UNABLE TO ROTATE LOAD (ALL OTHER FUNCTIONS NORMAL)

TM 10-3930-638-24&P

3-29. HYDRAULIC LIFT SYSTEM TROUBLESHOOTING (cont)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

7. UNABLE TO ROTATE LOAD (ALL OTHER FUNCTIONS NORMAL) (cont)

Step 4. Crack (loosen) fittings shown below.

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 and check if hydraulic oil flows from fittings; place

ROTATE control lever in CW position and check if hydraulic oil flows from fittings.

a. If hydraulic oil does not flow from fittings, remove and repair control valve (para 3-30a).

b. If hydraulic oil flows from fitting, remove and repair rotation cylinder assembly (para 3-30d)

(tighten fittings loosened above).

8. ROTATION OPERATION SLUGGISH

NOTE

After completion of each check, lower forks until resting on ground.

Then, turn engine off.

Step 1. Check pressure relief valve setting (para 2-48b(2), steps 20 through 22).

a. If pressure relief valve setting is not correct, adjust for proper setting (para 2-48b(2), step 23).

b. If pressure relief valve setting is okay, proceed to step 2.