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9.4 PTO SHAFT
TYPE OF PTO SHAFT
The universal drive shaft should have the capacity of trans-mitting power at a rate of 67 kW at a
nominal speed of 540 rpm and to sustain a torque of 1300Nm. The shaft should be fitted with
overload and ratchet clutches. A suitable drive shaft is, for example, EG T60 0610 CE 112 RF42
NR overrunning, or Walterscheid 2400 SD25-610- FK96.
PTO SHAFT LENGTH
The drive shaft must be of correct length for the application for the sake of operator safety, the
mechanical durability of the shaft itself and its operational characteristics. The splines of the
sliding tubes must overlap at least by 100 mm (4"). Too long a shaft will bottom causing the shaft
to get damaged. With too short a shaft the two halves may get separated from each other when
lifting the implement on the tractor hitch. This could lead even to grave consequences.
Too small an overlap also reduces the shaft's capacity to transmit the required power and thus
may lead to mechanical damage to the shaft itself.
SHORTENING A PTO SHAFT
1.
The shortest operational length of the shaft is determined by lifting the machine on the
tractor hitch (see Fig.1).
2.
A 25 mm (1") free play should be left on the shaft and marked on the shaft circumference
(see
Fig.2).
3.
Using a hacksaw, saw off equal lengths from inner and outer tubes and shields of both
kuva 3
kuva 1
kuva 2
