Briggs & Stratton Snapper LT75 Serie Manual Del Operador página 24

Maintenance
Remove and Install the Blade
1. Remove the mower deck. See the instructions
to "Remove and Install the Mower Deck".
2. Use a piece of wood to keep the blade from
rotating.
WARNING
Before you inspect or remove the blade, disconnect
the wire to the spark plug. If the blade hits an
object, stop the engine. Check the unit for damage.
The blade has sharp edges. When you hold the
blade, use gloves or cloth material to protect your
hands.
3. Remove the nuts (2), washers (3), and bolts (4)
that hold the blade (1) (see F F igure 21).
4. Check the blade according to the instructions for
"Inspect Blade". Replace a badly worn or damaged
blade with an original equipment blade. See an
authorized service center in your area.
5. Clean the top and bottom of the mower deck.
Remove all the grass and debris.
6. Mount the blade on the mandrel (5).
7. Mount the blade so that the hi-lift edges are up. If
the blade is upside down, the blade will not cut
correctly and can cause an accident.
8. Fasten the blade with the original bolts (4), wash-
ers (3), and nuts (2).
9. Tighten the nuts that hold the blade to 30 ft-lbs
(41,5 Nm).
10. Install the mower deck. See "Remove and Install
the Mower Deck".
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 re-
quire an adjustment. However, if the cutting perform-
ance 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 (see F F igure 8).
2. Move the blade rotation control to the DISEN-
GAGE position (see F F igure 9).
3. Turn the ignition switch to the OFF positon to stop
the engine (see F F igure 18).
4. Disconnect the wire from the spark plug.
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5. 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.
6. If the quality of cut has not improved, replace the
mower drive belt. See "Remove and Install the
Mower Drive Belt". If replacing the belt does not
correct the problem, take the unit to an authorized
service center.
7. 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 dis-
engage 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.
Check and Adjust the Clutch
If the motion drive belt is loose, the clutch will slip when
going up a hill, pulling a heavy load, or the unit will not
move forward. Adjust the clutch as follows.
WARNING
Before you make an inspection, adjustment, or
repair to the unit, disconnect the wire to the spark
plug. Remove the wire from the spark plug to
prevent the engine from starting by accident.
1. Check the routing of the motion drive belt. Make
sure the belt is installed correctly and is inside all
the belt guides.
2. Remove the cotter pin (1) and washer (2) from the
adjustable nut (3) (see F F igure 22).
en
2
1
3
5
4
Figure 22