Murray 425307x51A Manuel De L'opérateur page 20

Maintenance
General Recommendations
1. The owner's responsibility is to maintain this product.
This will extend the life of the product and is also
necessary to maintain warranty coverage.
2. Check the spark plug and drive brake, lubricate the
unit, and clean the air filter once a year.
3. Check the fasteners. Make sure all fasteners are
tight.
4. Follow the Maintenance section to keep the unit in
good operating condition.
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.
NOTE: Torque is measured in foot pounds (metric
Nm). This measurement describes how tight a nut or
bolt must be. The torque is measured with a torque
wrench.
Inspect the Blade
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.
If you keep the blade (1) sharp and inspect the blade for
damage, the blade will cut better and be more safe to
operate (see Figure 11). Frequently check the blade for
excessive wear, cracks or other damage.
Frequently check the nut (3) that holds the blade (1).
Keep the nut tight. If the blade hits an object, stop the en-
gine. Disconnect the wire to the spark plug. See if the
blade is bent or damaged. Check the blade adapter (5) for
damage.
Before you operate the unit, replace damaged parts
with original equipment parts. See the authorized
service center in your area. Every three years, have an
authorized service person inspect the blade or replace
the old blade with an original equipment part.
20
7
1
2
3
Remove and Install the Blade
1. Remove the mower housing. See "Remove and
Install the Mower Housing".
2. Use a piece of wood to keep the blade from
rotating.
3. Remove the nut (3) that holds the blade (1)
(see Figure 11).
4. Check the blade and the blade adapter (5). See
"Inspect the 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 housing.
Remove all the grass and debris.
6. Mount the blade and blade adapter on the mandrel
(6).
7. Mount the blade so that the hi-lift edges (7) 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 washers and nut.
Make sure the outside rim of the Belleville washer (2)
is against the blade.
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 30
foot pounds (41,5 Nm).
10. Install the mower housing. See "Remove and Install
the Mower Housing."
en
6
5
4
Figure 11