3-3
All oil returned from each actuator returns to the hydraulic tank through the main control valve.
The bypass check valves are provided in the return circuit.
The setting pressure of bypass check valves are 1.5 kgf/cm
2
(21 psi) and 3.0 kgf/cm
2
(43 psi). Usually, oil
returns to the hydraulic tank from the left side of control valve through oil cooler.
When oil temperature is low, viscosity becomes higher and flow resistance increases when passing
through the oil cooler. When the oil pressure exceeds 3.0 kgf/cm
2
(43 psi), the oil returns directly to the
hydraulic tank, resulting in the oil temperature being raised quickly at an appropriate level.
When the oil cooler is clogged, the oil returns directly to the hydraulic tank through bypass check valve (1).
The full-flow filter and bypass relief valve are provided in the hydraulic tank.
The oil returned from right and left side of control valve is combined and filtered by the full-flow filter. A
bypass relief valve is provided in the full-flow filter.
When the filter element is clogged, the bypass relief valve opens at 1.5 kgf/cm
2
(21 psi) differential
pressure.
2. RETURN CIRCUIT
Main control valve
Actuators
Full flow filter
Check valve(1)
3.0kgf/cm
Check valve(2)
1.5kgf/cm
2
Bypass relief valve
1.5kgf/cm
Oil cooler
2
2
21073CI01
Bypass relief valve
1.5 kgf/cm
2
Содержание HX130 LCR
Страница 11: ...1 1 SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10 ...
Страница 174: ...4 5 MEMORANDUM HYUNDAI HEAVY INDUSTRIES CO LTD CONSTRUCTION EQUIPMENT DIV ...
Страница 218: ...4 49 4 49 No of pin Receptacle connector female Plug connector male 14 1 7 6 14 MG610406 KET SDL CONNECTOR 13 ...
Страница 517: ...8 89 Insert O rings to the relief valve 30 and reassemble them to rear cover 20 This completes assembly 17 32038SM42 ...
Страница 536: ...8 108 125LCR8TM30 Turn casing 1 upside down and remove oil seal 3 using jig 29 ...
Страница 545: ...8 117 125LCR8TM61 After assembling spring 44 in order clamp plug 41 Tightening torque 5 5 0 5 kgf m 39 8 3 6 lbf ft 31 ...
Страница 566: ...8 138 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10 ...
Страница 577: ...8 149 14 15 3 Install cover 3 to body 1 and tighten bolts 14 Torque 10 12 5 kgf m 72 3 90 4 lbf ft 7 21078DA10 ...
Страница 609: ...8 181 1 STRUCTURE GROUP 11 WORK EQUIPMENT SECTION C SECTION B SECTION A 130ZF8DA44 SECTION A SECTION B SECTION C ...