4-158
4
TRAVEL MOTOR
DISASSEMBLY AND ASSEMBLY
Part Area checked Judgment criteria Treatment
Valve body Sliding surface with the spool Abnormal
scratches, wear or scorch-
ing on the surface
Replace
both valve
body and spool.
Spool Sliding surface with the valve body Abnormal
scratches, wear or scorch-
ing on the surfaces
Sliding surface with the check valve Abnormal
scratches, wear or scorch-
ing on the surfaces
Replace
both spool
and check valve
Check valve Sliding surface with the spool Abnormal
scratches, wear or scorch-
ing on the surface
Spool and seat surfaces Contact
with the seat along the en-
tire circumference
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