TM 5-3805-263-14&P-3
TESTING AND ADJUSTING
SCHEMATIC OF STEERING CIRCUIT
1.
Steering wheel
7.
Plug
12.
Right steering cylinder.
2.
Crossover relief valve
8.
Shims
13.
Oil return line to tank.
3.
Crossover relief valve
9.
Shims
14.
Shims.
4.
Plug
10.
Oil supply line from
15.
Steering pressure
5.
Oil return line to tank
pump
reducing valve.
6.
Steering metering pump
11. Left steering cylinder
16. Plug.
Remove the steering metering pump (6) and inspect
PRESSURE CHANGE TO VALVE BY REMOVAL OR
it for worn or damaged parts and correct assembly.
ADDITION OF ONE SHIM
Remove the dual crossover relief valves and test
3G7448
APPROXIMATE
VALVE
THICKNESS
CHANGE
them on the hydraulic bench.
2
PART NO
in.
mm
psi
kg/cm
The opening pressure for the 9J630 relief valve is
1700 25 psi (119.5 1.8 kg/cm2), with an oil flow of 2
5J4857
.010
0.254
170
1.8
.25 U.S. gpm (8 1 litre/min).
The opening pressure for the 3G8436 Relief Valve is
Steering Metering Pump
2200 25 psi (154.7 1.8 kg/cm2) at 2 .25 gpm (8 1
litre/min).
If the pressure in the previous tests was less than
The opening pressure for the 3G7448 Relief Valve is
2
1825 25 psi (128.3 + 1.8 kg/cm ), the problem can be
2372 29 psi (166.8 2.0 kg/cm2) at 5 0.3 gpm (19
in the steering metering pump or the setting of the dual
1 litre/min).
crossover relief valve can be too low. In either case the
unit must be removed from the machine to be checked.
3-30
