Adjustments - Murray LT155420 Manual De Instrucciones

WARNING: Always keep the nut tight that
holds the blade. A loose nut or blade can
cause an accident.
9. Tighten the nut that holds the blade to a torque
of 35 foot pounds (47,5 Nm).
10. Install the mower housing. See "How To Install
The Mower Housing".
A
B
Figure 18: Blade assembly
A - Blade adapter
B - Belleville washer (Outside rim must be against the
blade.)
C - Nut
D - Washer
E - Blade
How to Sharpen the Blade
WARNING: Vibration can be caused if the
blade is not correctly balanced or if the
blade is damaged. A blade that is damaged
with cracks can break and cause an
accident.
Keep a sharp edge on the blade. A blade that is not
sharp will cause the tips of the grass to become brown.
1. Sharpen the blade two times a year or every 25
hours.
2. Remove the blade according to the instructions
in "How To Remove And Install The Blade".
3. Clean the blade with a brush, soap and water.
Check the blade. Look for cracks, nicks, or other
damage. Replace a badly worn or damaged
blade with an original equipment blade. See an
authorized service center in your area.
4. Sharpen the blade with a file (Figure 19). Make
sure you keep the original bevel angle.
5. Make sure the blade is balanced. Use a
screwdriver and hold the blade parallel to the
ground (Figure 19). A blade that is balanced will
stay parallel to the ground. If the blade is not
balanced, the heavy end will rotate toward the
ground. Sharpen the heavy end until the blade
is balanced.
English
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6. A new blade will cut better than a badly worn
blade. Every three years, have an authorized
service person inspect the blade or replace the
old blade with an original equipment blade.
7. Assemble the blade according to the instructions
"How To Remove And Install The Blade".
E
A
D
C
Figure 19: Sharpening the blades
A - Screwdriver
B - Blade
C - File
D - Ground
E - Blade is balanced when parallel to the ground

Adjustments

How to 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 decreases or the quality of cut is poor,
make the following changes.
1. When you mow, make sure the throttle control is
in the FAST position.
2. Move the blade rotation control to the
DISENGAGE position (Figure 20).
3. Stop the engine. Disconnect the wire from the
spark plug.
E
D
B
C
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