LEFT AND/OR RIGHT HOIST CYLINDERS DO NOT EXTEND OR RETRACT - continued

TM 10-3930-673-20-1

NOTE

Relieve accumulator pressure before removing pressure hose on hydraulic joystick.

HYDRAULIC JOYSTICK CONTROL VALVE

PRESSURE TEST

(1) Place hydraulic joystick in neutral

position. Attach 3-way gage and check

pressure at "P" port on joystick.

(a) If hydraulic oil pressure is null go to

Step (2) of this fault.

(b) If not, replace joystick control valve

(Para 18-11).

(2) Place hydraulic joystick in raise

position and then in lower position.

Check pressure at input lines to main

TR01813

control valve.

(a) If hydraulic oil pressure is at 1700

to 1800 psi (11721 to 12411 kPa),

go to Step 7 of this fault.

(b) If hydraulic oil pressure is not at

1700 to 1800 psi (11721 to 12411

kPa), shut down engine (TM 10-

3930-673-10) and replace the

joystick control valve.

TR01258

Change 1

2-811