Commercial Snowblower
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.
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