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TM 9-2320-364-20-3
2-2744
11 LOSS OF CRANE FUNCTIONS (SWING, TELESCOPE, BOOM AND HOIST) (CONT).
13.
Repair white wire
(see schematic
Fig 2-58) or notify DS
Maintenance.
Verify repair, go to
Step 15 of this Fault.
YES
NO
WINCH/CRANE switch in
CRANE position.
Main hydraulic reservoir full.
Outriggers operate.
Outriggers down with weight off
truck suspension.
Crane tubes and hoses OK.
Accumulator and tube OK.
Hose 2776 OK.
White jumper wire from terminal
19 to 20 OK.
Outrigger proximity switch (RH)
OK.
Outrigger proximity switch (LH)
OK.
Red wire from terminal 5 to
control lockout relay OK.
Black wire from crane terminal 1
to control lockout relay OK.
Green wire from control lockout
relay to black wire OK.
Control lockout relay OK.
Blue wire from control lockout
relay to crane terminal 8 OK.
Crane system hydraulic
pressure valve harness
connector white wire faulty.
Crane system hydraulic
pressure valve harness
connector black wire faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If connector white wire is loose,
faulty or shorted to black wire,
22 to 28 vdc will not be input to
system hydraulic pressure
valve.
WARNING
Is continuity measured
between system hydraulic
pressure valve harness
connector, terminal 1 and
crane junction box,
terminal 8?
Read WARNING
on Page 2-2745
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