HYDRAULIC SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
PRESSURE REDUCING VALVE ADJUSTMENT - CONTINUED
N OT E
Always turn adjustment screw clockwise to adjust pressure. This will compensate for any internal friction
inside pressure reducing valve that would oppose setting of bias spring. For example, if adjustment screw
needs to be turned counterclockwise by 1/2 turn to decrease pressure, turn adjustment screw counterclock-
wise by one full turn. Then, turn adjustment screw clockwise by 1/2 turn.
Adjust pressure reducing valve (23).
Loosen locknut (24) and turn adjustment screw (25) clockwise to increase and counterclockwise to decrease pres-
sure setting of pressure reducing valve (23). One turn of adjustment screw will change pressure reducing valve
pressure by 100 psi (690 kPa).
While holding adjustment screw (25), tighten locknut (24) to 106 ± 18 lb-in. (12 ± 2 Nm).
Repeat Pilot Pressure to Main Control Valve Check in
this work package.
If pressure setting is not correct, repeat step 7.
Install front guard (20) on machine.
Start and run engine at low idle (TM 5-3805-291-10).
Remove work tool from jack stands and position work
tool on ground (TM 5-3805-291-10).
Stop engine (TM 5-3805-291-10).