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TM 9-2320-364-20-3
2-2722
11. LOSS OF CRANE FUNCTIONS (SWING, TELESCOPE, BOOM AND HOIST) (CONT).
2.
Tighten loose fittings
or replace tube and/or
accumulator
(Para 18-10 and
20-3). 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 or tube faulty.
Hose 2776 faulty.
White jumper wire from terminal
19 to 20 faulty.
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
Visual inspection.
Leaking accumulator or tube to
accumulator will bleed off
pressure to four-valve bank.
WARNING
Is accumulator and tube from
four valve bank to
accumulator free of damage,
crimps, and leaks?
Read WARNING
on Page 2-2723
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