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TM 9-2320-364-20-3
2-2740
11 LOSS OF CRANE FUNCTIONS (SWING, TELESCOPE, BOOM AND HOIST) (CONT).
11.
Control lockout
relay faulty.
Notify DS
Maintenance.
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 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 control lockout relay is faulty,
22 to 28 vdc will not be input to
system hydraulic pressure
valve.
WARNING
Are 22 to 28 vdc measured at
control lockout relay blue
wire with ENGINE switch ON
and crane POWER switch in
ON position?
Read WARNING
on Page 2-2741
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