White Outdoor 933R, 933E manual Blade Brake Replacement, Blade Drive Belt Adjustment

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Section 5: Maintenance

WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Remove ignition key on electric start models. Failure to follow these instructions can result in serious personal injury or property damage.

BLADE BRAKE REPLACEMENT

Follow this procedure to install a new blade brake.

To Remove Blade Brake:

1.Stop engine, wait for all parts to stop moving, and disconnect spark plug wire.

2.Remove belt cover as described in “Belt Cover Removal” instructions.

3.Remove hardware (G, Figure 5-8) securing blade brake (H).

4.Remove old brake (H) from idler arm (I).

Adjust idler in direction of arrow to tighten blade drive belt

J

1/8"

D

E

F

To Install Brake:

1.Position new brake (H) in place on idler arm (I).

2.Center brake in sheave groove and se- cure brake (H) with hardware (G) re- moved earlier.

3.Reinstall belt cover securely.

4.Test operation of blade brake (see

“Blade Brake Control Test” in Operation section).

BLADE DRIVE BELT

ADJUSTMENT

If the blade drive belt is slipping due to lack of belt tension, follow the steps below.

1.Stop engine, wait for all parts to stop moving, and disconnect spark plug wire.

2.Remove belt cover as described in “Belt Cover Removal” instructions.

3.With mower on level ground, adjust

blade cutting height at about 3" (measure from ground to flat portion of blade).

4. With the Blade Drive Control (Figure

5-7) in the disengaged position, set a gap of 1/8" between the spring (F, Figure 5-9) and flat washer (E) by adjusting the nut (D).

5.Reinstall the belt cover securely.

Figure 5-9: Blade drive adjustment.

6.Test the operation of the blade brake (see “Blade Brake Control Test” in the Operation section).

7.If the drive belt slips during opera- tion, it may be necessary to relocate idler (J, Figure 5-9) in the slot provided in the mounting bracket. With the engine stopped and the spark plug wire dis- connected, loosen the hardware on the idler (J) and slide it forward to take up slack in the belt.

8.Engage the blade drive and measure the distance (X, Figure 5-8) between the centers of pulleys (K) and (L). The dis- tance should be 5-1/2 to 5-5/8". After obtaining the correct dimension, reinstall the belt cover securely and test the oper- ation of the blade brake.

BLADE DRIVE CONTROL LEVER ADJUSTMENT

Make the following adjustment if the Blade Drive Control Lever releases dur- ing operation.

1.Stop engine, wait for all parts to stop moving, and disconnect spark plug wire.

2.Engage the Operator Presence Control and the Blade Drive Control. Without re- leasing the controls, look inside the cutout at the rear of the frame and make

sure the Operator Presence Control latches (A and B, Fig. 5-10) are fully engaged at point (C). If they are not fully engaged, improper operation or prema- ture wear could result. To adjust, loosen hex nut (D) and shorten length of control rod (E). To avoid over-adjusting, turn rod only 1 to 2 turns per adjustment.

3.Tighten hex nut securely after adjust- ing control rod.

4.Test by releasing the Operator Presence Control. If properly adjusted, the Blade Drive Control will disengage when the Operator Presence Control is released. Re-adjust as necessary by repeating Steps 2 and 3.

 

C

E

A

 

 

B

 

D

Figure 5-10: Blade Drive Control Lever adjustment.

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Contents Model 933R Shown Operator’s ManualTable of Contents Safe Operation Practices for Walk-Behind Mowers SafetyStop the blade when crossing gravel drives, walks, or roads Cleaning the mower or unclogging the chuteUse only an approved container SafetyDo not mow excessively steep slopes On top, rear of engine platform Safety DecalsAttach Handlebars to Engine Deck AssemblyInspection After Delivery Unpacking MowerContents of Hardware Bag AssemblyProperty damage + USembling Unit Control Result in severe personal injury orAttach Blade Drive Control Rod Attach and Adjust Gear Select LeverAttach Operator Presence Control Rod Add Motor Oil to Engine After Assembling and Before Using UnitBlade Drive Control Features and ControlsOperator Presence Control Cutting Height Control Lever Features and ControlsGear Select Lever Wheel Drive ControlEngine Recoil Starter Ignition/Starter Switch Electric Start ModelStart Starts engine. Release key when engine starts Engine Throttle ControlBefore Operating Mower Pre-Operation ChecklistRelease all controls before adjusting the cutting height OperationIgnition/Starter OperationStarting and Stopping Engine To Start the EngineTo Stop the Blades To Stop the EngineEngaging the Blades To Engage the BladesMowing Tips and Hints Making TurnsBlade Brake Control Test Changing Oil MaintenanceEngine OIL Checking Oil LevelSpark Plug MaintenanceEngine Cleaning AIR Cleaner ServiceBelt Cover Removal Tipping Mower for ServiceBlade Spindle Belt Replacement Engine StorageBlade Drive Disengaged Blade Drive Engaged Blade Drive Belt ReplacementWith mower on level ground, adjust Blade Brake ReplacementBlade Drive Belt Adjustment Blade Drive Control Lever AdjustmentWheel Brake Adjustment Wheel Drive Belt ReplacementWheel Drive Belt Adjustment Rotate shift rod I, Figures 5-14 Follow this procedure to adjust neutral on the transmissionRemove cotter pin securing shift link P, -15 to shift rod Mower Blades OFF-SEASON Storage Cleaning Underside Mower DeckInspection/Cleaning of Mower Deck LubricationLubrication Chart Maintenance Chart Overheats.Engine SymptomIs available from your local White Outdoor Roughly.runsEnginePage MANUFACTURER’S Limited Warranty for
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