Snapper NP2167520B (7800438) Mower Blade Replacement, Standard Blade Wear Limit, Blade Sharpening

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Mower Blade Replacement

Maintenance (Continued)

!

WARNING

!

DO NOT attempt any maintenance, adjustments or service with engine and blade running. STOP engine and blade. Disconnect spark plug wire and secure away from spark plug. Engine and components are HOT. Avoid serious burns, allow sufficient time for all components to cool. Wear heavy leather gloves when handling or working around cutting blades. Blades are extremely sharp and can cause severe injury.

Mower Blade Replacement

Standard Blade Wear Limit

1.Inspect the blade (Figure 18) frequently for signs of excessive wear or damage:

(A)New blade

(B)Wear limit (notch starts)

(C)Dangerous condition! Do not use on the mower! Replace with a new blade.

A

B

Maintenance	C

Figure 18: Standard blade wear limits

Ninja Blade Wear Limit

1.Inspect the blade (Figure 19) frequently for signs of excessive wear or damage:

(A)New blade

(B)Wear limit (cracks or notches begin to appear on

tip)

(C)Dangerous condition! Do not use on the mower! Replace with a new blade.

!

WARNING

!

DO NOT use a cutting blade that shows signs of excessive wear or damage. Refer to the Section entitled “MOWER BLADE REPLACEMENT” for proper blade inspection and service procedures.

A

B

C

Figure 19: Ninja blade wear limits

Blade Sharpening

1.Disconnect the spark plug wire and secure the end away from the plug.

2.Tilt the mower up on its rear wheels. Do not tilt the mower with the spark plug or carburetor down.

Important: Drain the fuel tank before tipping the mower. DO NOT tip the machine with the carburetor or spark plug down. Oil from the crankcase will saturate the air filter and cause the engine to be hard to start or not start at all. If contamination does occur, the air filter will have to be replaced.

3. Remove the blade (B, Figure 20).

Make sure that blade hub is seated between flanges

A

C

B

D

E

Figure 20: Removing the mower blade

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Contents Models 21” STEEL DECK WALK MOWERS SERIESSafety Instructions & Operators Manual for RP217020BDV 7800424 RP2187520BV RP2187520BVE 7800427 2167520BEngine PRODUCT REGISTRATIONDate of Purchase Retailer Retailers Phone Number Equipment Snapper at P.O. Box 1379, McDonough, GeorgiaFeatures and Controls Operation Table of ContentsOperator Safety MaintenanceSlope Operation Important Operator Safety InstructionsProtection for Children PreparationSafe Handling of Gasoline Continued From Previous Page Important Operator Safety Instructions ContinuedMaintenance and Storage OperationFeatures and Controls Features and ControlsStarting and Operation OperationPre-Start Check List Engine and Blade Briggs Quantum and Intek Series EnginesStopping Handle Height AdjustmentOperation Continued Propelling the Mower Self-Propelled Models OnlyRemoving the Recycling Cover Cutting Height AdjustmentRecycling Operation Figure 7 Adjusting cutting heightFigure 10 Installing the discharge deflector Installing the Discharge DeflectorInstalling the Grass Bag Adapter Figure 11 Installing the grass bag adapterIMPORTANT Install the grass bag as a safeguard Installing the Recycling PlugInstalling the Grass Bag Figure 12 Installing the recycling plugService - After First 5 Hours MaintenanceMaintenance - Introduction Check Grease Level in TransmissionStorage Procedure Maintenance ContinuedService - Periodic Check Mower BladeNinja Blade Wear Limit Mower Blade ReplacementStandard Blade Wear Limit Blade SharpeningFigure 22 Wheel drive control adjustment Blade Sharpening ContinuedWheel Drive Control Adjustment Self-Propelled Models Only Figure 21 Sharpening the mower bladeDrive Spring Repair/Replacement Driven and Drive Disc ServiceCleaning Drive Disc & Driven Disc Driven Disc AdjustmentFigure 26 Adjusting the driven disc Driven Disc Adjustment ContinuedDriven Disc Replacement Figure 27 Proper driven disc adjustmentFigure 29 Removing the driven disc assembly Driven Disc Replacement ContinuedDriven Disc Bearing Replacement Figure 30 Replacing the driven discReplacing the Bearing On the Pulley End Of the Hex Shaft Belt ServiceEngine Drive Belt Replacement Stretch Type Belts Figure 32 Engine drive belt routingA B C D E F G Engine Drive Belt Replacement Stretch Type Belts - ContinuedTransmission Poly-V Belt Replacement Figure 33 Removing the drive discBattery Service Battery ServiceNew Battery Preparation Battery StorageService Schedule Maintenance/Replacement PartsCORRECTIVE ACTION TroubleshootingPROBABLE CAUSE Warranties 2 YEAR LIMITED WARRANTYDISCLAIMER OF WARRANTY Page Page Page Part Number Product SpecificationsCommon Service Parts Snapper Products