MTD 31AE640F352 Manual Do Utilizador

13

Before servicing, repairing, or

inspecting, disengage all clutch levers and
stop engine. Wait until all moving parts have
come to a complete stop. Disconnect spark
plug wire and ground it against the engine to
prevent unintended starting. 

The augers are secured to the spiral shaft with two 
shear bolts and hex lock nuts. If the snow thrower hits a 
foreign object or ice jam, hex bolts will shear.

•

If the augers will not turn, check to see if the bolts 
have sheared. Two replacement shear bolts and 
hex lock nuts have been provided in the snow 
thrower’s hardware pack. For future use, order part 
number 710-0890A (shear bolt 5/16-18 x 1.5") and 
712-0429 (hex lock nut 5/16-18).

The shave plate and skid shoes on the bottom of the 
snow thrower are subject to wear. They should be 
checked periodically and replaced when necessary. 

•

To remove skid shoes, remove the four carriage 
bolts, bell washers and hex nuts which attach them 
to the snow thrower. Reassemble new skid shoes 
with the four carriage bolts, bell washers (cupped 
side goes against skid shoes) and hex nuts. Make 
certain the skid shoes are adjusted to be level.

•

To remove shave plate, remove carriage bolts, bell 
washers and hex nuts which attach it to the snow 
thrower housing. 

•

Reassemble new shave plate, making sure heads 
of the carriage bolts are to the inside of the housing. 
Tighten securely.

Disconnect the spark plug wire

from the spark plug and ground.

NOTE:  It is necessary to remove both auger belts in
order to change either one. If changing just one belt, be
certain to check the condition of the other belt.

•

Remove the plastic belt cover on the front of the 
engine by removing the two self-tapping screws. 
See Figure 13.

•

Drain the gasoline from the snow thrower, or place 
a piece of plastic under the gas cap.

•

Tip the snow thrower up and forward so that it rests 
on the housing.

•

Remove six self-tapping screws from the frame 
cover underneath the snow thrower. See Figure 13 
for the location of the hardware.

•

Roll the front and rear auger belts off the engine 
pulley. See Figure 14.

•

Unhook the idler spring from the hex bolt on the 
auger housing. See Figure 15.

•

Back out the stop bolt to allow the belts to slip 
between the bolt and auger pulley. See Figure 16.

NOTE: It may be necessary to loosen the six hex nuts
that fasten the frame to the auger housing. 

•

Lift the rear auger belt from the auger pulley, and 
slip belt between the support bracket and the auger 
pulley. See Figure 15. Repeat this step for front 
auger belt .

•

Replace both auger drive belts by following 
instructions in reverse order.