Hyundai 35DS-7 Operation Manual page 231

2. TROUBLESHOOTING
1) MAST
Problem
Forks fail to lower.
Fork fails to elevate
Slow lifting speed and
insufficient handling capacity.
Mast fails to lift smoothly.
Abnormal noise is produced
when mast is lifted and lower-
ed.
Abnormal noise is produced
during tilting operation.
c c ause
Deformed mast or carriage.
Faulty hydraulic equipment.
Deformed mast assembly.
Faulty hydraulic equipment.
Deformed mast assembly.
Deformed masts or carriage.
Faulty hydraulic equipment.
Damaged load and side rollers.
Unequal chain tension between
LH & RH sides.
LH & RH mast inclination angles
are unequal. (Mast assembly is
twisted when tilted)
Broken load roller bearings.
Broken side roller bearings.
Deformed masts.
Bent lift cylinder rod.
Deformed carriage.
Broken sheave bearing.
Insufficient lubrication of anchor
pin, or worn bushing and pin.
Bent tilt cylinder rod.
8-6
Remedy
Disassemble, repair or replace.
See troubleshooting hydraulic pump
and cylinders in section 6, hydraulic
system.
Disassemble mast and replace
damaged parts or replace complete
mast assembly.
See troubleshooting hydraulic pump
and Cylinders in section 6, hydraulic
system.
Disassemble mast and replace
damaged parts or replace complete
mast assembly.
Disassembly, repair or replace.
See Troubleshooting Hydraulic
Cylinders pump and control valve in
section 6, hydraulic system.
Replace.
Adjust chains.
Adjust tilt cylinder rods.
Replace.
Replace.
Disassemble, repair or replace.
Replace.
Replace.
Replace.
Lubricate or replace.
Replace.