TM 5-3825-226-24
Lift Cylinder Up (No illustration)
Hold the control lever in the UP position and it keeps
the valve spool in UP position (C), in control valve (3).
The UP position of the valve spool opens a passage to
the tank for the oil in vent line (8) and also lets the pump
oil, in the control valve, go through line (9) to carry
check valves (4). With vent line (8) open to the tank,
the pump oil in line (9) goes through carry check valves
(4) into the rod ends of lift cylinders (2). The pump oil
moves the pistons and rods up, raising the water
distributor. The pistons push the oil out of the head
ends of the cylinders. through line (5) to control valve
(3). The oil goes through the control valve and through
return oil line (13) into the filter and tank (19).
Release the control lever and the spring on the valve
spool moves it to HOLD position (B). The
HOLD position of the valve spool closes the passage to
the tank for the oil in vent line (8), and carry check
valves (4) close. The movement of the water distributor
stops when the check valves close.
WATER PUMP CIRCUIT
The water pump control lever is held in FORWARD
position by the detent balls, in water pump control valve
(12), that keep the water pump valve spool in
FORWARD position (C). With the speed control lever in
HI position, the valve spool in water pump speed valve
(6) is in HIGH SPEED position (H).
SCHEMATIC OF HYDRAULIC SYSTEM FOR WATER PUMP ON
1. Water pump hydrau-
6.
Water pump speed
12. Water pump control
18. Pump (cylinders and
lic motor.
valve.
valve.
steering).
2. Lift cylinders.
7,8. Oil lines (for
13. Return oil line.
19. Pump (water pump).
hydraulic motor).
14. Relief valve (water
A.
REVERSE position.
3. Cylinders control
9.
Relief valve (lift
pump).
B.
HOLD position.
valve.
cylinder circuit).
15. Oil line (lift cylinder
C.
FORWARD position.
4. Water pump valve
10. Oil line to water
circuit).
H.
HIGH SPEED posi-
spool
pump, control
16. Oil line (for
tion.
5. Lift cylinders valve
valve).
steering).
L.
LOW SPEED posi-
spool.
11. Oil drain line.
17. Filter and tank.
tion.
5-5
