TM 9-2320-366-34-1
2-1091
THREE WAY CONTROL VALVE ASSEMBLY FLOW TEST
(9) Stow MHC (TM 9-2320-366-10-1).
(10) Position MHC power switch to OFF (TM
9-2320-366-10-1).
(11) Position PTO switch to off (TM
9-2320-366-10-1).
(12) Shut down engine (TM 9-2320-366-10-1).
(13) Disconnect hydraulic tester, hoses and adapters.
(14) Connect hose to port B.
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.
(1) Place drain pan under vehicle.
(2) Disconnect hose from port B of mast erection
control valve in three way (lower) control valve
assembly.
(3) Connect hydraulic tester between hose and port
B 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) Erect mast (TM 9-2320-366-10-1).
(a) While erecting mast observe flow of about
1 gpm.
(b) If flow is low, replace control valve in three
way (lower) control valve assembly.
