General Information; Drive Belt Removal - MTD 31AS250-700 Service Manual

31AS250-700
SNOW-THROWER MODEL 31AS250-700 SERIAL #
1E074B20022

GENERAL INFORMATION

• Single Stage snow thrower
• 4.5 horsepower Tecumseh HSK Air Cooled Two
cycle engine with Electric Start
• To operate you need to use a clean, high quality,
2-cycle oil mixed at a ratio of 50:1. Use if NMMA,
TC-Wll or TC-W3, JASO FB or FASO FC classi-
fied oil is recommended. A 32:1 fuel mix is rec-
ommended if NMMA oil is not available.
NOTE: These materials are prepared for use by
trained technicians who are experienced in the
service and repair of this type of equipment
described in this publication, and are not
intended for use by untrained or inexperienced
individuals. All such individuals should seek the
assistance of an authorized service dealer.
WARNING: Before servicing, repair, or inspect-
ing, disengage all clutch levers and stop engine.
Wait until all moving parts have come to a com-
plete stop. Disconnect spark plug wire and
ground it against the engine to prevent unin-
tended starting.
NOTE: Some procedures require you to tip the
snow thrower up on the front of the auger hous-
ing. If there is fuel in the gas tank, place a piece
31AS250-700 Snow Thrower
of plastic wrap over the gas tank opening and
screw the cap back on the tank tightly. This
should keep the gas from leaking out of the cap
or vent.
During the service of this Snow Thrower there is no
reason to remove the wheel assemblies, other than
complete wheel replacement. The push cap on the
wheels must be replaced when removed.
1.

DRIVE BELT REMOVAL

1.1. Remove the (5) screws using a 3/8 socket and
ratchet wrench from the perimeter of the belt
cover and remove the cover for access to the
belt drive assembly.
Perimeter Screws
NOTE: The front screw is shorter than the other
four and is a fine thread. It is necessary that this
screw be used to allow for clearance to the
auger assembly.
1.2. Loosen or remove the ball bearing idler using a
7/16 socket and ratchet wrench. Notice the posi-
tion of the outer washer or belt retainer; the flat
side should be facing up, to allow clearance
1