Murray 425307x51A Manuel De L'opérateur page 21

Maintenance
Adjust the Blade Rotation Control
WARNING
To prevent an injury, the blade rotation control
must operate correctly.
In normal usage, the blade rotation control will not require
an adjustment. However, if the cutting performance de-
creases or the quality of cut is poor, make the following
changes.
1. When you mow, make sure the throttle control lever
(7) is in the FAST position (see Figure 7).
2. Move the blade rotation control to the DISENGAGE
position (1) (see Figure 12).
3. Stop the engine. Disconnect the wire from the spark
plug.
4. Check the blade(s). Keep a sharp edge on the
blade(s). A blade that is not sharp will cause the tips
of the grass to become brown.
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2
5. Disconnect the blade drive spring (2) from the blade
control rod (1) (see Figure 13). Move the blade drive
spring to the middle hole (4). This will increase
the tension on the mower drive belt.
6. Attach the wire to the spark plug. Mow for a short
distance and again check the quality of cut. If
necessary, move the blade drive spring to the bottom
hole (5).
7. Again check the quality of cut. If the quality of cut has
not improved, replace the mower drive belt. See
"Replace the Primary Mower Drive Belt." If replacing
the belt does not correct the problem, take the unit to
an authorized service center.
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8. Move the blade rotation control (1) to the
DISENGAGE position (see Figure 12). Stop the
engine.
9. Check the operation of the blade brake. Rotate the
pulleys with your hand. Make sure the brake pads
(7) are pressed tightly against the pulleys (see
Figure 14).
If the brake pads do not press tightly against the
pulleys, take the unit to an authorized service
center.
10. Move the blade rotation control to the ENGAGE
position (2) (see Figure 12).
11. Check the pads for the blade brake (7) (see
Figure 14). If the pads are excessively worn or
damaged, replace the brake pad assemblies.
Correct replacement parts and assistance are
available from an authorized service center.
Figure 12
7
1
WARNING
en
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4
5
Figure 13
7
Figure 14
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