Rear Pto Control Distributor - Belarus 3522.5 Operator's Manual

3.11.5 Rear PTO Control Distributor

The rear PTO control distributor is intended for rear PTO engagement and disen-
gagement. The distributor consist of casing 1 (figure 3.11.6), in which are situated the
spring loaded valve core 2, electrodriven proportional valve 3 and pressure sensor 4.
By pressing the button of rear PTO engagement in cabin on CECS face plate elec-
tric signal is given to proportional valve 3 which moves its core. Meanwile power fluid
comes under pressure to the end face of valve core 2 which, compressing spring, moves
upwards. The liquid comes under pressure in channel "PTO" and further in PTO friction
clutch, channel "Brake" is connected with drain. At pressure increase above 0,8 MPa is
activated pressure sensor 4 and on CECS face plate flashes indication light of rear PTO
engaged condition.
By pressing the button of rear PTO disengagement happens deenergization of pro-
portional valve 3 and moving of its core, therefore power fluid comes under pressure
through channel "P" and through aperture "Brake" in distributor casing comes in PTO
brakes booster. When this happens spring returns valve core 2 in starting position and
channel "PTO" connects with drain. PTO brake is engaged and PTO friction is disengaged.
ВОМ joins, and PTO friction clutch is switched off. The indication lamp of rear PTO en-
gagement on CECS face plate goes out.
brake
drain
1 – casing; 2 – valve core; 3 –proportional valve; 4 – pressure sensor.
Figure 3.11.6 – Rear PTO control distributor
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PTO
147
3522.5-0000010 РЭ