Agricultural PTO drive shaft
HZPT GROUP supply a very large range of spare parts, needed by the end user for the routine maintenance of the PTO shafts, that must be performed at least once a week.
The parts of the PTO shafts that are most subject to wear are:
the telescopic tubes
the safety guards
the cross joints
the torque limiters.
HZPT GROUP recommends annual maintenance, just before the beginning of the new agricultural season, to check that the above-mentioned components are working correctly.
HZPT GROUP has a large inventory of any spare parts for the PTO shafts, such as:
yokes for outer tube
yokes for inner tube
joints for outer tube
joints for inner tube
simple joints and double joints
constant velocity joints
free wheels (RA)
shear bolt torque limiters (SB)
pawl torque limiters (SW)
overrunning friction torque limiters.
Note: Broken, damaged or badly fitting guards
can be just as dangerous as no guard at all.
This leaflet is aimed at all users of PTO-driven
A 26-year-old stockman was adapting the pump
unit of a slurry tanker to provide vacuum drive
to a milking unit. On stepping over the partially
unguarded PTO shaft his left trouser leg became
entangled in the revolving PTO, resulting in his leg
■ Protect the tractor PTO with a shield covering the
top and both sides of the PTO so that it stops
anyone making contact with it, either with parts of
their body or their clothes. Make sure this shield
is well constructed and capable of supporting a
downward load of at least 120 kg. When the PTO
is not in use, it may be covered by a fixed cap.
■ Guard PTO drive shafts by enclosing them along
their full length, from the tractor to the first bearing
on the machine.
■ Advice on guard dimensions and design
specifications for agricultural PTO drive shaft
guards is given in:
– BS EN 12965:2003+A2:2009 Tractors and
machinery for agriculture and forestry. Power
take-off (PTO) drive shafts and their guards.