Service Manual

10-3
WPM Drive Systems Manual
SELF-PROPELBELTREPLACEMENT
21”CastDeckMowers–3Speed
Transmission
Toro and Lawn-Boy models
If necessary, drain the fuel and oil to prevent spillage.
Tip the mower on its side, air lter side up. Remove the
belt cover, just behind the engine on top of the mower, to
access the transmission. DO NOT bend the belt guides
or force the belt between the pulley and belt guide.
Loosen or remove the mounting screws to pivot the belt
guides out of the way. If the belt guides are bent or out
of place, the belt may have a tendency to jump and may
not disengage properly. It may be necessary to remove
the blade to replace the belt. See the on the “Three-
Speed Transmission” section starting on page 5-1.
Follow the procedure in reverse order to reassemble.
20”,21”,22”,48cm,50cm,&
53cmSteel&CastDeck–General
Transmission
Toro and Lawn-Boy models
See the appropriate section in the “General Trans-
mission” chapter, starting on page 6-1, for self-propel
belt replacement instructions.
21”Toro&Lawn-BoyMowerswith
BladeBrakeClutch
Part of the BBC must be disassembled to access the
self-propel belt. See the “BBC, BOS, BCS” section
starting on page 8-1 for more information.
21”ToroMowerswithBladeOverride
System(BOS)&Lawn-BoyMower
withBladeClutchSystem(BCS)
Part of the BOS or BCS must be removed to replace the
self-propel belt. See the “BOS, BCS” section on page
8-29 for more information. The Lawn-Boy Insight has a
black access cover just to the rear of the engine on top
of the chassis. Remove it for easy access to the top of
the transmission.