Murray 425307x51A Manuel De L'opérateur page 22

Maintenance
12. Attach the wire to the spark plug. Mow for a short
distance and again check the operation of the blade
rotation control.
13. 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.
14. If you replace the mower drive belt, move the
blade drive spring (2) to the top hole (3) (see
Figure 13).
Check and Adjust the Clutch
If the motion drive belt is loose, the clutch will slip when
going up a hill or 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), washer (2) and brake
spring (3) from the adjustable nut (4) (see
Figure 15).
3. Disconnect the adjustable nut from the brake lever
assembly (5) and the parking brake latch (6).
4. Align the hole in the brake lever with the hole in the
frame. Hold the brake lever in place with a 6 mm pin
or bolt (7).
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5. Pull the clutch rod forward until tight. Turn the
adjustable nut until the nut will fit through the hole in
the brake lever.
6. Assemble the adjustable nut to the parking brake
latch, brake lever and brake spring. Fasten with the
washer and cotter pin.
7. Remove the 6 mm pin or bolt.
8. If the belt still slips after the clutch has been adjusted,
then the motion drive belt is worn or damaged and
must be replaced. See "Replace the Motion Drive
Belt."
6
3
2
1 5
7
en
4
Figure 15