Exmark 4500-450 Removing the Blades, Checking for Loose Blades or Damaged Spring Disc Washers

Page 39

Maintenance

Figure 33

48 and 52 Inch Deck

1. Blades front to rear

2. Measure here

 

 

Figure 34

42 Inch Deck

1. Blades front to rear

2. Measure here

2.Rotate the opposite ends of the blades forward.

3.Measure from a level surface to the cutting edge of the blades at the same position as in step 1. The difference between the dimensions obtained in steps 1 and 3 must not exceed 1/8 inch (3 mm). If this dimension exceeds 1/8 inch (3 mm), the blade is bent and must be replaced. Refer to Removing the Blades and Installing the Blades.

WARNING

A blade that is bent or damaged could break apart and could seriously injure or kill you or bystanders.

•Always replace bent or damaged blade with a new blade.

•Never file or create sharp notches in the edges or surfaces of blade.

Checking for Loose Blades or Damaged Spring Disc Washers

1.Place a wrench on the blade bolt and torque to 32-42 ft lb (43-57 N-m).

2.With the wrench still on the blade bolt, hold the blade spindle stationary and using a rag or thickly padded glove, try to rotate the blade. If the blade rotates relative to the spindle guard without further tightening the blade bolt, the spring disc washer has been flattened or damaged and the bolt and washer assembly must be replaced (Figure 35). Refer to Removing the Blades and Installing the Blades.

3.Once the blade has been removed, inspect the spring disc washer. If the washer appears to be damaged (the washer surface has been marred) or flattened, the bolt and washer assembly must be replaced.

Removing the Blades

The blades must be replaced if a solid object is hit, if the blade is out of balance, or the blade is bent. To ensure optimum performance and continued safety conformance of the machine, use genuine Exmark replacement blades. Replacement blades made by other manufacturers may result in an unsafe machine.

Hold the blade end using a rag or thickly-padded glove (or place a wrench on the top sheave nut). Remove the blade bolt and washer assembly, washer, and blade from the spindle shaft (Figure 35).

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Contents Quest California Introduction Contents General Operation SafetySafety Alert Symbol Safe Operating PracticesTowing ServiceSlope Operation ChildrenGeneral Service Exmark Riding Mower Safety93-7009 Safety and Instructional Decals109-6035 116-0532 PTO Symbols 109-8965 Specifications Model NumbersSystems Dimensions Torque Requirements Product OverviewControls OperationHeight-of-Cut Foot Lever Think Safety FirstOperating Instructions Parking Brake LeverRecommended Gasoline Gasoline/Alcohol blends Using Stabilizer/ConditionerChecking the Engine Oil Level Starting the EngineDisengaging the Blades Operating the BladesStopping the Engine Engaging the BladesDriving Forward or Backward Safety Interlock SystemUnderstanding the Safety Interlock System Testing the Safety Interlock SystemBackward Adjusting the Height of CutStopping the Machine ForwardAdjusting the Anti-Scalp Rollers Ground. Do Not adjust rollers to support the deckPositioning the Seat Adjusting the Motion Control Levers Changing the Seat Ride SuspensionPushing the Machine by Hand Transporting a Unit Side DischargeTransporting To Operate the MachineOperating Tips Cutting Speed When StoppingKeep the Underside of the Mower Clean Blade MaintenanceRecommended Maintenance Schedules MaintenanceGreasing the Bearings Accessing the BatteryRaising the Seat LubricationEngine Maintenance Servicing the Air CleanerServicing Paper Element Remove the foam sleeve from the element Servicing the Engine OilChecking the Oil Level Changing the Oil and FilterChecking the Hydraulic Oil Level Servicing the Spark Plug Change the Hydraulic System FilterChecking the Spark Plug Cleaning the Blower HousingInstalling the Spark Plug Removing the Spark PlugFuel filter is in the fuel line between the tank and engine Fuel System MaintenanceElectrical System Maintenance Replacing the Fuel FilterCharging the Battery Removing the BatteryCharging the Battery Servicing the Fuses and Relay Installing the BatteryInspecting the Blades Drive System Maintenance Checking the Tire PressureMower Maintenance Servicing the Cutting Blades Before Inspecting or Servicing the BladesChecking for Loose Blades or Damaged Spring Disc Washers Removing the BladesInspecting the Belts Mower Belt MaintenanceInstalling the Blades Sharpening the BladesOff the clutch pulley as shown in and Figure Leveling the Mower DeckFront-to-Rear Blade Slope Adjusting the Blade SlopeDeck lift arm Deck hanger Float retaining nut Locate items shown in Figure Replacing the Discharge DeflectorWashing the Underside of the Mower Tracking AdjustmentMaintenance Storage Cleaning and StorageProblem Possible Cause Corrective Action TroubleshootingTo Pushing the Machine by Hand Diagram SchematicsElectrical Logic Schematic Exmark Quest Turf Equipment Service Record Page Page See EXMARK’S Complete Line of Accessories and Options

4500-450 specifications

The Exmark 4500-450 is a top-tier commercial-grade zero-turn mower that has gained immense popularity among landscaping professionals for its advanced features, superior performance, and durability. Designed to tackle the toughest mowing tasks, the 4500-450 stands out for its reliability and innovative technologies.

One of the defining characteristics of the Exmark 4500-450 is its powerful engine. Equipped with a robust Kohler or Kawasaki engine, this model delivers impressive horsepower, ensuring that it can handle even the most demanding terrains with ease. This power allows for efficient cutting, enabling users to complete jobs more quickly without sacrificing quality.

The Exmark 4500-450 features a commercial-grade cutting deck that is fully adjustable to provide a clean and professional-looking cut. Its cutting width can range from 48 to 60 inches, making it versatile enough to handle various lawn sizes and types. The deck is designed with a unique airflow management system that optimizes grass lift, ensuring even and consistent results.

One of the standout technologies in the Exmark 4500-450 is its patented UltraCut deck design. This innovative feature promotes superior cutting performance while reducing clumping and providing a finer mulching capability. Additionally, the deck is designed for easy cleaning, which helps maintain the mower’s performance over time.

Comfort and usability are top priorities for the Exmark 4500-450. It boasts an ergonomic seat with high back support, reducing operator fatigue during long mowing sessions. The intuitive control system allows for smooth maneuverability, even in tight spaces, making it ideal for commercial landscaping work.

Moreover, the Exmark 4500-450 is built with durability in mind. Constructed from high-quality materials, it is designed to withstand the rigors of daily use. Its heavy-duty frame and components contribute to its long lifespan, ensuring that it remains a reliable workhorse for years to come.

In conclusion, the Exmark 4500-450 is an exceptional choice for professionals seeking a powerful, efficient, and durable zero-turn mower. With its high-performance engine, innovative cutting technologies, and user-friendly features, it sets a standard in commercial landscaping equipment, delivering results that exceed expectations while making the mowing process as efficient and comfortable as possible.
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