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7-25
5. RCV LEVER
Maintenance
check item
Criteria
Remark
Leakage
The valve is to be replaced when the leakage becomes
more than 1000 cc/m at neutral handle position, or more
than 2000 cc/m during operation.
Conditions :
Primary pressure : 40 kgf/cm
2
Oil viscosity : 23 cSt
Spool
This is to be replaced when the sliding surface has worn
more than 10
μ
m,
compared with the non-sliding
surface.
The leakage at the left condition is
estimated to be nearly equal to the
above leakage.
Push rod
This is to be replaced when the top end has worn more
than 1 mm.
Play at operating
section
The pin, shaft, and joint of the operating section are to
be replaced when their plays become more than 2 mm
due to wears or so on.
When a play is due to looseness of a
tightened section, adjust it.
Operation stability
When abnormal noises, hunting, primary pressure drop,
etc. are generated during operation, and these cannot
be remedied, referring to section 6 troubleshooting,
replace the related parts.
Notes 1. It is desirable to replace seal materials, such as O-rings, every disassembling. However,
they may be reused, after being confirmed to be free of damage.
Ø
7
1 mm
Summary of Contents for HX130 LCR
Page 11: ...1 1 SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10 ...
Page 174: ...4 5 MEMORANDUM HYUNDAI HEAVY INDUSTRIES CO LTD CONSTRUCTION EQUIPMENT DIV ...
Page 536: ...8 108 125LCR8TM30 Turn casing 1 upside down and remove oil seal 3 using jig 29 ...
Page 566: ...8 138 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10 ...