Murray LT155420 Manual De Instrucciones página 25

A
Figure 20: Blade adjustments
A - DISENGAGE Position
B - Blade Rotation Control ENGAGE Position
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. Disconnect the blade drive spring from the
blade control rod. Move the blade drive spring
to the middle hole (Figure 21). This will increase
the tension on the mower drive belt.
Figure 21: DISENGAGE position
A - Blade control rod
B - Blade drive spring
C - Bottom hole
D - Middle hole
E - Top hole (New Belt)
English
B
E
A
D
C
B
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.
7. Again check the quality of cut. 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 an authorized service center.
8. Move the blade rotation control to the
DISENGAGE position. Stop the engine.
Disconnect the wire from the spark plug. Check
the operation of the blade brake. Rotate the
pulleys with your hand. Make sure the brake
pads are pressed tightly against the pulleys
(Figure 22).
WARNING: If the brake pads do not press
tightly against the pulleys, take the unit to
an authorized service center.
A
Figure 22: Blade brake
A - Brake pad against pulley
9. Move the blade rotation control to the
ENGAGE position. Check the pads for the blade
brake. 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.
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 seconds. 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 an authorized service center.
12. If you replace the mower drive belt, move the
blade drive spring to the top hole (Figure 21).
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