Section 4 • Repair Procedures
REV A
Part No. 116478
AL8000HT Light Tower
4 - 23
September 2008
8-1
Function Manifold Components
The function manifold is located next to the hydraulic power unit inside the engine compartment.
I
ndex
Schematic
No.
Description
Item
Function
Torque
1
Solenoid valve, 3 position 4 way ...... E ........... Light bar up/down ........................................ 25 ft-lbs / 34 Nm
2
Solenoid valve, 3 position 4 way ...... C ........... Tower extend/retract .................................... 25 ft-lbs / 34 Nm
3
Solenoid valve, 3 position 4 way ...... B ........... Tower up/down ............................................ 25 ft-lbs / 34 Nm
4
Relief valve - Bi-directional,
1200 psi / 82.7 bar ............................ H ........... Tower rotate left/right ................................... 20 ft-lbs / 27 Nm
5
Solenoid valve, 3 position 4 way ...... G ........... Tower rotate left/right ................................... 25 ft-lbs / 34 Nm
6
Priority flow regulator valve,
0.2 gpm / 0.76 L/min .......................... D ........... Light bar up/down circuit ............................. 20 ft-lbs / 27 Nm
7
Orifice plug,
0.025 inch / 0.64 mm ......................... F ........... Tower rotate circuit
CHASSIS COMPONENTS
E
1
C
2
B
3
H
4
G
5
D
F
7
6
