JLG G12-55A Service Manual User Manual
Page 124
Hydraulic System
8-8
G10-55A, G12-55A
b. Pressure Specifications
S/N 0160037877 & After
Hydraulic Circuit
Test Port
Function Used to
Test
Adjustment
Location
Pressure Range
Main
P1 (A)
Bottom Tilt Down
1
3625-3700 psi
(250-255 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
1050-1150 psi
(72-79 Bar)
Steering
GLS (D)
Bottom Steering,
Any Mode
5
2450-2550 psi
(169-176 Bar)
Load Sense
LS2 (E)
Bottom Tilt Down
6
3350-3450 psi
(231-238 Bar)
Boom Extend
LS2 (E)
Bottom Boom
Extend
7
3300-3400 psi
(227-234 Bar)
Boom Retract
LS2 (E)
Bottom Boom
Retract
8
3300-3400 psi
(227-234 Bar)
Lift
LS2 (E)
Bottom Lift Down
9
3300-3400 psi
(227-234 Bar)
Auxiliary Hydraulic
LS2 (E)
Bottom Auxiliary
Function
No Adjustment
3175-3325 psi
(219-229 Bar)
MY1831
2
3
1
4
A
B
C
D
E
HYDRAULIC
MANIFOLD
MY4360
8
5
6
7
9
MAIN CONTROL VALVE