HYDRAULIC UNITS
HYDRAULIC PUMP
IV-32TB53FR
Parts Judgment Criteria
Treatment
•A clearance S of 0.05 mm or more
between the piston and the cylinder
block
• Occurrence of scratches, scoring,
abnormal wear, etc. on sliding parts
Piston and cylinder
block assembly
Slack of the piston
shoe
Shaft and oil seal
installation part
Valve plate
•A slack S of 0.2 mm or more for the
piston shoe
•A wear amount of 0.025 mm at the
installation part of shaft and oil seal
• No abnormal scratches (0.02 mm or
more), wear, or sticking for the slid-
ing surfaces
• Exchange
• Exchange.
• Exchange
• Exchange
•
Correct by lapping
or exchange.
• No abnormal wear or harmful
scratches of the sliding surfaces
• At the time of reassembly after dis-
assembly
• No abnormal scratches, wear, or
flaking of the tooth surfaces
• No abnormal scratches, wear, or
flaking of the rolling surfaces
• Exchange
• Exchange
• Exchange
•
Exchange the shaft
and the assembly.
Bushing
Seals and O-rings
Drive gear and
driven gear
Ball bearings and
needle bearings
OIL SEAL MOUNT
STANDARD DIMENSION
INSPECTION AND ADJUSTMENT
Checking the Parts
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