Under Deck Components Disassembly (Toro Vacu Power/Lawn-Boy Medallion) - Toro 20330 - Low Wheel Walk Power Mower Service Manual
Walk behind power mower drive systems
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- Parts catalog (12 pages) ,
- Operator's manual (33 pages)
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Under Deck Components Disassembly
(Toro Vacu Power/Lawn-Boy Medallion)
1. Stop the engine and disconnect the spark plug lead
to prevent accidental starting. Drain fuel.
2. Remove the 2 fl anged nylon locknuts securing the
blade to the bearing block and remove the anti-scalp
cup, the blade, the blade spacer, and the lower BBC
screen (Fig. 169).
3. Remove the 4 fl anged head self-tapping screws
securing the lower BBC cover to the housing, and
remove the lower BBC cover.
4. Before disassembling further, check to make sure
that the BBC components are functioning normally.
Make sure that the brake and brake drum fully
disengage when the control bar is cocked, then
raised. Make sure that the BBC fl ywheel and the
brake drum rotate together when the control bar
is raised. Make sure that the belt loosens properly
when the control bar is lowered. Repair or replace
parts as required.
WPM Drive Systems Manual
Fig 169
3428-0099
BBC / BOS / BCS
5. If further disassembly is required, begin by removing
the crankshaft nut. An impact wrench works best.
However, if you must remove it manually, use a large
screwdriver or bar to wedge the BBC fl ywheel while
removing the nut (Fig. 170).
Note: Be careful not to damage the bearing seal
when removing this nut, or premature bearing
failure could result.
6. Pivot the brake plate counterclockwise slightly and
remove the bearing block and brake drum from the
crankshaft (Fig. 171).
Fig 170
MVC-724
Fig 171
MVC-726
6-15
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