Snapper 421823BVE, 422023BVE Engine Adjustments & Repair, Mower Drive Belt Adjustment, To 3-1/4

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Section 4 - ADJUSTMENTS & REPAIR

WARNING

DO NOT attempt any adjustments, maintenance, service or repairs with the engine running. STOP engine. STOP blade. Engage parking brake. Remove key. Remove spark plug wire from spark plug and secure away from plug. Engine and components are HOT. Avoid serious burns, allow all parts to cool before working on machine. Fuel Filler Cap and vent must be closed securely to prevent fuel spillage. Once blade is disengaged it should come to a stop in 3 seconds or less. If the blade continues to rotate after 3 seconds the blade brake must be adjusted. DO NOT continue to operate the machine if the blade brake is not operating properly.

4.1ENGINE ADJUSTMENTS & REPAIR

Refer to the engine owner’s manual for those adjustments and/or repairs that can be made by the owner.

4.2MOWER DECK & COMPONENT ADJUSTMENTS The following mower deck and component adjustments and repairs can be made by the owner. However, if there is difficulty in achieving these adjustments and repairs, it is recommended that these repairs be made by an authorized SNAPPER dealer.

4.2.1. MOWER DRIVE BELT ADJUSTMENT

On 42” models, the mower drive belt DOES NOT require adjustment. If the belt does not drive blade properly, replace belt. See Figure 4.1 for belt routing.

TOP VIEW OF BELT ROUTING

LEFT

 

 

 

RIGHT

SPINDLE

 

 

 

 

 

 

SPINDLE

PULLEY

 

 

 

 

 

 

PULLEY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2-1/8”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IDLER

 

 

 

 

 

 

 

 

 

PULLEY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIXED

 

 

 

 

 

 

 

 

 

 

 

 

PULLEY

 

 

 

 

 

 

 

 

 

 

 

ENGINE DRIVE

PULLEY

ASSEMBLY

FIGURE 4.1

WARNING

DO NOT operate machine until blade brake is adjusted and functioning properly. If blade stop time cannot be achieved with the adjustment procedure described above, take the machine immediately to an authorized SNAPPER dealer.

4.2.2. BLADE BRAKE ADJUSTMENT

The automatic Blade Brake should stop the blades within 3 seconds anytime the blades are disengaged by moving blade lever to the "OFF" position or by releasing the Blade Pedals. Check this by disengaging the Blade Lever as shown in Figure 4.2. Perform the following measurement and adjustment.

1.With the blade engagement lever disengaged, measure the distance between the front of the blade lever and the edge of the latch plate. The dimension should be 3” to 3-1/4" clearance between lever and edge of plate. See Figure 4.2. If the dimension is incorrect go to step 2.

3” to 3-1/4”

CLEARANCE

BLADE

LEVER

DISENGAGED

MEASURE FROM

THIS EDGE

FIGURE 4.2

(Continued on Next Page)

IMPORTANT: On 42” deck models do not require belt tension adjustment. But, if front frame assembly clamp is loosened for any reason, recheck belt spacing between idler pulley and fixed pulley. Place deck height lever in the 3rd position. With blade lever in the “ON” position, the distance between the idler pulley and the fixed pulley should be 2-1/8”. See Figure 4.1.

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Contents Rear Engine Riding Mower Series From Previous Column Important Safety InstructionsSafe Handling of Gasoline Towing Table of Contents Nomenclature IntroductionPRE-START Check List OPERATOR’S Seat Adjustment Front to Rear AdjustmentOn Next Starting & Operation Engine Electric StartEngine Manual Start Starting & OperationWheel Drive Starting & Operation 2.3.3. Mower BladeMower Blade Stopping ENGINE, Wheel DRIVE, Blade 2.4.1. EngineCutting Height Adjustment Stopping ENGINE, Wheel DRIVE, Blade 2.4.4. Park BrakeDo not park the machine on slopes Reverse Lockout Mechanism Override Reverse Lockout MechanismService Engine AIR Cleaner Check Mower Blade Service After First 5 Hours Change Engine OILService Brake / Park Brake Service After First 5 Hours 3.2.4. Check Blade Drive BeltTOP View of Belt Routing Blade BrakeEngine Must not Start if Service Every 25 Operating HoursEngine should Start if Engine and Blades Must Stop ifClean Mower Deck Battery Fluid LevelDo not Overfill Mower Deck LevelnessRear Axle Bearing Lubrication Mower Blade Spindle Lubrication From PreviousEngine Service AnnuallyFuel Filter Every TWO YearsRemoving Fuel Tank Storage OUT of SeasonMower Drive Belt Adjustment Engine Adjustments & RepairBlade Brake Adjustment To 3-1/4Mower Deck & Component Adjustments Blade Brake Adjustment Mower Deck AdjustmentSide To Side Levelness Front to Rear Levelness Service BRAKE/PARK Brake Adjustment Mower Blade Replacement 4.4.1. Blade Wear Limits Adjustment From PreviousBlade Drive Belt Replacement Blade SharpeningBelt Removal Belt Replacement Battery Installation Battery Battery RemovalBattery Storage Battery ServiceNEW Battery Preparation 1. Remove battery from carton Battery TestingSnapper Rear Engine Rider Accessories Problem Probable Cause StopCorrective Action Blades Not Cutting Loss Of TractionCutting Grass ImproperlyTo be Performed Pages Subject Service ReferenceDisclaimer of Warranty Year Limited WarrantyPrimary Maintenance Primary Maintenance Primary Maintenance Primary Maintenance Snapper Product Registration Form Rear Engine Riding Mower Series