Murray 405001x78B manual Brake Figure

Models: 405001x78B

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Brake (Figure 12)

WARNING: Always keep the nut (3) tight that holds the blade (1). A loose nut or blade can cause an

accident.

9.Tighten the nut (3) that holds the blade (1) to a torque of 30 foot pounds (41,5 Nm).

10.Install the mower housing. See “How To Re- move The Mower Housing”.

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 cut- ting performance decreases or the quality of cut is poor, make the following changes.

1.When you mow, make sure the throttle con- trol in in the FAST position.

2.(Figure 8) Move the blade rotation control to the DISENGAGE position (1).

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.(Figure 9) Disconnect the blade drive spring (2) from the blade control rod (1). Move the blade drive spring (2) to the middle hole (4). 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 (2) to the bottom hole (5)

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 Mower Drive Belt”. If the replacing the belt does not correct the problem, take the unit to an auth- orized service centre.

8.Move the blade rotation control to the DIS- ENGAGE position. Stop the engine.

9.(Figure 10) Check the operation of the blade brake. Rotate the pulleys with your hand. Make sure the brake pads (7) are pressed tightly against the pulleys

WARNING: If the brake pads (7) do not press tightly against the pulleys, take the unit to an author-

ized service centre.

10.(Figure 8) Move the blade rotation control to the ENGAGE position (2).

11.(Figure 10) Check the pads for the blade brake (7). If the pads are excessively worn or damaged, replace the brake pad assem- blies. Correct replacement parts and assist- ance are available from an authorized service centre.

12.Attach the wire to the spark plug. Mow for a short distance and again check the operation of the blade rotation control.

F-030771L

13.When you move the blade rotation control to the DISENGAGE position, all movement will stop within five seconds. If there is move- ment of the belt or the blades continue to ro- tate, engage and disengage the blade rotation control five times to remove any ex- cess rubber from a new mower drive belt. If you need assistance, take the unit to an authorized service centre.

14.(Figure 9) If you replace the mower drive belt, move the blade drive spring (2) to the top hole (3).

How To Adjust The Shift Lever (Figure 18)

If the NEUTRAL position on the shift lever does not match neutral on the gearbox, adjust the shift lever as follows.

1.Stop the engine.

2.Disconnect the adjuster nut (2) from the shifter bracket (3).

3.Make sure the shift lever is in the NEUTRAL position.

4.Push the unit forward. Make sure the gear- box is in neutral.

5.To align the adjuster nut (2) with the hole in the shifter bracket (3), turn the adjuster nut

(2).

6.Connect the adjuster nut (2) to the shifter bracket (3).

7.Make sure the NEUTRAL position on the shift lever matches neutral on the gearbox.

How To Check And Adjust The Clutch (Figure 11)

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 in- spection, 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).

3.Disconnect the adjustable nut (4) from the brake lever assembly (5) and the parking brake latch (6).

4.Align the hole in the brake lever (5) with the hole in the frame. Hold the brake lever (5) in place with a 6 mm pin or bolt (7).

5.Pull the clutch rod forward until tight. Turn the adjustable nut (4) until the nut will fit through the hole in the brake lever (5).

6.Assemble the adjustable nut (4) to the parking brake latch (6), brake lever (5) and brake spring (3). Fasten with the washer (2) and cotter pin (1).

7.Remove the 6 mm pin or bolt (7).

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 “How To Replace The Motion Drive Belt”.

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How To Check And Adjust The Drive

Brake (Figure 12)

Completely push the clutch/brake pedal forward. Set the parking brake. Move the shift lever to the neutral (N) position. Push the unit. If the rear wheels rotate, adjust or replace the brake pads. Adjust the drive brake (1) as follows.

1.The location of the drive brake (1) is on the right side of the gearbox (3).

2.Make sure the parking brake is set and the shift lever is in neutral (N). Turn the hex nut

(2) in a clockwise direction until the rear wheels do not turn when the unit is pushed forward.

3.Release the parking brake and push the unit. If the unit does not roll, turn the hex nut (2) in a counter-clockwise direction until the unit rolls.

4.Set the parking brake. Push the unit. If the rear wheels do not turn, the drive brake (1) is correctly adjusted. Release the parking brake.

WARNING: If you cannot correctly adjust the drive brake, replace the brake pads. Correct replacement

parts and assistance are available from an authorized service centre.

How To Remove The Battery (Figure 4)

To charge or clean the battery (1), remove the battery (1) from the unit as follows.

WARNING: To prevent sparks, dis- connect the black battery cable (8) from the negative (-) terminal be-

fore you disconnect the red cable (5).

WARNING: The battery contains sulphuric acid which is harmful to the skin, eyes and clothing. If the

acid gets on the body or clothing, wash with water.

1.Disconnect the black cable (8) from the negative (-) terminal.

2.Disconnect the red cable (5) from the posi- tive (+) terminal (4).

3.Lift the battery tray (3) and the battery (1) out of the unit.

How To Charge The Battery (Figure 4)

WARNING: When you charge the battery, do not smoke. Keep the battery away from any sparks. The

fumes from the battery acid can cause an explosion.

1.Before you charge the battery (1), remove the battery (1).

2.To charge the battery (1), use a 12 volt bat- tery charger. Charge at a rate of 6 amperes for 1 hour.

3.Install the battery (1).

WARNING: To prevent sparks, fasten the red cable to the positive

(+)terminal before you connect the black cable.

4.Fasten the red cable (5) to the positive (+) terminal (4) with the fasteners as shown.

5.Fasten the black cable (8) to the negative (-) terminal with the fasteners as shown.

How To Level The Mower Housing (Figure 13 and Figure 14)

If the mower housing is level, the blade will cut easier and the lawn will look better.

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Murray 405001x78B manual Brake Figure