Sinoboom AB14EJ - Page 75

HYDRAULIC SYSTEM
GTZZ14EJ&16EJ Maintenance Manual 63
© May 2023
Table 7-2 Boom function manifold (PN.202040003489)(Continued)
No. Name
Torque
Function
22–1 Overflow valve
40–45Nm (30-33ft-lb)
Control the pressure for leveling the platform
upward
22–2 Overflow valve
40–45Nm (30-33ft-lb)
Control the pressure for leveling the platform
downward
23 Solenoid valve
27Nm (20ft-lb)
Control the speed of turntable rotating, main boom
telescoping, platform rotating, platform leveling and
steering
24 Solenoid valve
40Nm (30ft-lb) Control the direction of main boom extending
25
Damper 5Nm (3.7ft-lb)
\
Main Boom Luffing Counterbalance Valve (PN.202040003055)
Fig 2 Main boom luffing counterbalance valve (PN.202040003055)
Table 7-3 Main boom luffing counterbalance valve (PN.202040003055)
No. Name
Torque
Function
1
Counterbalance
valve
34–41Nm (25–30ft-lb) Keep the load balanced
2 Solenoid valve
25.8–28.5Nm (19–21ft-lb) Control the speed of main boom lifting/lowering
1 2、3
4
4