INSTALLATION (CONT.)
Previous examples clearly demonstrate that universal joint angle is directly related with life of PTO in order to
reduce angle, it is necessary to increase the distance between snowblower and tractor.
It is impossible to increase the distance between snowblower and tractor, in order to maintain a reasonable
angle at PTO, it is recommended to use a large size of PTO, That is a greater capacity PTO, (please refer to
your dealer for more details).
For snowblowers of 100 HP an additional gearbox is also available that can be mounted on existing snowblower
gear box, which increased the input shaft height, reducing angle at PTO joints. This gear box also has a an
input speed of 1000 RPM, which greatly increases PTO capacity.
ANGLES AT EACH END OF PTO
A popular habit is to change snowblower angle in order to obtain a better scraping effect. This practice can
become harmful to the PTO, angle at each end being unequal. There will be a fan speed variation as well as a
drastic increase of load on cross and bearings. To avoid, it is recommended to keep tractor PTO Shaft and
snowblower input shaft always parallel.
SHEAR BOLTS
Shear bolts are built to break under shocks on the fan or on the auger. However, under certain circumstances,
this security is not adequate. Example: a sudden high impact shock on the fan may, in some cases, break the fan
shaft without breaking the shear bolt.
If the shear bolt breaks, make sure to always replace it with a same category bolt (grade 8.8). It is necessary to
always maintain this bolt very tight, in order to keep the efficiency of the shearing mechanism.
WARNING:
The gear box fan shafts are made with special allow steel. Moreover, they are case hardened
to increase capacity to shock load. These shafts cannot be broken under normal snow loads.
However, undesirable objects may enter the fan and either bend or break gear box shaft. It is understood that
gear box cannot be built to resist every possible overloads and consequently, gear box fan shafts will not be
replaced under warranty. Therefore, the user of the snowblower must be very careful.
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