Adjustments - BEAL NPMS17.5/117H Notice D'emploi

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 (B). A blade that is not
sharp will cause the tips of the grass to become brown
(Figure 18).
1. Sharpen the blade (B) two times a year or every 25
hours.
2. Remove the blade (B) according to the instructions in
"How to Remove and Install the Blade".
3. Clean the blade (B) with a brush, soap and water.
Check the blade (B). 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 (B) with a file (C) (Figure 18). Make
sure you keep the original bevel angle.
5. Make sure the blade (B) is balanced. Use a screwdriver
(A) and hold the blade (B) parallel to the ground (D)
(Figure 18). A blade (B) that is balanced will stay
parallel (E) to the ground. If the blade (B) is not
balanced, the heavy end will rotate toward the ground
(D). Sharpen the heavy end until the blade (B) is
balanced.
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 (B) according to the instructions
"How to Remove and Install the Blade".
28

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 (B) to the DISENGAGE
position (A) (Figure 19).
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.
5. Disconnect the blade drive spring (B) from the blade
control rod (A). Move the blade drive spring (B) to
the middle hole (D) (Figure 20). 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 (B) to the
bottom hole (C).
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 Primary 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 (A) (Figure 19). 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 (A) are pressed tightly against the
pulleys (Figure 21).
WARNING: If the brake pads do not press tightly
against the pulleys, take the unit to an authorized
service center.
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