Maintenance And Repair Instructions; Inspecting/Replacing The Drive Belt - TrimmerPlus ST720r Manual Del Operador

MAINTENANCE AND REPAIR INSTRUCTIONS

INSPECTING/REPLACING THE DRIVE BELT

When servicing the snow thrower use only original MTD
replacement parts. Inspect the drive belt once a year or
every 50 hours of operation, whichever comes first, for
wear. If the drive belt needs to be replaced, use the
following instructions.
1. Remove the flange lock nut from the belt case cover
with a wrench or nut driver (Fig. 7).
2. Remove the seven (7) screws from the belt case
cover using a #T20 Torx bit or flat blade screwdriver
(Fig. 7).
3. Pull the belt tensioner (idler arm) away from the drive
pulley. Remove the damaged or broken belt from the
driven pulley and drive pulley inside of the housing
(Fig. 8).
4. Loop the new belt around the drive pulley and driven
pulley (Fig. 8). Pull the belt tensioner (idler arm) away
from the drive pulley to install the belt around the
drive pulley.
NOTE: Make sure the washer is still in place on the
driven pulley shaft prior to reinstalling the belt
case cover (Fig. 8).
Cover
Screws (7)
Belt Cover
Case
Flange Lock Nut
Fig. 7
Belt Tensioner
(Idler Arm)
Belt
Driven
Pulley
5. Reinstall the cover with the seven (7) screws. To
make installation easier, place the narrow part of the
cover into the recess of the housing. Install the top
two screws, then push the rest of the cover down
into the recess and over the rotor shaft. Torque all
seven (7) screws to 18-23 in•lb (2.0-2.5 N•m).
6. Install the flange lock nut. Torque the nut to 80-100
in•lb (9.0-11.2 N•m).
NOTE: If the flange lock nut is damaged, do not replace
it with a standard nut. Replace only with an
original MTD replacement part.
Drive Pulley
Washer
Fig. 8
9