Hyundai r35z-7 Workshop Manual page 245

3. SWING MOTOR
Replace the parts referring to the following table.
1) MOTOR
Part name
Piston assembly (2-13)
Thrust plate (2-4)
Retainer holder (2-11)
Retainer plate (2-12)
Brake piston (2-15)
Valve plate (2-24)
Cylinder block (2-5)
Disc (2-14)
Ball bearings (2-2) (2-22)
Spring (2-7)
O-rings (2-16), (2-17), (2-20), (2-26),
(2-42), (2-44), (2-46)
1. The sliding parts are scratched deeply or the sliding surface has become
rough.
2. The clearance between the piston and the cylinder block bore is too large.
Upper limit of diameter clearance : 0.04mm.
3. The piston shoe ball is loose excessively.
Max. clearance (movement) : 0.4 mm
1. The sliding parts are scratched deeply or the sliding surface has become
rough.
1. The sliding parts are scratched deeply or the sliding surface has become
rough.
2. The meshing surface is worn excessively or cut.
1. The disc (friction material) is scratched deeply or peeled.
2. The meshing surface is worn excessively or cut.
1. The rolling contact surface has been flaked or peeled.
2. The rolling contact surface is dented.
3. Bearing rotation produces abnormality (abnormal noise, irregular rotation).
1. The spring is broken or deformed excessively.
1. Damage that is likely to cause oil leak, damage that is likely to deteriorate
the sealing or premanent deformation is noticed.
6-24
Service criteria