National Mower 99500500-8400 manual Upper Countershaft Belt Adjustment, Parking Brake Adjustment

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3.Once the traction pedal has been adjusted, the safety switch (2, Figure 15) may have to be re-adjusted by moving the switch in the range of the slot provided in the switch bracket. Adjust the switch so that the engine cannot be started unless the pedal is in the neutral position.

Figure 15

UPPER COUNTERSHAFT BELT ADJUSTMENT

The upper countershaft belt is driven by the electric clutch located on the engine stub shaft.

Belt adjustment is taken up automatically by the torsion spring assisted idler arm; no adjustment is necessary. If belt slippage does occur, check the idler arm for free movement. If slippage still occurs, replace belt.

PARKING BRAKE ADJUSTMENT

The parking brake should be set so that it holds the tractor securely. The parking brake must be released before the traction pedal is engaged.

1.Adjust the brake by loosening set screw in the brake knob and turning knob clockwise to tighten, or counterclockwise to loosen, then retighten set screw.

2.After making any adjustments, check brake on flat ground so that the tractor will not move with brake engaged.

3.Test further by putting tractor on a hill, leave the engine on, and engage park brake. Then test with the engine off.

GROUND SPEED CONTROL

The speed control (see Speed Control on page 9) is meant to ease operator fatigue by holding the forward speed constant.

Adjusting the hex head bolt (7, Figure 1) up or down and locking it with the lock nut will limit the pedal travel. Swing the speed control away from the traction pedal to allow a full range of forward speeds.

WING MOWER BELT TENSION

Proper belt tension allows mowers to be driven without slippage but with belt loose enough to be deflected slightly at a point midway between pulleys. An overly tight belt will cause excessive belt wear. Never allow oil or grease to get on belt, which would cause slipping.

1.The wing mowers must slide freely on pull rods to allow the pull yoke springs to properly tension the belt. If slippage occurs, it could be due to a weakened spring, a stretched belt, or sticky pull rods.

2.Clean and oil pull rods frequently and check to see that H-frames are sliding freely on shafts.

LOWER COUNTERSHAFT CHAIN ADJUSTMENTT

Chain adjustment is taken up automatically by the torsion spring-assisted idler arm; no adjustment is necessary. Periodically check to see that the idler arm is free to pivot.

REAR MOWER LIFT

The rear mower lift height has been preset at the factory and normally will not need to be adjusted.

REAR MOWER DRIVE BELT TENSION

Rear mower belt adjustment is provided by a spring tensioned belt idler pulley (1, Figure 16). The idler pulley must be pressing down on the lower portion of the rear mower belt (2, Figure 16).

If further adjustment is necessary due to belt stretching, relocate the spacers (3, Figure 16) on the pull rod pivot from position 3 to position 4 (4, Figure 16), between the pull rod pivot and the rear mower pull plate.

If proper tension cannot be accomplished by the above procedure, replace the belt.

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Contents Triplex Reel Mower Introduction Table of ContentsSafety Required Operator Training Safety DecalsNotations Practices and Laws Safety Rules Page Page Operation Controls and FeaturesChoke Operating Suggestions Prior to Starting the UnitMowing Operation Starting the EngineDriving the Tractor Vertical Mowing Unit MowingHillside Operation Pushing or Towing InstructionsTractor AssemblyRear Mower SeatSteering Wheel Wing Mower Lift Wing MowersEngine Crankcase Hydraulic OILTraction Pedal Adjustments Service and AdjustmentsBattery Parking Brake Adjustment Upper Countershaft Belt AdjustmentLower Countershaft Chain Adjustmentt Ground Speed ControlReel END Play Adjustment Height of CUT AdjustmentReel to Bedknife Adjustment Vertical Mowing Unit Blade Changing Backlapping ProcedureLapping Compound Grinding ProcedureGeneral Maintenance MaintenanceAssembly and Disassembly Charging a BatteryBelts Jumper CablesEngine Fuel Filter EngineLubrication Bedknife ReplacementHydraulic OIL Filter Symbols Frequency Location Type No. General Instructions StorageTires Starting the Engine After StorageEngine will not Start TroubleshootingTractor will not Move Reel will not TurnEngine SpecificationsTwo-Year Limited Turf Products Warranty Exclusions Items Not Covered by This Warranty

99500500-8400 specifications

The National Mower 99500500-8400 is an advanced lawn care solution that epitomizes efficiency and innovation for users who demand high performance from their gardening equipment. Designed for residential and light commercial use, this mower combines state-of-the-art technology with robust features to ensure a seamless mowing experience.

One of the standout features of the National Mower 99500500-8400 is its powerful engine. Equipped with a high-output, fuel-efficient engine, this mower delivers consistent power that translates into excellent cutting performance. This ensures that the mower can tackle various grass types and densities, making it useful for both manicured lawns and rugged terrains.

The 99500500-8400 boasts a durable cutting deck made from high-quality materials that resist corrosion and wear. This deck is designed with precision engineering to enhance airflow for optimal grass clipping discharge, resulting in clean, even cuts regardless of lawn conditions. Furthermore, the adjustable cutting height feature allows users to customize the mower’s settings, enabling them to achieve the desired grass length for their specific needs.

In terms of technology, the National Mower incorporates advanced safety measures to enhance user experience. The intuitive safety features include a blade brake that stops the blades within seconds when the operator releases the handle, reducing the risk of accidents. Additionally, the ergonomic handle design ensures comfort during use, allowing for prolonged operation without strain.

Another impressive characteristic of the 99500500-8400 is its ease of maintenance. The mower is engineered for quick blade sharpening and simple access to engine components, making routine upkeep straightforward for users. This is complemented by a lightweight design that enhances maneuverability, allowing users to navigate through tight spots and around obstacles with ease.

Finally, the National Mower 99500500-8400 is designed with environmental sustainability in mind. The fuel-efficient engine minimizes emissions, making it an eco-friendly choice for consumers looking to maintain their lawns without compromising on their commitment to the environment.

In conclusion, the National Mower 99500500-8400 stands out as a reliable, high-performance lawn mower featuring robust power, safety, and user-friendly characteristics ideal for any homeowner or light commercial user. Its blend of innovative technology and practical design makes it a must-have for efficient lawn care.
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