Exmark 4500-355 manual Troubleshooting, Problem Possible Cause Corrective Action

Page 37

Troubleshooting

Troubleshooting

Important: It is essential that all operator safety mechanisms be connected and in proper operating condition prior to mower use.

When a problem occurs, do not overlook the simple causes. For example: starting problems could be caused by an empty fuel tank.

The following table lists some of the common causes of trouble. Do Not attempt to service or replace major items or any items that call for special timing of adjustments procedures (such as valves, governor, etc.). Have this work done by your Engine Service Dealer.

Note: When disconnecting electrical connectors Do Not pull on the wires to separate the connectors.

Problem

 

Possible Cause

 

Corrective Action

 

 

 

 

 

Engine will not start, starts hard, or fails to

1.

Fuel tank is empty.

1.

Fill the fuel tank.

keep running.

2.

Fuel shutoff valve is closed.

2.

Open the fuel shutoff valve.

 

 

3.

The throttle and choke are not in the

3.

Be sure the throttle control is midway

 

 

correct position.

 

between the “SLOW” and “FAST”

 

 

 

 

positions, and the choke is in the “ON”

 

 

 

 

position for a cold engine or the “OFF”

 

 

 

 

position for a warm engine.

 

4.

Dirt in fuel filter.

4.

Replace the fuel filter.

 

5.

Dirt, water, or stale fuel is in the fuel

5.

Contact an Authorized Service Dealer.

 

 

system.

 

 

 

6.

Air cleaner is dirty.

6.

Clean or replace the air cleaner element.

 

7.

Electrical connections are corroded, loose

7.

Check the electrical connections for

 

 

or faulty.

 

good contact. Clean connector terminals

 

 

 

 

thoroughly with electrical contact cleaner,

 

 

 

 

apply dielectric grease and reconnect.

 

8.

Relay or switch is defective.

8.

Contact an Authorized Service Dealer.

 

9.

Faulty spark plug.

9.

Clean, adjust or replace spark plug.

 

10.

Spark plug wire is not connected.

10.

Check the spark plug wire connection.

 

11.

PTO is engaged.

11.

Disengage the PTO.

 

12.

Speed control lever is not in neutral

12.

Ensure the shifter lever is in the neutral

 

 

position.

 

position.

 

13.

OPC levers are released.

13.

Depress OPC levers.

 

 

 

 

 

Engine loses power.

1.

Engine load is excessive.

1.

Reduce the ground speed.

 

2.

Air cleaner is dirty.

2.

Clean or replace the air cleaner element.

 

3.

Oil level in the crankcase is low.

3.

Add oil to the crankcase.

 

4.

Cooling fins and air passages for the

4.

Remove the obstructions from the cooling

 

 

engine are plugged.

 

fins and air passages.

 

5.

Vent hole in the fuel cap is plugged.

5.

Clean or replace the fuel cap.

 

6.

Dirt in fuel filter.

6.

Replace the fuel filter.

 

7.

Dirt, water, or stale fuel is in the fuel

7.

Contact an Authorized Service Dealer.

 

 

system.

 

 

 

 

 

 

 

Engine overheats.

1.

Engine load is excessive.

1.

Reduce the ground speed.

 

2.

Oil level in the crankcase is low.

2.

Add oil to the crankcase.

 

 

 

 

 

Mower pulls left or right (with levers fully

1.

Tracking needs adjustment.

1.

Adjust the tracking by turning knob on the

forward).

 

 

 

right hydro control linkage in the direction

 

 

 

 

that the mower needs to be adjusted to.

 

 

 

 

Turn the knob in 1/4 turn increments

 

 

 

 

until the mower tracks correctly.

 

2.

Tire pressure in drive tires not correct.

2.

Adjust tire pressure in the drive tires.

 

 

 

 

 

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Contents Viking Hydro California Introduction Contents Safety Alert Symbol SafetySafe Operating Practices TrainingSafety Slope Operation OperationMaintenance and Storage Safety Safety and Instructional Decals 103-1798 103-2076 103-2103 103-2196 103-2242 116-0404 103-2243 103-4935 103-5626 Model Numbers SpecificationsSystems Torque Requirements DimensionsControls Product Overview OperationOperator Presence Control OPC LeversTracking Adjustment Knob Off-Run SwitchNeutral Lock Latch Park Brake LeverOperating Instructions Pre-StartStopping the Engine Disengaging the PTODriving the Machine Transporting a Unit TransportingRecommended Maintenance Schedules MaintenanceCheck Mower Blades Check Engine Oil LevelReplacing the Discharge Deflector Check for Loose Hardware Check Safety Interlock SystemChange Engine Oil Service Pre-Cleaner Element and Air CleanerCheck Hydraulic Oil Level Check Tire PressuresCheck Spark Plugs Lubricate Grease FittingsChange Fuel Filter Change Hydraulic System FilterLevel Hydraulic System Air PurgeThread Locking Adhesives Wheel Hub-Slotted Nut Torque SpecificationMobil HTS Grease Or Food-Grade Anti-seize Copper-Based Anti-seizeAdjusting the Cutting Height AdjustmentsAdjusting the Axle Position Adjusting the Cutting Height with Blade Spacers Adjusting the Number of Spacers below Caster Support HubPTO Safety Switch Adjustment PTO Engagement Linkage AdjustmentInch Deck Shown for Reference Only Engine to Mower Deck Belt AdjustmentBelt Guide Adjustment Blade Brake AdjustmentPump Drive Belt Tension Adjustment Hydro Drive Linkage Adjustment Adjust Hydro Control Linkages Park Brake Adjustment Hydro Pump Spring Tension SettingRemove Engine Shrouds and Clean Cooling Fins Clean Engine Air Cooling SystemClean Grass Build-Up Under Deck Waste DisposalProblem Possible Cause Corrective Action TroubleshootingTroubleshooting Wiring Diagram SchematicsSchematics Exmark Commercial Turf Equipment Page Page See EXMARK’S Complete Line of Accessories and Options