TM 9-2320-366-34-1
2-1049
CONTROL VALVE FLOW TEST
NOTE
Crane must be fully erected in
order to perform flow and
pressure test.
NOTE
If boom swings right OK but will not
swing left: substitute port B for port A,
in steps (1), (2), (14), and (15), and
operate swing control CCW, in step (9).
(1) Place drain pan under vehicle.
(2) Disconnect hose from port A of boom swing
hose located underneath wrecker.
(3) Connect hydraulic tester between hose and port
A with test hoses and adapters.
(4) Start engine (TM 9-2320-366-10-1).
(5) Position PTO switch to on (TM
9-2320-366-10-1).
(6) Increase engine rpm to 1250-1450 rpm (TM
9-2320-366-10-1).
(7) Position MHC power switch to ON (TM
9-2320-366-10-1).
(8) Operate swing control CW (TM
9-2320-366-10-1).
(9) Check for reading of 8-9 gpm (30-34 lpm) at
1400 psi (9653 kPa).
(10) If flow reading is not 8-9 gpm (30-34 lpm),
replace control valve (para 16-59).
(11) If pressure is not 1400 psi (9653 kPa), replace
hydraulic orbit motor (para 16-55) or cross
relief valve assembly (para 16-54).
(12) Stow MHC (TM 9-2320-366-10-1).
(13) Position MHC power to OFF (TM
9-2320-366-10-1).
(14) Position PTO switch to off (TM
9-2320-366-10-1).
(15) Shut down engine (TM 9-2320-366-10-1).
(16) Disconnect hydraulic tester, hose and adapters.
(17) Connect hose to port A.
(18) Remove drain pan from under vehicle.
WARNING
Wear approved eye protection when performing
pressure checks. Failure to comply may result
in oil getting into eyes. If oil contacts eyes, seek
medical attention immediately.
Drop hydraulic pressure to zero before
disconnecting any hydraulic hose, tube, or fitting.
Failure to comply may result in injury to personnel.
Fuel and oil are slippery and can cause falls.
Wipe up spilled fuel or oil with rags. Failure
to comply may result in injury to personnel.
