30
Snowblower Reduction Sprockets
A sprocket should be replaced
when the teeth become asymmetric
(when the front side of a tooth is a
different shape than the back side of the tooth) as shown in Figure 4.6.
Symmetric (Acceptable)
Asymmetric (Replace)
Figure 4.6: Reduction Sprocket Wear
NOTE:
Generally, a small sprocket wears faster than a large sprocket.
Replacing Drive Shaft with Sprocket (P/N I153)
1. Remove the PTO guard and reduction chain. Refer to
REPLACING/REPAIRING PARTS - Snowblower
Reduction Chain
in this section.
2. Remove the bolt and set screw retaining the U-joint shaft assembly to the drive shaft, and remove the
U-joint shaft assembly from the drive shaft. Remove the three (3) carriage bolts, nuts and washers from
the rear bearing flange.
3. Remove the four (4) carriage bolts and nuts securing the reduction box assembly to the frame and remove
the reduction box assembly.
4. Loosen the set screws that secure the two (2) bearing collars to the shaft, and remove the shaft from the
reduction box. Also remove the rear bearing from the shaft.
5. Install the new drive shaft (with sprocket) into the reduction box by reversing the removal procedure.
6. Reinstall the reduction box and chain by reversing the removal procedure.
7. Lubricate and tension the reduction chain. Refer to
LUBRICATION - Snowblower Reduction Chain
, and
ADJUSTMENTS - Snowblower Reduction Chain Tension
in this section. Reinstall the PTO guard.
Summary of Contents for H12
Page 41: ...34 This page left intentionally blank...
Page 50: ...43 OPERATOR S NOTES...
