Husqvarna ZTH6125 Problem Possible causes Clutch will not engage, Brake will not engage, Solution

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TROUBLESHOOTING

Problem	Possible causes
Clutch will not engage
Blown fuse.	•	Low coil resistance.
	•	Defective battery.
	•	Faulty charging system.
	• Bad wiring or connections,
		PTO switch
Low voltage supply.	•	Defective battery.
	•	Faulty charging system.
	• Bad wiring or connectors,
		PTO switch.
Incorrect coil resistance.	•	Damaged coil.
Inadequate current supply	•	Broken clutch lead wire.
	•	Faulty electrical system.

Rotor/armature air gap too	•	Rotor/armature wear. End of
large (more than		useful life.
0.125"/3.18 mm)
Brake will not engage
Armature/brake poles	•	End of useful life.
worn out.
Contaminated friction	•	Engine oil leak on brake.
surfaces.
Clutch slips
Low voltage supply.	•	Defective battery.
	•	Faulty charging system.
	• Bad wiring or connectors,
		PTO switch
Inadequate	•	Broken clutch lead wire.
current supply.	•	Faulty electrical system.

Solution

Replace with new MagStop unit.

Replace.

Repair or replace.

Repair or replace.

Replace.

Repair or replace.

Repair or replace.

Replace with new MagStop unit.

Repair.

Measure coil resistance and supply voltage at the clutch. If both are correct, electrical system is faulty. Repair or replace.

Replace with new MagStop unit.

Replace with new MagStop unit.

Repair leak.

Replace with new MagStop unit.

Replace.

Repair or replace.

Repair.

Repair.

Measure clutch coil resistance and supply voltage at the clutch. If both are correct, electrical system is

English-64

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Contents ZTH Svenska Contents Workshop Manual RIDE-ON Lawn Mower ZTHEnglish-2 General Instructions Safety InstructionsSafety Instructions Special InstructionsSafety Regulations Explanation of Symbols Explanation of SymbolsXxxxxxx xxxx xxxxxxxx xxx x. xxxx xxxxxx Tools ToolsZTH5223 Technical DataTechnical Data ZTH6125Tightening torque, standard Bolts ZTH5223 ZTH6125Fuel capacity Litres 11.4 US Gal., 22 litres 12 Nm 9 ft/lb 25 Nm 18 ft/lb 44 Nm 33 ft/lbAccessories 70 Nm 52 ft/lb 110 Nm 80 ft/lbEnglish-10 Pre-delivery Service Delivery and Dealer ServiceDelivery and Dealer Service Charge the battery Mount the rear tiresAfter the First 8 Hours Hour ServiceCarry out a 25 hour service Change the motor oilEnglish-13 At Least Once a Year Maintenance Schedule Daily Weekly Service Records English-18 To our Dealers Delivery ServicingDelivery Servicing Removing the Mower from its PackagingDelivery Service Risk of incorrect assembly/ﬁtting Important InformationADD Gasoline is highly ﬂammable Take great care Administration Test RunningGeneral Design and FunctionDesign and Function Mower IdentiﬁcationEngine identiﬁcation Engine Drive and ControlBrakes Belt is automatically adjusted by a spring Mower DeckWith the belt and the other pulleys Removing RepairsRepairs Disconnect the cable from the starter motorFitting Adjusting the Throttle Wire Adjusting Throttle Lever TensionChecking and Adjusting the Throttle Wire Checking and Adjusting the Choke Wire DiagramThree nuts 10 all with washers Fuel tankFire and health hazard Avoid spills Wipe dry if necessary Springs 9 located on the underside of the splashguardAdjusting the Park Brake Adjusting Motion Control Lever LinkagesAdjusting Motion Control Lever Spring-back See Hydraulic system\Hydraulic pump\Adjusting the linkagesZTH mower deck diagram Removing Bearings Repairing BearingsSpindle Blade Bearings Roll the belt off see Changing BeltsSharpening and Balancing Blades Replacing BearingsOr any other damage. If they do, scrap Deck Belt Setting the Mower DeckAdjusting Cutting Height LevelingBelt Tensioning Assembly Hydraulic Pump Belt Changing Pump and Deck BeltsDismantling Pump Belt Tensioning AssemblyFront Wheel Bearings AssemblingEnglish-42 Diagram below shows the structure of the electrical system TroubleshootingWiring Assembly Electrical SystemZTH console harness ZTH frame harness Battery Refer to the ZTH electrical system diagramFuses Relays Starter Motor ContactorChanging Ignition and Start Switch Hour MeterMower Deck Clutch Blade SwitchTroubleshooting Guide Measuring the Supply VoltageMotion Control Switches Park Brake Interlock Switch Check that the start interlock functions correctlyWelding Hydraulic System Hydraulic SystemHydraulics Hygiene Correct Oil Leaks Keep Hydraulic Oil CleanHydraulic Oils Work MethodsZTH Hydraulic System Hydraulic Tank DrainingFilling Hydraulic Filter ﬁtting procedure is the reverse of the removal procedureCooler for the Hydraulic System Hydraulic LinesHydraulic Pump Dismantling and Assembling FittingReverse Spring Detent Adjustment Stop the engine and remove the keyHydraulic Motors Dismantling and AssemblingTroubleshooting TroubleshootingWiring Harness To RUN? Clutch Large more than Useful life 125/3.18 mm Problem Possible causes Clutch will not engageSolution Brake will not engageFaulty. Repair or replace Noisy clutch/vibrationsFailed bearing Loose mounting bolt not tightened Troubleshooting Checklist, Hydraulic Pump Problem Cause Corrective actionEspecially the cooler ´+H¶6D¨ Svenska ´+H¶6D¨ 2002W20 Also See