HYDRAULIC UNITS
SWIVEL JOINT
IV-154TB53FR
INSPECTION AND ADJUSTMENT
Inspection Procedure and Treatment
Inspection Interval Place Inspected Inspection Procedure Treatment
2,000 hrs. Seals which prevent ex-
ternal leakage of hy-
draulic oil
Check if oil is leaking out Replace the O-rings if there
is leakage
4,000 hrs.
Disassemble and check
whether there is leak-
age or not
All seal parts
Check for abnormal wear,
scratches, corrosion, etc., due
to seizing, biting of foreign mat-
ter, etc.
Replace all seal parts
Treat in accordance with the
use limit
Treat in accordance with the
use limit. However, replace
the seal kit
Check for abnormal wear,
scratches, corrosion, etc., due
to seizing, biting of foreign mat-
ter, etc.
All sliding parts
All partsWhen disassembling
due to breakdown
Checking the Parts
Hub, Shaft
Parts Judgment Standard Treatment
Seal parts and sliding
parts
• Parts which wear away due to wearing of surfaces
which have undergone ultrasonic tempering, and
parts which come off due to seizing, biting in of
foreign matter, etc.
Replace with new parts
• Parts with abnormal wear or with scratches 0.1 mm
deep or deeper due to seizing or biting in of foreign
matter, etc.
• Parts with scratches less than 0.1 mm deep
• Parts which are worn 0.5 mm or more, or abnormally
worn parts
• Parts with less than 0.5 mm of wear
• Parts with scratches due to seizing, biting in or
foreign matter, etc., which are within the wear limit
of 0.5 mm and which can be repaired
Hub and shaft sliding
parts other than seals
Portions which slide
against the thrust ring
Replace with new parts
Repair with an oil stone
Replace with new parts
Repair so that it is smooth
Repair so that it is smooth
Flange
Parts Judgment Standard Treatment
Portions which slide
against the shaft end
• Parts which are worn 0.5 mm or more, or abnormally
worn parts
Replace with new parts
• Parts with less than 0.5 mm of wear
• Parts with scratches due to seizing, biting in or
foreign matter, etc., which are within the wear limit
of 0.5 mm and which can be repaired
Repair so that it is smooth
Repair so that it is smooth
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