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Commercial Snowblower
6
OPERATING INSTRUCTIONS
1. HYDRAULIC DRIVE: All snowblower hydraulic blocks are set at the factory for a
2800 - 3000 psi system. Refer to the section on the hydraulic control block if your
system does not fall into this range.
2. ALL: Depth of the cut can be partially controlled by tilting the snowblower forward or
backward.
3. PTO DRIVE: Adjust the top link of the tractor hitch so the snowblower is just slightly
tilted back when resting on the ground. CAUTION: Excessive backward tilt may
cause the “U” joints to flutter resulting in PTO shear bolt failure.
4. PTO DRIVE: The inside holes on the hitch are spaced to fit a category 2 quick hitch
using the pins supplied. The hitch will also fit category 2 three point arms or
category 3 if you add bushings.
5. PTO DRIVE: Adjust the lower link sway chains or blocks on the tractor to restrict
movement of the blower when operating.
6. ALL: All snowblowers have a hydraulic control spout and spout deflector. Refer to
the hydraulic control block section. The pressure to the chute control is regulated by
the two modulating elements (#14a and #14b). Each controls the hydraulic pressure
in one direction. They are set at the factory to about
2 ½ turns. If the pressure is too low, the chute won’t turn. If the pressure is too high
you could damage the teeth on the spout control ring. To adjust the pressure, you
loosen the lock nut on the modulating valve and back off the adjusting screw till the
screw turns freely by hand. Turn the screw in till you feel it making contact and turn
in 2 ½ turns. Start with this setting to do any fine adjustment if necessary. Pressure
should not go over 1000 psi.
The deflector cylinder pressure is regulated by modulating element (#14a). It is set
at the factory to about 2 turns. If pressure is too low it will not operate. Excess heat
will be generated if it is set too high. Adjust if necessary as per previous paragraph.
Operating pressure should be about 700 psi.
7. ALL: Run the snowblower at low rpm to check operation before blowing snow.
8. PTO DRIVE: The blower has two shear bolts to protect the tractor and blower in
case a large object enters the blower. PTO shear bolt – two 5/16” x 1” (grade 8);
auger shear bolt – 5/16” x 1 ¼” (grade 5). Shear bolts should be fastened with a lock
nut or two jam nuts. These bolts must be tight to prevent wear of the bolts and bolt
holes.
9. PTO DRIVE: Never run PTO at over 600 rpm.