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Checking the Blade Brake
Clutch
Check the control bar before each use to ensure that the
blade brake clutch (BBC) system is operating properly.
Normal Test
1. Stop the engine and wait for all moving parts to stop.
2. Move the lawn mower onto a paved surface in a
non-windy area.
3. Set all 4 wheels in to the 2- / in. (70 mm) cutting
height setting (Fig. 16).
4. Set the ground speed selector to the N (Neutral)
position.
5. Take a half sheet of newspaper and crumple it into a
ball small enough to go under the deck (about 3 inches
or 76 mm in diameter) as shown in Figure 10.
Figure 10
1. 5 in. (12.7 cm)
6. Place the ball of newspaper 5 inches (12.7 cm) in front
of the lawn mower (Fig. 10).
7. Start the engine.
8. Move the control bar down to its lowest position
(Fig. 11).
Figure 11
9. Slide the control bar to the right and lift it up to about
1 inch (2.5 cm) below the handle; refer to position A in
Figure 12.
Note: The fan-like noise indicates that the lawn
mower blade is turning.
1. 1 in. (2.5 cm)
10. Release the control bar; refer to position B in
Figure 13. You should hear a "bang." The blade should
stop in 3 seconds.
756
11. Immediately push the lawn mower over the newspaper
ball.
12. Stop the engine and wait for all moving parts to stop.
13. Walk around the lawn mower to check for the
newspaper ball. If the ball did not go under the deck,
repeat steps 6 through 12.
14. Pull the lawn mower away from the newspaper. If the
newspaper ball unravels or is shredded, the blade has
not properly stopped, resulting in an unsafe operating
condition. Contact an Authorized Service Dealer.
To check for a problem with the BBC system before it
affects its normal operation, you can perform the Special
Test that follows.
m-5085
11
m-5085
Figure 12
m-5085
Figure 13
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