ROTATION OPERATION SLUGGISH

TM 10-3930-638-24&P

3-29. HYDRAULIC LIFT SYSTEM TROUBLESHOOTING (cont)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

8. ROTATION OPERATION SLUGGISH (cont)

Step 2. Start engine and operate at idle speed.

Place LIFT control lever in RAISE position until forks are three feet from ground.

Place ROTATE control lever in CCW position until forks are in extreme CCW position.

Turn engine off and operate control levers several times to relieve hydraulic pressure.

Disconnect and cap hose fitting connected to rod end of rotation cylinder assembly.

CAUTION

Don't place ROTATE control lever in CW position in following steps; hydraulic

oil will flow out of disconnected hose fitting.

Start engine and operate at idle speed.

Place ROTATE control lever in CCW position and hold while an assistant checks for hydraulic oil

leakage at rotation cylinder assembly port from which fitting was disconnected.

a. Remove and repair rotation cylinder assembly (repair or replace piston assembly) (para 3-30d)

if hydraulic oil leakage is observed.

b. If hydraulic oil leakage is not observed, remove and repair control valve (para 3-30a).

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