5 - 23
GROUP 12 EPPR VALVE
1. COMPOSITION OF EPPR VALVE
EPPR(Electro Proportional Pressure Reducing) valve consists of electro magnet and spool valve
installed at main hydraulic pump.
ELECTRO MAGNET VALVE
Receive electric current from CPU controller and move the spool proportionally according to the
specific amount of electric current value.
SPOOL VALVE
Is the two way direction control valve for pilot pressure to reduce hydraulic pump flow.
When the electro magnet valve is activated, pilot pressure enters into flow regulator of hydraulic pump.
So, pump flow decreases to prevent engine stall.
PRESSURE AND ELECTRIC CURRENT VALUE FOR EACH MODE
1)
2)
3)
ƕ
Manually operated condition when prolix switch is selected emergency position.
Mode
Pressure
kg/cm
2
psi
Electric current(mA)
Engine rpm
H
S
L
F
ƕ
0
Ź
3
6
Ź
3
18
Ź
3
19
Ź
3
16
Ź
3
0
Ź
40
87
Ź
40
261
Ź
40
275
Ź
40
228
Ź
40
160
Ź
30
260
Ź
30
430
Ź
30
440
Ź
30
410
Ź
30
2450
Ź
50
2250
Ź
50
2250
Ź
50
1750
Ź
50
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Summary of Contents for R 160 LC-3
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Page 182: ...4 44 No of pin Receptacle connector Female Plug connector Male 24 12 24 1 13 S815 024000...
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Page 416: ...8 103 Remove lock nut 21 and then boot 26 15...
Page 427: ...8 114 Install cover 3 to hub 1 and tighten bolts 14 Torque 5 5 12 5kgf m 40 90lbf ft 7 14 15 3...
Page 456: ...8 143 1 STRUCTURE GROUP 11 WORKEQUIPMENT SECTION A SECTION B SECTION C C B B A A C...