Simplicity ZT4000 Series manual Rear Suspension Adjustment, To adjust the spring pre-load

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Regular Maintenance

Rear Suspension Adjustment

The shock assembly can be adjusted to allow the operator to customize the ride according to operator’s weight and/or operating conditions. You have the option of adjusting the spring pre-load.

Items to consider before adjusting the suspension.

•Less spring pre-load should be used with light weight operators, which will provide a softer, more cushioned ride.

•More spring pre-load should be used with heavy weight operators, or when a rear-mount grass bagger system is installed, which will provide a stiffer, more rigid ride.

To adjust the spring pre-load:

1.Park machine on a flat, level surface. Disengage the PTO, stop the engine and engage the parking brake.

2.Raise the rear of the machine and secure with jackstands. Chock the front wheels to prevent the machine from rolling.

3.Remove the rear drive tires.

4.See Figure 37. Using the supplied spanner wrench (p/n 5022853), insert the tip of the wrench into the notch in the pre-load adjuster. While holding the wrench in place with one hand, turn COUNTER-CLOCKWISE to increase the pre-load, turn CLOCKWISE to decrease the pre-load. Make sure both shocks are set to the same amount of pre-load.

5.Reinstall the rear drive tires. Torque the lug bolts to 85-95 ft/lbs. (115-129 Nm). Remove the jackstands from under the machine.

NOTE: Spanner wrench is located under the seat on the right-hand side of the machine.

NOTE: It is recommended that the rear suspension be adjusted stiffer due to the added weight of the collection system.

SPANNER

WRENCH

Figure 37. Rear Suspension Adjustments

WARNING

Spring loaded components can kick back causing injury.

Use two hands when adjusting the shock assemblies. This will prevent the wrench from slipping while pressure is being applied.

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Contents 24HP Zero-Turn Riders Mfg. No Description 5900707 26HP Zero-Turn RidersMfg. No Description 5900765 Date Purchased Table of Contents Operating Safety Read the ManualChildren Slope Operation Thrown ObjectsMoving Parts Roll Bar Use Retaining Walls, Drop-offs, and WaterOverhead Obstacles Fuel and Maintenance Enclosed AreasGeneral Operation Transporting and StorageTowed Equipment Ride-On Units EmissionsIgnition System Operating on steep slopes can be dangerousService and Maintenance Service & MaintenanceSafe Handling of Gasoline Roll Bar Instructions Operational WarningsInspection of the Roll Bar Protective Structure Inspection and Maintenance of the Roll Bar Seat Belt Safety Decals Objects HazardSafety Interlock System Operational Safety ChecksSafety Icons North American Safety IconsIdentification Numbers CE ModelsCE Identification Tag Markings North American ModelsPTO Power Take Off Switch Parking BrakeChoke Ignition Switch Hour Meter / Maintenance ReminderSeat Adjustment Lever Throttle ControlGeneral Operating Safety Checks Before StartingSeat Adjustment Check Tire PressuresPushing the Rider by Hand OperationMowing Height Adjustment Foot Pedal AdjustmentTo Adjust Pedal Position Starting the Engine Stopping the RiderZero-Turn Driving Practice Smooth TravelForward Travel Practice Practice Turning Around a Corner Executing an End-Of-Row Zero TurnPractice Turning In Place Storage MowingMowing Recommendations Fire or explosion can cause severe burns or deathMowing Methods Attaching a Trailer Proper MulchingMulching Requires Excellent Mowing Conditions How Much Grass to MulchMaintenance Schedule Check Rider / Mower for loose hardwareChecking / Adding Fuel Fuel FilterChange Oil & Filter Inspect Muffler and Spark ArresterBattery Maintenance Check Hydraulic Oil LevelChange Hydraulic Oil Filter Lubrication GreaseOil Lubricating the Front CastersServicing The Mower Blades Inspecting the Mower BladesReinstalling the Mower Blades Balancing the Mower Blade NailGround Speed Control Lever Adjustment Speed Balancing AdjustmentNeutral Adjustment Return-to-Neutral AdjustmentTo Adjust Parking Brake Adjustment Hydraulic Pump Drive Belt ReplacementRear Suspension Adjustment To adjust the spring pre-loadSpring loaded components can kick back causing injury Deck Lift Rod Timing And Leveling Adjustment Mower Belt Replacement Mower PTO Belt Idler Arm Stationary Idler PulleyTroubleshooting Troubleshooting the RiderTroubleshooting the Rider Troubleshooting the MowerTroubleshooting Common Cutting Problems StreakingHP Briggs & Stratton HydroGear PG-3H / HGM-12EDeck Indentification Product Quick Specs