TM 10-3930-641-20
TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE (CONT)
18. WHITE OR BLUE SMOKE FROM EXHAUST
Step 1. Inspect for engine oil past specified level.
Drain engine oil to specified level.
Step 2. Excessive oil consumption caused by engine running rough or misfiring.
Inspect air cleaner for obstructions.
Service. (See page 2-198.)
HYDRAULIC SYSTEM
1. BOUNCY ACTION OR NO MOVEMENT OF HYDRAULIC SYSTEM WHEN TRYING TO LIFT A LOAD
Test for air in hydraulic system.
Bleed air from system by using bleed screw at top of lift cylinder. (See page 2-496. )
2. CARRIAGE WILL NOT LOWER CORRECTLY
Step 1. Inspect mast sliding blocks, rollers, and chains for correct lubrication.
Lubricate components as necessary. (See LO 10-3930-641-12.)
Step 2. Inspect lift line for restrictions.
Clean/replace.
Step 3. Check control linkage for proper adjustment. (See page 2-497.)
3. HYDRAULIC SYSTEM WILL NOT HOLD A LOAD
Inspect lines and fittings for leaks.
Tighten.
