Test Using the Grass Bag

Operation

DANGER

If the blade brake clutch system is inoperative, the blade will continue to rotate when you release the blade control bail. Contact with the blade could occur, causing serious injury.

•Check the BBC operation before each use.

•Never use the BBC-equipped lawn mower with an inoperative safety system.

•Take your lawn mower to an Authorized Service Dealer for repair if the safety system fails to operate properly.

1.Install the empty grass bag on the discharge tunnel.

2.Start the engine.

3.For units with a Blade Brake Clutch: Push the blade control lock lever forward to release the blade control bail (Figure 4).

4.Squeeze the blade control bail against the handle.

5.The bag should begin to inflate, indicating that the blade is engaged and rotating.

6.Release the blade control bail. If the bag does not immediately deflate, it indicates that the blade is still rotating. The blade brake clutch mechanism may be deteriorating, and, if ignored could result in an unsafe operating condition. Have the lawn mower inspected and serviced by an Authorized Service Dealer.

Adjusting the Cutting Height

The rear wheels are adjusted together with a height adjustment rod located on the mower housing by the left rear wheel. The front wheels are adjusted separately by removing the front wheel shaft assemblies, adjusting the height, and then replacing the shaft assemblies. The cutting height can be adjusted from 1 inch (25 mm) to 4 1/2 inches (114 mm) in 1/2 inch (12.7 mm) increments.

WARNING

Adjusting the cutting height levers could bring your hands into contact with a moving blade. A moving blade can cause serious injury.

•Stop the engine and wait for all movement to stop before adjusting the cutting height.

•Do Not put your fingers under the housing when adjusting the cutting height.

•Rear Wheel Adjustment:

1.Pull the wheel height adjustment rod upward to release the pin from the notch in the adjustment bracket (Figure 16).

Figure 16

1.	Pull upward	4.	Pin
2.	Wheel height adjustment	5.	Rotate to desired setting
	rod
3.	Adjustment bracket	6.	Indicator

2.Apply downward pressure or lift the housing to rotate the height adjustment bracket. Use the indicator to determine the desired setting.

3.Release the wheel height adjustment rod to set the pin securely in the desired notch.

•Front Wheel Adjustment

1.Pull up on the height adjuster and pull the front wheel shaft assembly outward as shown in Figure 17.

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.