JLG G12-55A Service Manual - Manual (Page 123)

8-7 G10-55A, G12-55A
Hydraulic System
a. Pressure Specifications
Before S/N 0160037877
G10-55A - Before S/N 0160031864
G12-55A - Before S/N 0160030644 G10-55A - S/N 0160031864 & After
G12-55A - S/N 0160030644 & After
Hydraulic Circuit Test Port Function Used to
Test
Adjustment
Location
Pressure Range
Main P1 (A) Bottom Tilt Down 1
3600-3650 psi
(248-252 Bar)
Pilot JS1 (B) No Function 2
500-550 psi
(34-38 Bar)
Standby P1 (A) No Function 3
750-775 psi
(52-53 Bar)
Service Brake
Supply
BV1 (C)
Bottom Steering,
Any Mode
4
1000-1100 psi
(69-76 Bar)
Steering GLS (D)
Bottom Steering,
Any Mode
5
2400-2500 psi
(165-172 Bar)
Lift LS2 (E) Bottom Lift Down 6
3500-3525 psi
(241-243 Bar)
Boom Retract LS2 (E)
Bottom Boom
Retract
7
3050-3075 psi
(210-212 Bar)
MY1141
2
3
1
4
A
B C D
E
HYDRAULIC
MANIFOLD
MY1301
5 6 7
MAIN CONTROL VALVE
MY1831
2
3
1
4
A
B C D
E
HYDRAULIC
MANIFOLD