Service Manual
Maintenance Traction Drive Belt Adjustment
(cont'd)
NOTE:
When adjusting cable, always rotate nut
one turn at a time.
3.
Tighten the upper jam nut against the bracket.
4.
Check the tension of the belt by operating the
machine. If the belt slips, repeat the procedure.
CAUTION: Do not adjust the belt too tight
because
it
may cause the snowthrower to creep
when traction lever is in the disengaged position.
If
this occurs, readjust by loosening belt tension.
Maintenance Replacing Drive Belts
If
the auger/impeller belt or traction belt become worn,
glazed, stretched, oil-soaked, or otherwise defective,
belt replacement is required.
1.
Pull wire
off
the spark plug and make sure
it
does
not contact the plug accidentally.
2.
Remove the three thread forming screws holding
the belt cover in place, and slide the belt cover up
cables.
3.
Move the speed shift control to
N,
neutral.
4.
Remove the two flanged head capscrews
securing the idler pulley assembly to the engine
frame. Remove the idler pulley assembly. See
Figure
6.
Figure
6
5.
Remove the capscrew and lockwasher securing
the half sheave to front of pulley assembly.
6.
Slide auger/impeller half sheave and belt
off
crankshaft and remove belt from impeller pulley.
7.
If
replacing the traction belt, slide the mid section
of the on pulley and belt
off
crankshaft and remove
belt from transmission pulley.
8.
On the control cable which corresponds to the
belt being replaced, loosen the jam nuts securing
cable to bracket. Cable must
be
free to slide in the
bracket when changing the belt(s).
9.
Reinstall the belts by reversing procedure. Make
sure tabs
in
half sheave are inserted into the
mounting grooves in the auger/impeller pulley
when reinstalling.
NOTE:
Make sure the idler pulleys are aligned
with the belts when reinstalling idler pulley
assembly.
10.
Readjust the belts, referring to Maintenance
Impeller Drive Belt Adjustment or Maintenance
Traction Drive Belt Adjustment, pages
37
and
38.
CAUTION: Improper adjustment may cause
injury
if
auger/impeller turns when the lever
disengages. Use only genuine Toro replacement
parts.
Maintenance Drive Chain Adjustment
The drive chain must be adjusted to maintain
1/8-3/8
of
an inch deflection at mid span between transmission
and axle sprocket. Check chain deflection after every
25
hours of operation.
1.
Check deflection of the chain by lifting up on the
chain with moderate pressure at mid span. There
should be
1/8-3/8”
deflection.
If
deflection is not as
specified an adjustment is required.
See
Figure
7.
Deflection
3/8”
Figure
7
Maintenance
38
I
Power Shift Snowthrowers