2122.6-0000010 OM
154
6. Safety clutch as shown in figure 4.9.2 shall be installed only from the side of PRS
of the coupled implement drive, another mounting method does not provide timely protec-
tion of the tractor PTO from the excess of maximum permissible torque. After lengthy non-
productive time, check technical condition of the implement safety clutch.
Figure 4.9.2 – Safety clutch mounting diagram
7. Mounting of the cardan shaft with a guard housing together with PTO shaft and
PRS protective devices, with retaining chains both from the side of the PTO shaft and of
the PRS, as shown in figure 4.9.3, provides cardan joint safety.
Figure 4.9.3 – Safety cardan shaft mounting diagram
8. When the cardan shaft is used for the first time, it is necessary to check the car-
dan shaft length, and to adjust it to the operating conditions with tractors “BELARUS-
2122.6” if needed. For more detailed instructions on cardan shafts - see the technical
documentation enclosed. Contact the cardan shaft manufacturer when needed.
9. The length of the cardan shaft maximally driven apart (which is permitted for op-
eration) shall be of such type when one part of the cardan shaft enters the other for not
less than L
2
=150 mm. If the value is below L
2
=150 mm (figure 4.9.4, view
А
) the cardan
shaft shall not be operated. Sufficiency of overlapping L
2
can be checked by rotating or lift-
ing the coupled implement.
Figure 4.9.4
– Choice of the cardan shaft length
10. With the tractor and the coupled implement in a straight-line position, when the
cardan shaft is pushed in fully, it is required to check if there is sufficient clearance L
1
(fig-
ure 4.9.4, view B) between the tube butt and the universal joint yoke butt. The minimum
permissible clearance L
1
shall make at least 50 mm.
11. After cardan shaft coupling, bring all protective devices into a proper condition,
including fixing of the guard shaft housing with the chains to prevent rotation, as shown in
figure 4.9.3.
PRS
Safety clutch
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