Exmark 4500-358 manual Viewed from Left Side of Unit

Page 33

Maintenance

Adjust the threaded yoke at the bottom of the speed control linkage (see Figure 15) until the tabs are positioned correctly.

Figure 15

Viewed from Left Side of Unit

1. Neutral Safety Switch

3. 5/16 inch (.76 cm)

2.Actuating Tab in neutral position

3.Pull the speed control lever back to neutral. Check that the neutral safety switch actuating tab has depressed the plunger of the switch so that there is about 5/16 inch (.79 cm) between the tab and the switch (see Figure 15). If necessary, move the switch fore and aft.

Adjust Neutral Control Linkages:

1.Raise the rear of the machine up onto jack stands high enough to raise the drive wheels off of the ground.

2.Start the engine and move the throttle ahead to the full throttle position. Place the neutral lock latches in the “forward” position as shown in Figure 5. Release the park brake and move the speed control lever to the “mid-speed” position.

Note: The OPC levers must be held down and the park brake must be disengaged whenever the speed control lever is moved out of neutral or the engine will kill.

3.Squeeze the respective drive lever until an increased resistance is felt, this is where neutral should be.

If the wheel turns while holding the drive lever in neutral, the neutral control linkages need to be adjusted. If the wheel stops then go to step 7.

Figure 16

Viewed from Left Side of Unit

1.

Neutral Control Linkage

5.

Speed Control Linkage

2.

Hydro Control Linkage

6.

Adjust here-rotate at

 

 

 

approximately 1/4

 

 

 

turn increments and

 

 

 

re-check.

3.

Drive Lever Linkage

7.

Loosen nut

4.

Speed Control Crank

8.

Yoke

4.Loosen the nut against the neutral control linkage yoke as shown in Figure 16.

5.Adjust the neutral control linkage until the respective drive wheel stops when the lever is pulled against the neutral spring (neutral position). Turn the adjusting bolt approximately 1/4 turn clockwise if the wheel is turning in reverse or turn the bolt approximately 1/4 turn counterclockwise if the wheel is turning forward. Release the drive lever to the forward drive position and squeeze back into the neutral position. Check to see if the wheel stops. If not, repeat the above adjustment procedure.

6.Make this adjustment on both sides.

7.After adjustments are made and the wheels stop when the drive levers are in the neutral position, tighten the nuts against the yokes.

Adjust Hydro Control Linkages:

1.Place the speed control lever in the “neutral” position. This adjustment is again made with rear of machine on jack stands and engine running at full throttle. OPC levers will have to be held down and the park brake must be

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Contents Turf Tracer HP California Introduction Contents Safety Alert Symbol SafetySafe Operating Practices TrainingSafety Slope Operation OperationMaintenance and Storage Safety Safety and Instructional Decals 413327 103-1977 109-3148 116-0404 Specifications Model NumbersSystems Dimensions Torque Requirements Product OverviewControls OperationIgnition Switch Electric Start Only Off-Run Switch Manual Start OnlyTracking Adjustment Knob Park Brake LeverOperating Instructions Pre-StartOpen the Fuel Shut-Off Valve Starting the Engine Manual StartDisengaging the PTO Stopping the EngineDriving the Machine Driving Forward Adjusting the Cutting HeightAdjusting the Anti-Scalp Rollers Transporting a Unit TransportingRecommended Maintenance Schedules MaintenanceCheck Battery Charge Electric Start Units Only Check Engine Oil LevelCheck Mower Blades Replacing the Discharge Deflector Check Safety Interlock System Service Pre-Cleaner Element and Air CleanerCheck for Loose Hardware Check Hydraulic Oil Level Change Engine OilCheck Tire Pressures Check Condition Of BeltsCheck Spark Plugs Change Fuel FilterChange Hydraulic System Filter Hydraulic System Air Purge Wheel Hub-Slotted Nut Torque Specification Inspect PTO Clutching Belt TensionThread Locking Adhesives Hydro Drive Linkage Adjustment Park Brake AdjustmentMobil HTS Grease Or Food-Grade Anti-seize Copper-Based Anti-seizeViewed from Left Side of Unit Need to be adjusted Between the washers. Adjust spring length byLinkage as shown in . Turn the rear See FigurePTO Safety Switch Hydro Pump Spring Tension SettingClean Debris From Machine Clean Engine and Exhaust System AreaRemove Engine Shrouds and Clean Cooling Fins Clean Grass Build-Up Under DeckBattery Disposal Problem Possible Cause Corrective Action TroubleshootingTroubleshooting Electrical Diagram SchematicsHydraulic Diagram Exmark Commercial Turf Equipment Page Page Service Record Page Page See EXMARK’S Complete Line of Accessories and Options