Belt Replacement - MTD 390 Serie Manual Del Operador

Belt Replacement

Reverse Drive Belt
Your tiller has been engineered with a belt
made of special material (Kevlar Tensile) for
longer life and better performance. It should
not be replaced with an off-the-shelf belt.
Order all belts through you authorized service
dealer.
1. Disconnect and ground the spark plug
wire against the engine.
2. Remove the belt cover from the left
side of the tiller by removing the two
self-tapping screws and hex stop nut and
washer. See Figure 5-3.
Hex Stop Nut &
Washer
Self-tapping Screws
Figure 5-3
3. Remove belt from transmission pulley
and then from around the reverse idler
pulley. See Figure 5-4.
Reverse Idler
Pulley
Engine Pulley
Figure 5-4
4. To reassemble the new belt, follow the
instructions in reverse order. Be sure to
place the wider side of the belt against
transmission and idler pulley while
slimmer side goes over the engine pulley.
See Figure 5-4.
NOTE: Upon reassembly, make certain
the belt is routed over the idler pulley and
inside of belt keepers by engine pulley.
See Figure 5-4.
10 S 5— S
ection ervice
Forward Drive Belt
1. Remove the reverse drive belt as
instructed in the previous section.
2. Remove the return spring. See Figure 5-5.
Return Spring
3. Remove the idler pulley bolt and move
the belt from under the idler pulley
keeper. See Figure 5-6.
Idler Pulley Keeper
Idler Pulley
Bolt
Transmission
Pulley
Figure 5-5
Figure 5-6
4. The forward idler belt will not clear the
belt keepers near the engine pulley. You
must remove the reverse idler bracket
to allow the belt to move off of the
engine pulley. Remove the two securing
screws and move the bracket toward the
transmission pulley. Retain the screws for
reassembly. See Figure 5-7.
Figure 5-7
5. Remove the belt from the reverse
idler pulley and then from around the
transmission pulley. See Figure 5-8.
Figure 5-8
6. To reassemble the new belt, follow the
instructions in reverse order. Be sure to
place the wider side of the belt away from
the engine and transmission pulleys.
NOTE: Upon reassembly, make certain
that the idler pulley keeper is as shown in
Figure 5-6. Take note of the notch on the
bottom of the keeper and the alignment
when reassembling with the replacement
belt.
Screws
Engine Pulley