Exmark 4500-528 manual Adjust Neutral Control Linkages, Adjust Hydro Control Linkages

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Maintenance

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 (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 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 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 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 disengaged whenever speed control levers are moved out of the neutral position.

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Contents Turf Tracer California Introduction Contents Safety Safety Alert SymbolSafe Operating Practices TrainingSafety Operation Slope OperationMaintenance and Storage Safety Safety and Instructional Decals 103-2242 103-2243 103-4935 103-2432 116-0404 117-2718 Systems SpecificationsModel Numbers Dimensions Product Overview Torque RequirementsOperation ControlsPre-Start Operating Instructions Driving the Machine Drive Lever/Neutral Lock Latch OperationDriving Forward Driving in ReverseAdjusting the Cutting Height Adjusting the Anti-Scalp RollersTransporting Transporting a UnitOperation Maintenance Recommended Maintenance SchedulesCheck Battery Charge Recommended Jump Starting ProcedureDo Not jump start a weak battery if these conditions exist Check Engine Oil LevelCheck Mower Blades Check Safety Interlock System Service Air Cleaner Check for Loose HardwareChange Engine Oil Check Hydraulic Oil LevelLubricate Caster Wheel Hubs Check Condition Of BeltsLubricate Grease Fittings Change Fuel Filter Remove Engine Shrouds and Clean Cooling FinsCheck Spark Plugs Level Change Hydraulic System FilterHydraulic System Air Purge Fuel Tank Mounting Hardware Specifications Thread Locking AdhesivesPark Brake Adjustment Hydro Drive Linkage AdjustmentMobil HTS Grease Or Food-Grade Anti-seize Deck LevelingAdjust Neutral Control Linkages Adjust Hydro Control LinkagesTracking Adjustment Drive Lever Linkage AdjustmentHydro Pump Spring Tension Setting Electric Clutch AdjustmentClean Grass Build-Up Under Deck Waste DisposalTroubleshooting Problem Possible Cause Corrective ActionTroubleshooting Schematics Electrical DiagramElectrical Logic Schematic Hydraulic Diagram Exmark Commercial Turf Equipment 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

4500-528 specifications

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