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20 Owner Service
MAN0869 (04/13/2011)
TROUBLE SHOOTING
PROBLEM PROBLEM CAUSES SUGGESTED SOLUTION
PTO Shaft shear bolt continues
to shear
PTO shaft at too great an angle. Do not exceed a 15 degree
angle at PTO shaft.
PTO shear bolt is too soft. Use a grade 5 shear bolt. (GKN)
Use a grade 10.9 bolt. (Comer
20 series)
Use a grade 8.8 bolt. (Comer
40 series)
Tilt on the snowblower is too
great causing an excessive
knuckle angle.
Reduce tilt on snowblower by
adjusting upper 3-point link.
Snowblower augers continue to
plug
Tractor ground speed is too fast. Reduce ground speed to allow
augers to clear better.
Insufficient fan speed. Increase tractor PTO speed to
540 RPM.
Snow does not discharge
properly
Insufficient fan speed. Maintain a PTO speed of 540
RPM.
Augers are overloaded with
snow.
Reduce ground speed.
Snow is wet and sticky. Reduce ground speed to allow
for better aeration of snow.
Snowblower tends to dig or float
on snow
Tilt on snowblower not adjusted
properly.
Skid Shoes not adjusted prop-
erly.
Adjust upper link on 3-point to
level the blower.
Adjust skid shoes to be even
with cutting edge.
Chute will not turn Insufficient lubrication.
Incorrect number of spacers.
Lubricate chute base and rotator
ring.
Check that 3 spacers are being
used.
Auger fails to turn Auger drive shear bolt has
sheared.
Replace auger drive shear bolt.