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When the push rod (9) is stroked, the spool (3) moves downwards.
Then port P is connected with port (1) and the oil supplied from the pilot pump flows through port
(1) to generate the pressure.
When the pressure at port (1) increases to the value corresponding to the spring force set by tilt-
ing the handle, the hydraulic pressure force balances with the spring force. If the pressure at port
(1) increases higher than the set pressure, port P is disconnected from port (1) and port T is con-
nected with port (1). If it decreases lower than the set pressure, port P is connected with port (1)
and port T is disconnected from port 1.
In this manner the secondary pressure is kept at the constant value.
Besides, in some type, when the handle is tilted more than a certain angle, the upper end of the
spool contacts with the inside bottom of the push rod and the output pressure is left to be con-
nected with port P.
Case where handle is tilted
9
3
P
T
Port 1
Port 3
(2)
300L2RL04
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 ...