Exmark 4500-540 Rev. B manual Adjust Neutral Control Linkages, Adjust Hydro Control Linkages

Page 34

Maintenance

speed control linkage (see Figure 16) until the tabs are positioned correctly.

Figure 16

Viewed from Left Side of Unit

1. Neutral Safety Switch

3. 5/16 inch (7.9 mm)

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 (7.9 mm) between the tab and the switch (see Figure 16). 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 4. 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 17

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 17.

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 Safe Operating Practices SafetySafety Alert Symbol TrainingSafety Operation Slope OperationMaintenance and Storage Safety Safety and Instructional Decals 413327 103-1977 109-3148 116-0404 117-2718 Model Numbers SpecificationsSystems Dimensions Product Overview Torque RequirementsOperation ControlsTracking Adjustment Knob Off-Run Switch Manual Start OnlyIgnition Switch Electric Start Only Park Brake LeverOpen the Fuel Shut-Off Valve Pre-StartOperating Instructions Starting the Engine Manual StartDriving the Machine Disengaging the PTOStopping the Engine Drive Lever/Neutral Lock Latch OperationDriving Forward Adjusting the Cutting HeightDriving in Reverse Adjusting the Anti-Scalp Rollers Transporting Transporting a UnitMaintenance Recommended Maintenance SchedulesCheck Engine Oil Level Check Battery Charge Electric Start Units OnlyProposition 65 Warning Service Interval As required Do Not jump start a weak battery if these conditions existCheck Mower Blades Install bushing/blade assembly into spindleReplacing the Discharge Deflector Service Air Cleaner Check Safety Interlock SystemCheck for Loose Hardware Check Tire Pressures Change Engine OilCheck Hydraulic Oil Level Check Condition Of BeltsChange Hydraulic System Filter Check Spark PlugsChange Fuel Filter Level Hydraulic System Air Purge Inspect PTO Clutching Belt Tension Wheel Hub-Slotted Nut Torque SpecificationThread Locking Adhesives Mobil HTS Grease Or Food-Grade Anti-seize Park Brake AdjustmentHydro Drive Linkage Adjustment Deck LevelingAdjust Neutral Control Linkages Adjust Hydro Control LinkagesDrive Lever Linkage Adjustment PTO Safety Switch Tracking AdjustmentHydro Pump Spring Tension Setting Retighten PTO switch mounting hardwareClean Debris From Machine Clean Engine and Exhaust System AreaRemove Engine Shrouds and Clean Cooling Fins Clean Grass Build-Up Under DeckMaintenance Troubleshooting Problem Possible Cause Corrective ActionTroubleshooting Schematics Electrical DiagramHydraulic Diagram Exmark Commercial Turf Equipment Page Service Record Date Description of Work Done Service Done ByPage This page may be copied for personal use See EXMARK’S Complete Line of Accessories and Options