TM 5-5420-234-14&P
5-2. DIRECT SUPPORT TROUBLESHOOTING (continued).
2.
HOOK ARM DOES NOT LOAD (continued).
2.
KNOWN INFO
TEST OPTIONS
Unit troubleshooting
Are 3,1003,300 psi
Hook Arm Load Pressure
completed.
present at the hook arm
Test.
Other LHS functions OK.
manifolds during load-
REASON FOR QUESTION
ing?
POSSIBLE PROBLEMS
If the correct hydraulic
Directional control valve
pressure is measured at
faulty.
the hook arm hydraulic
Hook arm manifold
cylinders, the control
counterbalance valve(s)
portion of the hydraulic
faulty.
circuit is OK.
Replace directional
control valve (para
NO
YES
5-12
