Height of CUT Adjustment

Figure 16

To set the height of cut, lift the Socket/Vinyl

Cap of the Dial-A-HeightTM(1, Figure 17) up then turn clockwise (viewed from above) to lower the roller (4, Figure 17) (raise the height of cut), or counter-clockwise to raise the roller (lower the height of cut).

NOTE: Each quarter turn (90°) of the Socket/Vinyl Cap will raise or lower the height of cut by approx. 1/32”. A full turn (360°) will raise or lower the height of cut by approx. 1/8”.

IMPORTANT: Rollers must be adjusted to the same height so that there will be uniform cutting the entire width of the mower.

The Height Adjustment Scale Decal (2, Figure 17) will provide approximate height of cut corresponding to the Socket/Vinyl Cap rotation.

1.Sight along the bottom edge of the Adjuster Tube (3, Figure 17) to achieve the desired cut height.

2.When making large adjustments to the height of cut (over 1/2”), it is easier to make small incremental adjustments to each side until the desired change is achieved, making sure the Socket/Vinyl Cap is locked in position.

3.If very accurate cutting heights are required, place a board or other gage plate (of desired thickness) on a smooth flat surface under each bedknife back bar (1, Figure 22) and adjust the roller height accordingly.

Figure 17

REEL TO BEDKNIFE

ADJUSTMENT

DANGER: Use heavy gloves and be careful. Bedknife and reel blades are very sharp.

The reel is adjusted to a fixed position bedknife. This makes a more rugged and durable frame and retains proper adjustment longer. The reel adjuster bolt (5, Figure 17) regulates the reel distance from the bedknife.

1.To reduce the distance, turn the locking hex nut on each side of the reel down with special reel adjustment wrench (6, Figure 17) and then tighten top nut.

2.Proceed slowly and do not over adjust— about 1/6 (one flat) of a turn on each side to begin with. Do not get the reel so tight that it is hard to turn by hand. A too tight reel will wear much faster. The reel should “wipe” or lightly touch the bedknife.

3.Check to see that blades are cutting the paper all the way across, using paper strips held between reel and bedknife.

4.Make sure adjustment nuts are tight before mowing.

REEL END PLAY ADJUSTMENT

As the reel is used, normal wear of the reel bearings will cause end play. This condition could cause uneven wear to moving parts and uneven cutting of turf.

GB - 18

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.