Front Pto Control - Belarus 1822.3 Operator's Manual

The system is powered from the tractor on-board electrical circuit through the fuse
block 4. The FDA drive control system gets powered after the engine has been started.
The switch 2 has three positions:
- "FDA automatic control" (upper fixed position);
- "FDA engaged positively" (lower fixed position);
- "FDA off" (middle fixed position).
In position of the switch 2 "FDA off" the FDA drive clutch is connected with drain
and FDA drive is off.
In position of the switch 2 "FDA automatic control" the FDA drive is automatically
engaged as the tractor moves forward by the sensor 6, sending enabling signal, depend-
ing on the rear wheel skidding. Herewith, oil flow is supplied under pressure to the FDA
drive engaging clutch. The FDA drive is disabled automatically when the front wheels are
turned to the angle of more than 25° to any direction from the straight line position. As the
tractor reverses and the FDA is controlled automatically, the FDA drive always disen-
gages.
When the switch 2 is set into position "FDA engaged positively" the FDA drive is
forcedly engaged at forward motion as well as at reverse irrespective of the front wheel
turning angle and skidding.
ATTENTION: PRESSING THE INTERCONNECTED BRAKE PEDALS ENGAGES
THE FDA DRIVE IRRESPECTIVE OF THE SWITCH 2 POSITION!
ATTENTION: DRIVING ON ROADS WITH HARD SURFACE THE FDA SHALL BE
DISENGAGED TO AVOID INCREASED WEAR OF FRONT TYRES AND PARTS OF THE
DRIVE!
ATTENTION: IT IS FORBIDDEN TO ENGAGE THE FDA POSITIVELY WHEN
TRACTOR SPEED EXCEEDS 13 KM/H!

3.12.3 Front PTO control

The FPTO is mounted on "BELARUS - 2022.3/2022 .3" tractor against order.
Elements of the electrical part of FPTO control are introduced in subsection 2.14
"Control panel for rear axle DL, FDA and FPTO drives. Rear power takeoff control."
An electric circuit diagram of the FPTO control system is introduced in figure 3.12.3.
Elements of the hydraulic part of FPTO control are introduced in subsection 3.7 "Front power
takeoff shaft".
1 – FPTO switch; 2 – two-position FPTO switch; 3 – FPTO "on" annunciator; 4 – relay; 5 – diode; 6 – electro-
magnet of FPTO valve group; 7 – junction block.
Figure 3.12.3 – Electric circuit diagram of the FPTO control system
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