Toro 20330 Service Manual - Page 115

Blade Override System Bos, Blade Clutch System Bcs - bag

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BBC / BOS / BCS 4. Bend the throttle control locking tab forward so that it will provide positive engagement with the throttle control. Install the throttle control. 5. Hook the spring on the end of cable and into the bellcrank arm (Fig. 204). Disassembly The following steps are disassembly of the system, including the steps necessary to replace the blade drive and self-propel belts. 1. Drain the fuel and oil and tip the mower on its side. We recommend carburetor side up to prevent any oil or gasoline from draining into the air filter and causing hard starting. 2. Remove the two locknuts securing the blade (Fig. 205). Fig 204 3428-0173 6. Slip end of cable under screw. See page 7-16. BLADE OVERRIDE SYSTEM (BOS) BLADE CLUTCH SYSTEM (BCS) Both Toro and Lawn-Boy use the same blade clutching system on some models. On Toro it is named the Blade Override System. On Lawn-Boy it is named the Blade Clutch System. It is designed to allow the blade to stop while the engine keeps running. This is especially helpful when bagging, as the engine will not need to be restarted each time you stop to empty the bag. Fig 205 MVC-195 3. Remove the blade and blade stiffener (Fig. 206). WPM Drive Systems Manual Fig 206 MVC-197 6-29

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6-29
WPM Drive Systems Manual
6.
Slip end of cable under screw. See page 7-16.
BBC / BOS / BCS
Fig 206
MVC-197
3.
Remove the blade and blade stiffener (Fig. 206).
Fig 205
MVC-195
The following steps are disassembly of the system,
including the steps necessary to replace the blade drive
and self-propel belts.
1.
Drain the fuel and oil and tip the mower on its side.
We recommend carburetor side up to prevent any
oil or gasoline from draining into the air filter and
causing hard starting.
2.
Remove the two locknuts securing the blade (Fig.
205).
BLADE OVERRIDE SYSTEM (BOS)
BLADE CLUTCH SYSTEM (BCS)
Both Toro and Lawn-Boy use the same blade clutching
system on some models. On Toro it is named the Blade
Override System. On Lawn-Boy it is named the Blade
Clutch System.
It is designed to allow the blade to stop while the engine
keeps running. This is especially helpful when bagging,
as the engine will not need to be restarted each time you
stop to empty the bag.
Disassembly
Fig 204
3428-0173
4.
Bend the throttle control locking tab forward so that
it will provide positive engagement with the throttle
control. Install the throttle control.
5.
Hook the spring on the end of cable and into the
bellcrank arm (Fig. 204).