SUB-SECTION 4D
CONTROL VALVES
Figure 4D-13. Control Valve (36Z840)
RELIEF VALVE ADJUSTMENT
The following adjustment procedures are intended to be
performed by qualified service personnel who posses a
GENERAL. Each inlet section of this valve contains its
thorough working knowledge of the hydraulic system.
awn relief valve to limit maximum circuit pressure. Refer to
the pressure deal mounted on the control valve access door
CAUTION
behind the operators cab for the exact relief valve settings.
The pressure settings listed on the pressure decal must
The relief valves have been adjusted at the factory end
be strictly adhered to. Any attempt to change the
should retain their setting over extended periods of time
settings without specific written approval of the
under normal conditions. The valve springs will eventually
Regional Service Manager will void any and all war-
weaken with machine use, however, so periodic checking of
ranties, expressed or implied.
the valve settings is recommended.
ADJUSTMENT. Adjust each relief valve as follows:
If a relief valve is removed for cleaning, inspection, of other
reason, readjustment will be required following installation.
1. Before adjusting the relief valve settings, it is recom-
4D-18