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TM 9-2320-364-20-3
2-2730
11. LOSS OF CRANE FUNCTIONS (SWING, TELESCOPE, BOOM AND HOIST) (CONT).
6.
Replace crane
outrigger right
proximity switch
(Para 7-43).
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)
faulty.
Outrigger proximity switch (LH)
faulty.
Red wire from terminal 5 to
control lockout relay faulty.
Black wire from crane terminal 1
to control lockout relay faulty.
Green wire from control lockout
relay to black wire faulty.
Control lockout relay faulty.
Blue wire from control lockout
relay to crane terminal 8 faulty.
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
Voltage test.
STE/ICE-R #89.
If outrigger proximity switch is
faulty, 22 to 28 vdc will not be
input to system hydraulic
pressure valve.
WARNING
Are 22 to 28 vdc measured at
crane junction box, terminal 4
with ENGINE switch ON and
crane POWER switch in ON
position?
Read WARNING
on Page 2-2731
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