Check the Mower Blade

Maintenance

Service Interval: Before each use or daily

Always mow with a sharp blade. A sharp blade cuts cleanly and without tearing or shredding the grass blade.

1.Stop the engine and wait for all moving parts to stop.

2.Disconnect the wire from the spark plug (Figure 10 and Figure 11).

3.Drain the gasoline from the fuel tank. Refer to

Emptying the Fuel Tank and Cleaning the Fuel Filter section.

4.Tip the lawn mower onto its right side.

5.Inspect the blade for sharpness and wear, especially where the flat and the curved parts meet (see Figure 21). Because sand and abrasive material can wear away the metal that connects the flat and curved parts of the blade, check the blade before using the lawn mower. If you notice a slot or wear (Figure 21B and Figure 21C), replace the blade.

		Figure 21
1.	Sail	3.	Wear
2.	Flat	4.	Slot

Note: For the best performance, install a new blade before the cutting season begins. During the year, file down any small nicks to maintain the cutting edge.

DANGER

A worn or damaged blade can break. A piece of the blade could be thrown into the operator’s or bystander’s area, resulting in serious personal injury or death.

•Inspect the blade periodically for wear or damage.

•Replace a worn or damaged blade.

If it is necessary to remove the blade for replacement or sharpening, complete the following steps:

A.To remove the blade, use a block of wood to hold the blade steady (see Figure 22). Make sure to grasp the end of the blade using a rag or a thickly padded glove.

•For Blade Brake Clutch Units: Remove the blade nuts, blade support, and blade.

•For Units without a Blade Brake Clutch: Remove the blade bolt, blade support, and blade.

Figure 22

B.For Sharpening: File the top side of the blade to maintain its original cutting angle (Figure 23A and B) and inner cutting edge radius (Figure 23A). The blade will remain balanced if you remove the same amount of material from both cutting edges.

4500-686 Rev. B specifications

The Exmark 4500-686 Rev. B is a cutting-edge commercial mower that embodies the perfect blend of performance, durability, and user-friendly features. Designed for professional landscapers and grounds maintenance professionals, this mower is built to handle the rigorous demands of large properties and commercial applications.

One of the standout features of the Exmark 4500-686 Rev. B is its powerful engine. Equipped with a robust EFI (Electronic Fuel Injection) engine, it delivers exceptional power and fuel efficiency. The engine's advanced technology allows for quicker starts and better throttle response, ensuring that users can tackle their mowing tasks without any delays. This efficiency translates into reduced operating costs and less time spent refueling.

Another notable technology integrated into this mower is the UltraCut deck system. The 4500-686 Rev. B features a precision-engineered cutting deck that provides a superior cutting performance, offering an even and professional finish to any lawn. The design promotes optimal airflow beneath the deck, resulting in better grass lift and dispersion, which reduces clumping and enhances the quality of the cut. Additionally, the cutting height is easily adjustable, allowing operators to customize their mowing according to specific turf conditions.

User comfort is a paramount consideration in the design of the Exmark 4500-686 Rev. B. The mower is equipped with an ergonomic seat and controls that minimize operator fatigue during extended use. The full-suspension seat absorbs shocks and vibrations, while the easy-to-use controls allow for intuitive operation, ensuring that mowing is a seamless and productive experience.

Durability is another key characteristic of the 4500-686 Rev. B. Built with high-quality materials and components, this mower is designed to withstand the wear and tear of everyday use. The frame is reinforced to provide added strength, while the corrosion-resistant coating ensures that it maintains its appearance and functionality over time.

In conclusion, the Exmark 4500-686 Rev. B is an exceptional choice for anyone looking for a reliable and efficient commercial mower. With its powerful EFI engine, advanced cutting technologies, emphasis on operator comfort, and rugged build quality, this mower offers unmatched performance in the field. Whether for professional landscaping or maintaining large properties, the Exmark 4500-686 Rev. B is engineered to meet the demands of any mowing job.