Takeuchi TB 250, Workshop Manual

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4-157
4
TRAVEL MOTOR
DISASSEMBLY AND ASSEMBLY
Inspection and adjustment
Use limit for parts
Part Area checked Judgment criteria Treatment
Floating seal Sliding surface Abnormal scratches, wear or scorch-
ing on the surface Replace
Angular bearing Rolling surface Abnormal scratches, wear or flaking
on the ball or race. Replace
Planetary gear Gear tooth surface Abnormal scratches, wear or flaking
of the tooth surface (if pitting covers
10% or more of the area engaging
with the tooth surface). Replace
Inner race Rolling surface Abnormal scratches, wear or flaking
on the rolling surface
Replace
Needle Needle surface Abnormal scratches, wear or flaking
on the surface Replace
Thrust washer Sliding surface Abnormal scratches, wear or scorch-
ing on the surface Replace
Housing, sun gear,
drive gear Gear tooth surface Abnormal scratches, wear or flaking
of the tooth surfaces (if pitting cov-
ers 10% or more of the area engag-
ing with the tooth surface). Replace
Thrust plate Sliding surfaces Abnormal scratches, wear or scorch-
ing on the surface Replace
O-ring –– –– Replace
Shaft Oil seal surface Abnormal scratches, wear or scorch-
ing on the surface Replace
Ball bearing Sliding surfaces Abnormal scratches or flaking on the
ball or race. Replace
Oil seal –– –– Replace
Swash plate Sliding surface with the piston as-
sembly Abnormal scratches (0.02 mm or
more), wear or scorching on the sur-
faces Replace
Cylinder block Cylinder block-to-piston assembly
clearance 0.04 mm or more Repair by lapping
(#1000) or replace
both cylinder block
and piston assembly.
Sliding surface with the valve plate Abnormal scratches (0.02 mm or
more), wear or scorching on the sur-
faces
Piston assembly Piston assembly-to-cylinder block
clearance 0.04 mm or more
Sliding surface with the swash plate Abnormal scratches (0.02 mm or
more), wear or scorching on the sur-
faces
Play of piston shoe 0.04 mm or more Replace
Valve plate Sliding surface with the cylinder
block Abnormal scratches (0.02 mm or
more), wear or scorching on the sur-
faces Repair by lapping
(#1000) or replace
both cylinder block
and piston assembly.