Husqvarna ZTH6125 Troubleshooting Checklist, Hydraulic Pump, Problem Cause Corrective action

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TROUBLESHOOTING

Hydraulic Pump

In most cases, problems with the drive system are not due to a defective pump but to slipping drive belts, partially engaged bypass valves, loose or damaged control linkages, etc. Be sure to check all of these before assuming a pump is faulty.The troubleshooting checklist below is designed to help determine the cause of problems.

Troubleshooting Checklist, Hydraulic Pump

WARNING!

Do not attempt any servicing or adjustments with the engine running. Take great care when inspecting drive belts, pulleys and motion control lever linkages!

Problem

Cause

Corrective action

Vehicle does not drive/track straight.

 

 

• Vehicle tires improperly inflated.

Adjust to proper pressure.

 

• Pump linkage bent, loose or

Repair, adjust or replace the

 

 

incorrectly adjusted.

linkages on both sides.

 

Bypass loose.

Tighten the bypass.

 

Inlet leak.

Check all connections and

 

 

 

hoses for leaks.

Unit is noisy.

Engine RPM high.

Adjust the speed regulator.

 

• Oil level low or oil contaminated.

Fill to proper level or change oil.

 

• Excessive loading (long grass).

Raise the cutting height, drive

 

 

 

more slowly.

 

• Air trapped in the hydraulic system.

Aerate the system.

 

Bypass loose.

Tighten bypass.

 

Inlet leak.

Check all connections and

 

 

 

hoses for leaks.

 

Clogged/damaged hydraulic filter.

Replace filter.

Unit has no/low power.

Engine RPM low.

Adjust the speed regulator.

 

• Pump linkage bent, loose or

Repair or adjust the linkages

 

 

incorrectly adjusted linkage system.

on both sides.

 

• Drive belt slipping or pulley

Repair/clean or replace drive belt.

 

 

damaged.

 

Oil level low or oil contaminated.

Excessive loading (long grass).

Air trapped in the hydraulic system.

Fill to proper level or change oil.

Raise the cutting height, drive more slowly.

Aerate the system.

English-66

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Contents ZTH Svenska Contents Workshop Manual RIDE-ON Lawn Mower ZTHEnglish-2 Safety Instructions Safety InstructionsGeneral Instructions Special InstructionsSafety Regulations Xxxxxxx xxxx xxxxxxxx xxx x. xxxx xxxxxx Explanation of SymbolsExplanation of Symbols Tools ToolsTechnical Data Technical DataZTH5223 ZTH6125ZTH5223 ZTH6125 Fuel capacity Litres 11.4 US Gal., 22 litresTightening torque, standard Bolts 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 Delivery and Dealer Service Delivery and Dealer ServicePre-delivery Service Charge the battery Mount the rear tiresHour Service Carry out a 25 hour serviceAfter the First 8 Hours Change the motor oilEnglish-13 At Least Once a Year Maintenance Schedule Daily Weekly Service Records English-18 Delivery Servicing Delivery ServicingTo our Dealers Removing the Mower from its PackagingDelivery Service Risk of incorrect assembly/fitting Important InformationADD Gasoline is highly flammable Take great care Administration Test RunningDesign and Function Design and FunctionGeneral Mower IdentificationEngine identification Brakes EngineDrive and Control With the belt and the other pulleys Belt is automatically adjusted by a springMower Deck Repairs RepairsRemoving Disconnect the cable from the starter motorFitting Checking and Adjusting the Throttle Wire Adjusting the Throttle WireAdjusting Throttle Lever Tension Checking and Adjusting the Choke Wire DiagramFuel tank Fire and health hazard Avoid spills Wipe dry if necessaryThree nuts 10 all with washers Springs 9 located on the underside of the splashguardAdjusting Motion Control Lever Linkages Adjusting Motion Control Lever Spring-backAdjusting the Park Brake See Hydraulic system\Hydraulic pump\Adjusting the linkagesZTH mower deck diagram Repairing Bearings Spindle Blade BearingsRemoving Bearings Roll the belt off see Changing BeltsOr any other damage. If they do, scrap Sharpening and Balancing BladesReplacing Bearings Setting the Mower Deck Adjusting Cutting HeightDeck Belt LevelingBelt Tensioning Assembly Hydraulic Pump Belt Changing Pump and Deck BeltsPump Belt Tensioning Assembly Front Wheel BearingsDismantling AssemblingEnglish-42 Troubleshooting Wiring AssemblyDiagram below shows the structure of the electrical system Electrical SystemZTH console harness ZTH frame harness Fuses BatteryRefer to the ZTH electrical system diagram Changing RelaysStarter Motor Contactor Ignition and Start Switch Hour MeterBlade Switch Troubleshooting GuideMower Deck Clutch Measuring the Supply VoltageMotion Control Switches Park Brake Interlock Switch Check that the start interlock functions correctlyWelding Hydraulics Hygiene Hydraulic SystemHydraulic System Keep Hydraulic Oil Clean Hydraulic OilsCorrect Oil Leaks Work MethodsZTH Hydraulic System Filling Hydraulic TankDraining fitting procedure is the reverse of the removal procedure Cooler for the Hydraulic SystemHydraulic Filter Hydraulic LinesHydraulic Pump Dismantling and Assembling FittingReverse Spring Detent Adjustment Stop the engine and remove the keyHydraulic Motors Dismantling and AssemblingWiring Harness TroubleshootingTroubleshooting To RUN? Clutch Problem Possible causes Clutch will not engage SolutionLarge more than Useful life 125/3.18 mm Brake will not engageFailed bearing Loose mounting bolt not tightened Faulty. Repair or replaceNoisy clutch/vibrations Troubleshooting Checklist, Hydraulic Pump Problem Cause Corrective actionEspecially the cooler ´+H¶6D¨ Svenska ´+H¶6D¨ 2002W20 Also See