Exmark 4500-620 manual Lubricate Caster Wheel Hubs, Service Interval Yearly

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Maintenance

Lubricate Caster Wheel Hubs

Service Interval: Yearly

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

 

Figure 13

1. Seal guard

2. Spacer nut with wrench

 

flats

2.Remove the caster wheel from the sulky frame.

3.Remove seal guards from the wheel hub.

4.Remove one of the spacer nuts from the axle assembly in the caster wheel. Note that thread locking adhesive has been applied to lock the spacer nuts to the axle. Remove the axle (with the other spacer nut still assembled to it) from the wheel assembly.

5.Pry out seals, and inspect bearings for wear or damage and replace if necessary.

6.Pack the bearings with a NGLI grade #1 multi-purpose grease.

7.Insert one bearing, one new seal into the wheel.

Note: Seals (Exmark PN 103-0063) must be replaced.

8.If the axle assembly has had both spacer nuts removed (or broken loose), apply a thread locking adhesive to one spacer nut and thread onto the axle with the wrench flats facing outward. Do Not thread spacer nut all of the way onto the end of the axle. Leave approximately 1/8 inch (3 mm) from the outer surface of the spacer nut to the end of the axle inside the nut.

9.Insert the assembled nut and axle into the wheel on the side of the wheel with the new seal and bearing.

10.With the open end of the wheel facing up, fill the area inside the wheel around the axle full of NGLI grade #1 multi-purpose grease.

11.Insert the second bearing and new seal into the wheel.

12.Apply a thread locking adhesive to the second spacer nut and thread onto the axle with the wrench flats facing outward.

13.Torque the nut to 75-80 in-lb (8-9 N-m), loosen, then re-torque to 20-25 in-lb (2-3 N-m). Make sure axle does not extend beyond either nut.

14.Reinstall the seal guards over the wheel hub and insert wheel into the sulky frame. Reinstall caster bolt and tighten nut fully.

Important: To prevent seal and bearing damage, check the bearing adjustment often. Spin the caster tire. The tire should not spin freely (more than 1 or 2 revolutions) or have any side play. If the wheel spins freely, adjust torque on spacer nut until there is a slight amount of drag. Reapply thread locking adhesive.

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Contents Standon All Rights Reserved Introduction Contents Training SafetySafety Alert Symbol Safe Operating PracticesMaintenance and Storage OperationSlope Operation Safety and Instructional Decals Tire SpecificationsDimensions Model NumbersAssembly Diagram SetupMounting the Pull Frame Installing the StandOn Rider to MowerFor Turf Tracer HP and Metro HP Units Mounting the Pull Arm and PlatformPull arm assembly Pull frame Quick connect pins Transporting OperationPre-Start Operating InstructionsLubricate Grease Fittings MaintenanceInspect StandOn Check StandOn for BuildupLubricate Caster Wheel Hubs Service Interval YearlyAdapter Plate and Tire Adjustment AdjustmentsExmark Commercial Attachments and Accessories Date Description of Work Done Service Done By Service RecordThis page may be copied for personal use See EXMARK’S Complete Line of Accessories and Options

4500-620 specifications

The Exmark 4500-620 is a standout in the realm of commercial-grade zero-turn mowers, designed to cater to professionals who demand efficiency, performance, and durability. This powerful mower is known for its robust features and cutting-edge technologies, making it a preferred choice among landscapers and grounds maintenance teams.

At the heart of the Exmark 4500-620 is its powerful engine, typically featuring a Kohler or Kawasaki powerplant that provides reliable performance and impressive torque. This performance is critical when tackling large open areas as well as more intricate landscaping jobs. The 4500-620 often boasts a high horsepower rating, allowing operators to cut through thick grass and tackle rugged terrain with ease.

One of the defining characteristics of this model is its exceptional cutting deck. With various size options available, including 60-inch and 72-inch decks, the Exmark 4500-620 enables operators to achieve a professional-quality cut, delivering uniform results while significantly reducing mowing time. The deck is engineered with a deep design that enhances airflow, ensuring that grass clippings are effectively discharged for a clean finish. Additionally, the innovative Turf Trac technology allows for precise maneuverability, enabling users to get around obstacles without compromising cutting quality.

Ease of operation is another critical feature of the Exmark 4500-620. The ergonomic controls ensure that operators can adjust speeds and directions smoothly while maintaining comfort during extended mowing sessions. The seat is typically designed for maximum comfort, often featuring adjustable armrests and lumbar support, allowing for cushioned rides even on uneven terrain.

Moreover, the Exmark 4500-620 integrates several advanced technologies, including LED lighting for improved visibility during early morning or late evening mowing. The mower's fuel efficiency is also noteworthy, with systems in place to reduce operational costs without sacrificing performance.

Durability is a hallmark of Exmark products, and the 4500-620 is no different. Built with high-quality materials, the chassis and components are designed to withstand the rigors of daily commercial use. Maintenance is made easier with accessible service points, allowing for quick checks and routine upkeep.

In summary, the Exmark 4500-620 is a top-tier zero-turn mower that combines power, efficiency, and advanced technology to meet the demands of professional landscapers. With its robust engine, exceptional cutting capabilities, and operator-friendly design, it remains a leading choice in the competitive market of commercial mowers. This model's reputation for reliability and performance solidifies its status as an invaluable tool for getting the job done right.
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