9-10
MAST
MAST
1)
1)
Problem
Problem
Cause
Cause
Remedy
Remedy
Forks fail to lower.
·
Deformed mast or carriage.
·
Disassemble, repair or replace.
Fork fails to elevate
·
Faulty hydraulic equipment.
·
Deformed mast assembly.
·
See troubleshooting hydraulic pump
and cylinders in section 6, hydraulic
system.
·
Disassemble mast and replace
damaged parts or replace complete
mast assembly.
Slow lifting speed and
insufficient handling capacity.
·
Faulty hydraulic equipment.
·
Deformed mast assembly.
·
See troubleshooting hydraulic pump
and cylinders in section 6, hydraulic
system.
·
Disassemble mast and replace
damaged parts or replace complete
mast assembly.
Mast fails to lift smoothly.
·
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)
·
Disassembly, repair or replace.
·
See Troubleshooting Hydraulic
Cylinders, pump and control valve in
section 6, hydraulic system.
·
Replace.
·
Adjust chains.
·
Adjust tilt cylinder rods.
Abnormal noise is produced
when mast is lifted and lowered.
·
Broken load roller bearings.
·
Broken side roller bearings.
·
Deformed masts.
·
Bent lift cylinder rod.
·
Deformed carriage.
·
Broken sheave bearing.
·
Replace.
·
Replace.
·
Disassemble, repair or replace.
·
Replace.
·
Replace.
·
Replace.
Abnormal noise is produced
during tilting operation.
·
Insufficient lubrication of anchor
pin, or worn bushing and pin.
·
Bent tilt cylinder rod.
·
Lubricate or replace.
·
Replace.
7. MAST AND FORK
7. MAST AND FORK
