4 - 1
Section E Hydraulics
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Section E
4 - 1
Issue 1
Pressure Testing
G1
G2
G3
G4
A
G
E
C
D
B
F
L
Key
A Main relief valve
B Boom raise relief valve
C Boom lower relief valve
D Bucket open relief valve
E Bucket close relief valve
F Dipper out relief valve
G Dipper in relief valve
L Hammer relief valve
Key
G1 Main Pump P1
G2 Main Pump P2
G3 Servo Pressure (JS 160)
G4 Servo Pressure (JS 130)
Pressure Measuring Points
Pressure Relief Valves
A
B