Service - MTD 390 Series Operator's Manual

Service

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 the hex stop nut
and washer. See Figure 7-1.
Hex Stop Nut
Self-tapping Screws
Figure 7-1
3. Remove the belt from the transmission pulley and then
from around the reverse idler pulley. See Figure 7-2.
Reverse Idler
Pulley
Engine Pulley
Figure 7-2
& Washer
Transmission
Pulley
4. To reassemble the new belt, follow the instructions in
reverse order. Be sure to place the wider side of the belt
against the transmission and the idler pulley while the
slimmer side goes over the engine pulley. See Figure 7-2.
NOTE: Upon reassembly, make certain the belt is routed
over the idler pulley and inside of the belt keepers by the
engine pulley. See Figure 7-2.
Forward Drive Belt
1. Remove the reverse drive belt as instructed in the previous
section.
2. Remove the return spring. See Figure 7-3.
Return Spring
Figure 7-3
3. Remove the idler pulley bolt and move the belt from under
the idler pulley keeper. See Figure 7-4.
Idler Pulley Keeper
Idler Pulley
Bolt
Figure 7-4
7
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