TM 5-3825-226-24
STEERING CONTROL VALVE
1. Plug for relief valve pressure tap. 2. Steering
control valve.
1. Remove plug (1) from steering control valve (2) and
install the hose for the pressure gauge. Connect the
other end of the hose to the 0 to 4000 psi gauge
(from the 5P5224 Pressure Gauge Kit).
2. Start the engine and turn the machine against the
stop.
3. With the engine at high idle, keep the steering wheel
in the turned position. Watch the pressure gauge.
4. The indication on the gauge is the pressure of the oil
that opens the relief valve for the steering circuit.
The correct pressure setting of the relief valve is
2000 ± 25 psi (140.6 ± 1.8 kg/cm2) (13 790 ± 172
kPa).
STEERING CONTROL VALVE
2. Steering control valve. 3. Plug.
5. If it is necessary to change the relief valve setting,
remove plug (3) from the steering control valve.
Add shims (4) for an increase in the pressure
setting, and remove the shims for a pressure
decrease.
PRESSURE CHANGE FOR ONE SHIM
Part No.
Thickness
Change In Pressure
3H2549
.010 in. (0.25 mm)
40 psi (2.8 kg/cm2)
(276 kPa)
STEERING CONTROL VALVE
3. Plug. 4. Pressure relief shims.
Check of Valve Spool Center Position
The valve spool is kept in the NEUTRAL position by
springs (3) and (4). The spool must be in its center
position when the springs move the spool to NEUTRAL.
To check the center position of the spool:
1. Install two 600 psi gauges to check the pressure at
valves (1) and (2).
STEERING LINES (TOP OF GOOSENECK)
1. Bleed valve for right turn circuit. 2. Bleed valve
for left turn circuit;
2-112
