Group 1 Pump Device; Structure; Hydraulic Circuit - Hyundai Robex 235LCR-9A Service Manual

GROUP 1 PUMP DEVICE

1. STRUCTURE

The pump device consists of main pump, regulator and gear pump.
Qmin adjusting screw
Front pump
a6
a1
B1

Hydraulic circuit

SECTION 2 STRUCTURE AND FUNCTION
Qmax adjusting screw
Pi1
Dr
a4
Regulator
Pi1
a4
Dr
B1
A1 A2
a1 a6 a7
Valve block
A
Psv
a4
a7
a2
B3
Psv
Pi2
Qmin adjusting screw
Regulator
Pi2
Psv
a2
Rear pump
Port
A1,2 Delivery port
B1
Suction port
Dr
Drain port
Pi1,i2 Pilot port
Psv
Servo assist port
a1,2,4
Gauge port
a6, 7 Gauge port
a3
a3
Gauge port
A3
Gear pump delivery port
B3
Gear pump suction port
2-1
A3
B3
B3
a1 a6
A1
a3
VIEW A
Gear pump
Port name Port size
SAE6000psi 1"
SAE2500psi 2 1/2"
PF 3/4 - 20
PF 1/4 - 15
PF 1/4 - 15
PF 1/4 - 15
PF 3/8-17
PF 1/4-14
PF 1/2 - 19
PF 3/4 - 20.5
a7
a2
A2
21092MP01