Table 2-7. Crane Troubleshooting (CONT).
(1)
Connect four white wires on crane
junction box, terminal 18 with two
screws.
(2)
Disconnect jumper wire from crane
junction box, terminals 1 and 19.
(3)
Turn ON crane main POWER
switch.
(4)
Attempt to operate boom and hoist
functions using BOOM,
TELESCOPE and HOIST control
levers.
(a) If functions do not operate,
fault not corrected. Notify
Supervisor and perform
Steps (5) through (13) below.
(b) If functions operate, fault has
been corrected. Perform
Steps (5) through (13) below.
Continued on next page.
VERIFY REPAIR
Remove all jewelry such as rings, dog tags,
bracelets, etc. If jewelry or tools contact
positive electrical circuits a direct short
may result. Damage to equipment, injury or
death to personnel may result.
Do not stand under crane. Mechanical failure
and operator error can cause injury or death
to personnel.
SCREW
TERMINAL 18
TERMINAL 19
TERMINAL 1
COVER
CLIP
JUNCTION
BOX
CRANE POWER
SWITCH
BOOM
CONTROL LEVER
HOIST
CONTROL LEVER
TELESCOPE
CONTROL LEVER
