SP000032
Page 19
Travel Motor
Number of rotation is below specification.
Insufficient rotation. Lack of incoming oil. Check hydraulic circuits up to motor.
Too high oil temperature. Decrease oil temperature.
Too much leakage. Replace or repair faulty parts.
Each way worn or broken that tilting
angle not switched (small to large
angle).
- Orifice at small tilting side blocked.
- Leakage at small tilting chamber
(excessive clearance in shaft
casing, swash piston, or stopper L).
Replace or repair faulty parts.
- Wash or replace orifice.
- Replace faulty parts.
Driving power is below specification.
Low-pressure. Low set pressure in relief valve. Adjust pressure.
Brake released but weak
driving force.
Sticking or abnormal wear of
slideways.
Replace or repair slideway.
Hard to control brake.
Low brake torque. Wear of friction and/or separation
plates.
Replace worn parts.
Damage of brake spring. Replace brake spring.
No brake operation. Sticking of inner brake parts. Replace parts.
Tilting angle not switched.
Tilting angle is not switched. Orifice at the tilting channel of shaft
casing blocked.
Wash or replace orifice.
Tilting angle adjustment spool (531)
and case stuck.
Replace faulty parts.
Leakage due to excessive
clearance among shaft casing,
swash piston, and stopper.
Outer diameter of swash piston and
spheral face stuck.
High-pressure select valve in valve
casing not operating.
Oil leakage.
Leakage from oil seal (491). Oil seal or shaft slidway damaged. Replace damaged parts and remove any
foreign substance.
High-pressure in case. Check drain line.
Leakage from assembled
parts.
O-ring damaged. Replace O-ring.
Volt or plug loosed. Tighten with specified torque.
Main ways stuck.
Piston and shoe. Overload rotation of motor.
Increase of temperature.
Insufficient intensity of illumination
on slideway.
Improper oil or lubrication.
Check the operation of relief valve.
Check circuits.
Repair or replacement of faulty parts.
Replace oil.
Shoe and swash plate.
Piston and cylinder.
Cylinder and valve plate.
Front plate and spherical
bushing.
Problem Possible Cause Remedy
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