LOAD SENSING PROPORTIONING VALVE FUNCTION TEST <Vehicles without ABS>

1.Connect pressure gauges to the input and output ports of the load sensing proportioning valve. sure gauge. 2.Air bleeding (Refer to ). 3.Disconnect the spring at the support side.

4.Place the spring so that it is in parallel with the load sensing proportioning valve, and then pull in the direction indicated by arrow A so that its length H shown in the figure (the length between its ends) is as noted below. note At this time the lever is pressed all the way to the load sensing proportioning valve side. 5.Check at this time whether or not the output fluid’s pressure, relative to the load sensing proportioning valve’s input fluid pressure, is within the standard value. Standard value: Items Spring length H mm Input fluid pressure MPa Output fluid pressure MPa Short wheelbase 133*1 9.8 4.9 - 5.9 149*2 9.8 7.5 - 8.5 16.7 9.0 - 11.0 Long wheelbase 133*1 9.8 5.9 - 6.9 149*2 9.8 9.3 - 10.3 16.7 11.4 - 13.4 note *1 and *2 indicate the applicable lengths for unladen and laden vehicles respectively. 6.After making the check, install the spring. Disconnect the pressure gauges from the load sensing proportioning valve and bleed air.