15
Publication: ZTB-080112
M-B Companies, Inc. 11/14/12
iNTRODUcTiON
ADjUSTMENT AND SERvicE
REMOvE RiBBON AND gEARBOx
The two ribbons and gearbox are held in place with two shafts on the
ends and a bracket on the top of the gearbox.
WARNiNg!
When making repairs or
adjustments on the snowblower,
the tractor engine must be off if the
snowblower is attached.
1. Remove the bolts at each end that hold the shaft in the bearing.
2. Pull the two shafts out. The bearings may need to be removed.
3. Remove the bolts that hold the gearbox to the top bracket.
NOTE:
If the impeller is going to be removed the brackets will be
removed
4. The shaft from the gearbox to the impeller is connected with a
shear bolt. Remove the shear bolt
5. The ribbon/gearbox assembly can be pulled straight out.
6. To remove the ribbons from the gearbox, the shaft bolts are
removed.
Shaft
Shear Bolt
Bearing
Figure 17
The reassembly is the reverse order of the removal.
cAUTiON!
A shear bolt must be used to
connect the impeller to the
gearbox. Do not overtighten. The
outer tube must not tighten onto
the inner shaft. failure to follow
this instruction may damage the
snowblower.
REMOvE ThE iMPELLER
Access to the impeller is gained by first removing the ribbon/gearbox
assembly.
1. Remove the V-belt from the drive pulley. Remove the shear bolt
pulley.
2. Loosen the set screw in the bearing.
3. Pull the impeller out.
Shear Bolt
Figure 18
To reassemble:
1. Clean the shaft. Apply a light coat of grease to prevent
corrosion.
2. Place spacer over the shaft and insert the shaft into the bearing.
Tighten the bearing set screw.
3. Install the pulley.
4. Install shear bolt.
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