Determination Of Pto Shaft And Cardan Shaft Applicability; Peculiarities Of Pto Shaft And Cardan Shaft Applicability - Belarus 2022.6 Operator's Manual

4.8 Determination of PTO shaft and cardan shaft applicability

To avoid failures of PTO shaft and PRS in implements with active operating parts
(tilling rotary implements, combine harvester, mowers, cattle-feeders, pickup balers and
etc.) mechanical safety clutches are used.
Functional assignment of the safety clutch is automated gear deactivation or limita-
tion of the torque value transmitted from the PTO shaft to PRS under overloads caused by
large starting moment, overload (locks) of the operating parts and loads fluctuations on the
PRS drive.
ATTENTION: THE RESPONSE TIME OF THE COUPLED IMPLEMENT SAFETY
CLUTCH SHALL EXCEED THE RATED OPERATING TORQUE ACTING FOR A LONG
TIME IN THE IMPLEMENT DRIVE, BUT BE ALWAYS EQUAL TO OR LESS THAN THE
MAXIMUM PERMISSIBLE PTO SHAFT TORQUE! IF THE RESPONSE TIME OF THE
IMPLEMENT SAFETY CLUTCH EXCEEDS THE PERMISSIBLE PTO SHAFT TORQUE,
SUCH IMPLEMENT MUST NOT BE COUPLED WITH THE TRACTOR.
Safety clutches are divided into cam clutches, frictional clutches, disk clutches, and
they can be subdivided into two basic types – with destructible and indestructible operating
elements. Clutches with a destructible element are used as unlikely overload control de-
vice.
ATTENTION: IT IS NOT RECOMMENDED TO USE CARDAN SHAFTS WITH
SAFETY CLUTCHES WITH A DESTRUCTIBLE ELEMENT FOR IMPLEMENTS COU-
PLING WITH TRACTORS "BELARUS-2022.6"!
In some implements freewheeling clutches are used. Freewheeling clutches (sprag
clutches) are automatically locked if the rotating direction is straight, and are unlocked if
the rotating direction is opposite. Freewheeling clutches provide operation of the imple-
ments with the increased inertia moment of the implement rotating masses to prevent it
from the drive failure during the PTO shaft deactivation.
There are also integrated safety clutches. An integrated safety clutch is a safety
clutch which is structurally combined with a clutch of other type, for example with a free-
wheeling clutch.
ATTENTION: MANUFACTURER OF THE IMPLEMENT WITH CARDAN DRIVE
FROM THE TRACTOR PTO, SHALL INFORM YOU IN ADVANCE ABOUT THE NECES-
SITY OF SAFETY CLUTCH USE, CLUTCH DESIGN PECULIARITIES AND CONSE-
QUENSES OF THE IMPLEMENTS USE WITHOUT THE SAFETY CLUTCH!
While choosing (purchasing) and operating the cardan shaft, it is required to follow
the instructions of the implement and cardan shaft manufacturer first of all. It is recom-
mended to apply implements with active operating parts with the tractor, which have the
length of the fully displaced cardan shaft between hinge joint centers not more than 1 m.

4.9 Peculiarities of PTO shaft and cardan shaft applicability

WARNING: BE CAREFUL WHEN PTO SHAFT IS ACTIVATED AND THE CARDAN
SHAFT OF THE COUPLED IMPLEMENT IS ROTATING. IN CASE THERE ARE PEOPLE IN
THE AREA OF PTO SHAFT OPERATION, THEY OR THEIR CLOTHES CAN BE CLAMPED
BETWEEN THE IMPLEMENT ROTATING PARTS AND OTHER MOVING MACHINERY.
THAT CAN RESULT IN PERMANENT INJURY INCLUDING FATAL OUTCOME! FOR THIS
REASON BEFORE STARTING THE PTO SHAFT, MAKE SURE THERE ARE NO PEOPLE IN
THE DANGEROUS AREA BETWEEN THE TRACTOR AND THE IMPLEMENT. ALL KINDS
OF WORK CONNECTED WITH MAINTENANCE SERVICES (ADJUSTMENT, GREASING
AND ETC.), MOUNTING AND DISMOUNTING OF THE CARDAN SHAFT SHALL BE CAR-
RIED OUT WHEN THE TRACTOR PTO SHAFT AND ENGINE ARE OFF. BEFORE CARDAN
SHAFT MOUNTING, STOP THE ENGINE, GET THE IGNITION KEY OUT OF THE STARTER
AND INSTRUMENTS SWITCH, AND ENGAGE THE PARKING BRAKE!
130
2022.6-0000010 OM