TM 10-3930-641-20
TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM (CONT)
4. HYDRAULIC SYSTEM WILL NOT LIFT LOAD
Step 1. Inspect lines and fittings for leaks.
Replace/tighten.
Step 2. Inspect mast sliding blocks, rollers, and chains for correct lubrication.
Lubricate components as necessary. (See LO 10-3930-641-12.)
Step 3. Check control linkage for proper adjustment. (See page 2-502.)
5. LIFT OR TILT CYLINDERS DO NOT HOLD POSITION WITH HYDRAULIC CONTROL LEVERS IN NEUTRAL CONDITION
Inspect lines and fittings for leaks.
Tighten.
6. MAST TILTS TOO SLOWLY
Step 1. Inspect tilt cylinder packing nut for tightness.
Loosen nut.
Step 2. Check control linkage for proper adjustment. (See page 2-497.)
7. NOISY HYDRAULIC PUMP
Step 1. Inspect oil level.
Add oil. (See LO 10-3930-641-12.)
Step 2. Inspect filter for dirt.