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D877 MGB Rev01 HE250.docx
2.2
Hydraulic diagram
LEGEND
1 Gauge
2 Gauge cut-out cock
5 Maximum pressure valve adjusting screw
- clockwise increase (+) - anticlockwise decrease (-)
12 VSC valve zero contact
16 ENR solenoid valve (unblock VNR valve)
17 Emergency manual lowering (clockwise rotation)
18 Filter
19 Ball valve
20 ERS solenoid valve (unblock VSR valve)
23 VSC valve block control throttle
25 Emergency manual lowering minimum pressure
- clockwise increase (+) - anticlockwise decrease (-)
26 Hand pump
27 Hand pump maximum pressure valve
- clockwise increase (+) - anticlockwise decrease (-)
28 Hand pump non-return valve
29 Hand pump air-release screw
97 VNR valve block control throttle
TF
Flow meter
TP1
Pressure meter
TT
Temperature meter
ENR
VNR valve unblock solenoid valve
ERS
VSC valve unblock solenoid valve
MPP
VSC valve command Stepper motor
VNP
Pump no return valve
VNR
No return and downstroke safety valve
VPM
Pump maximum pressure valve
VSC
Flow control valve
P1
Auxiliary microrelevelling port
OTHER PUMP UNIT COMPONENTS
M Pump motor
P Pump
S Pump silencer
T Flexible pump connection pipe
