Murray 309007x8B - Manual (Page 25)

MAINTENANCE
25 F−050611L
HOW TO CHECK 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 decreases or the
quality of cut is poor, make the following changes.
1. When you mow, make sure the throttle control in in the FAST
position.
2. Move the blade rotation control to the DISENGAGE position
(Figure 18).
3. Stop the engine. Disconnect the wire from the spark plug.
Blade Rotation Control
Engage Position
Disengage
Position
Figure 18
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.
5. If the quality of cut has not improved, replace the mower drive
belt. See “How To Replace The Mower Drive Belt”. If replacing
the belt does not correct the problem, take the unit to a Sears
or other qualified service center.
6. Move the blade rotation control to the DISENGAGE posi-
tion. Stop the engine. Disconnect the wire from the spark plug.
7. Check the operation of the blade brake. Rotate the pulley with
your hand. Make sure the brake pad is pressed tightly against
the pulley (Figure 19).
WARNING: If the brake pad does not press tightly
against the pulley, take the unit to a Sears or other qu-
alified service center.
8. Move the blade rotation control to the ENGAGE position.
9. Check the pad for the blade brake. If the pad is excessively
worn or damaged, replace the brake pad assemblies. Correct
replacement parts and assistance are available from a Sears
service center.
10. Attach the wire to the spark plug. Mow for a short distance and
again check the operation of the blade rotation control.
11. When you move the blade rotation control to the
DISENGAGE position, all movement will stop within five se-
conds. If there is movement of the belt or the blades continue
to rotate, engage and disengage the blade rotation control
five times to remove any excess rubber from a new mower
drive belt. If you need assistance, take the unit to a Sears or
other qualified service center.
Figure 19
Blade Brake
(Pad Against Pulley)