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The lifetime of the driving shaft and its components such as forks, seals and tubes depends on several factors that cannot be
controlled by Normand Company.
The following issues directly affect the lifetime of the drive shaft:
Excessive P.T.O. angle (Recommended 15° and less)
The shear bolts (use only the original bolts)
The frequency of lubrication and the type of grease used (good quality grease, industrial-type)
Length of the P.T.O. (if too short, if too long)
In the event that one or more of the above mentioned situations applies, we suggest you as an option the following solutions.
To increase the distance from the tractor to the snowblower would reduce the angle at the joints.
The installation of a raiser and reducer gearbox 1000 rpm to 540 rpm on the snowblower would reduce the angle and
mechanical stress of the P.T.O. on the tractor
A bigger driving shaft (for an intensive use when the tractor is at the top of the recommended power would extend the
lifetime of the shaft when the operating angle is moderate.
A driving shaft with multi lobe tubes (would facilitate the sliding of the tubes)
To avoid
Too big angle at the P.T.O. joints
To avoid
Unequal angles at the P.T.O. joints
Proper working angles are crucial for the life of the PTO components.
Always try to keep both angles equal. Vibrations and speed variations on either end will balance and cancel
each other out.
When the angles are large the cross bearing are under larger loads and their life is reduced.
When both angles are not equal, vibrations increase and life of components is reduced.
IMPORTANT NOTICE
Reasonable angle at the P.T.O. joints
Equal angles at the P.T.O. joints
7
Acceptable
Recommended
Adequate
Equal angles
To avoid
Unequal angles
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