Determination Of Pto Shaft And Cardan Shaft Applicability; Peculiarities Of Pto Shaft And Cardan Shaft Applicability - Belarus 1523.5 Operator's Manual

1523.5-0000010 OM

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 limitation 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 el-
ements. Clutches with a destructible element are used as unlikely overload control device.
ATTENTION: IT IS NOT RECOMMENDED TO USE CARDAN SHAFTS WITH SAFETY
CLUTCHES WITH A DESTRUCTIBLE ELEMENT FOR IMPLEMENTS COUPLING WITH
TRACTORS "BELARUS-1523.5"!
In some implements freewheeling clutches are used. Freewheeling clutches (sprag clutch-
es) are automatically locked if the rotating direction is straight, and are unlocked if the ro-
tating direction is opposite. Freewheeling clutches provide operation of the implements
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 NECESSITY OF
SAFETY CLUTCH USE, CLUTCH DESIGN PECULIARITIES AND CONSEQUENSES OF
THE IMPLEMENTS USE WITHOUT THE SAFETY CLUTCH!
While choosing (purchasing) and operating the cardan shaft, it is required to follow the in-
structions of the implement and cardan shaft manufacturer first of all. It is recommended 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 OUT-
COME! 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 SER-
VICES (ADJUSTMENT, GREASING AND ETC.), MOUNTING AND DISMOUNTING OF
THE CARDAN SHAFT SHALL BE CARRIED 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!
ATTENTION: TRACTOR MANUFACTURER SHALL NOT BE RESPONSIBLE FOR THE
COUPLED IMPLEMENTS CARDAN SHAFTS FAILURES. CARDAN SHAFTS SPECIFI-
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