Husqvarna ZTH5223, ZTH6125 manual Engine, Drive and Control, Brakes

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DESIGN AND FUNCTION

Engine

Husqvarna’s ride-on mowers for professional users have two-cylinder, air-cooled engines from Kawasaki.

Major engine repairs are not covered in this workshop manual. Users are referred to Kawasaki’s own manuals. These contain detailed information on the adjustment and repair of the engines. The manuals can be ordered from authorized service workshops.

The table below shows the information to be quoted when ordering engine manuals:

Model

Kawasaki’s

Power

Publication

engine type

Kawasaki no.

 

 

 

 

 

 

ZTH5223

FH680V-AS15

17.5 kW (23 hp)

99924-2045-03

ZTH6125

FH721V-AS04

18.6 kW (25 hp)

99924-2045-03

 

 

 

 

When repairing engines, use genuine spare parts only. The warranty will be invalidated if other parts are used.

Drive and Control

Via a belt, the engine supplies direct, clutchles, drive to two hydraulic pumps. The pumps have axial pistons.

Each pump feeds oil to a fixed (non-adjustable) hydraulic motor (one by each drive wheel). The rate and direction of oil flow is steplessly adjusted (via a mechanical linkage) by the motion control levers. Adjustment is actuated by a swash plate that regulates the stroke length of the hydraulic pistons. The swash plate is an integral part of each pump. The mower can be made to turn or reverse by controling the rate and direction of flow to the hydraulic motors. The hydraulic motors control the speed and direction of the drive wheels. To swing the mower around its center, simply drive one wheel forwards and the other backwards.

Hydrostatic braking occurs whenever there is no flow of oil from the pumps.

Instructions for the repair of the hydraulic pumps are given in the “Hydro-Gear BDP-10A/21L Service & Repair Manual”.

Brakes

Hydrostatic braking (see “Drive and Control”) provides brake control when the mower is being powered by its engine. Putting the motion control levers in the neutral position brakes the mower. To move the mower manually, open the air screws on the hydraulic pumps. Oil is then circulated by the hydraulic motors and the machine can be moved short distances at low speed.

The mower also has a park brake. This operates on both rear wheels. A brake band

8011-507

on each rear wheel is engaged by a lever on

Air screw on hydraulic pump

the left of the mower operator. The lever and

 

the brake bands are mechanically linked.

 

English-27

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Contents ZTH Svenska Workshop Manual RIDE-ON Lawn Mower ZTH ContentsEnglish-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 ZTH6125Fuel capacity Litres 11.4 US Gal., 22 litres ZTH5223 ZTH6125Tightening torque, standard Bolts 12 Nm 9 ft/lb 25 Nm 18 ft/lb 44 Nm 33 ft/lb70 Nm 52 ft/lb 110 Nm 80 ft/lb AccessoriesEnglish-10 Delivery and Dealer Service Delivery and Dealer ServicePre-delivery Service Charge the battery Mount the rear tiresCarry out a 25 hour service 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 Important Information Risk of incorrect assembly/fittingADD Gasoline is highly flammable Take great care Test Running AdministrationDesign 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 Diagram Checking and Adjusting the Choke WireFire and health hazard Avoid spills Wipe dry if necessary Fuel tankThree nuts 10 all with washers Springs 9 located on the underside of the splashguardAdjusting Motion Control Lever Spring-back Adjusting Motion Control Lever LinkagesAdjusting the Park Brake See Hydraulic system\Hydraulic pump\Adjusting the linkagesZTH mower deck diagram Spindle Blade Bearings Repairing BearingsRemoving Bearings Roll the belt off see Changing BeltsOr any other damage. If they do, scrap Sharpening and Balancing BladesReplacing Bearings Adjusting Cutting Height Setting the Mower DeckDeck Belt LevelingBelt Tensioning Assembly Changing Pump and Deck Belts Hydraulic Pump BeltFront Wheel Bearings Pump Belt Tensioning AssemblyDismantling AssemblingEnglish-42 Wiring Assembly TroubleshootingDiagram 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 Hour Meter Ignition and Start SwitchTroubleshooting Guide Blade SwitchMower Deck Clutch Measuring the Supply VoltageMotion Control Switches Check that the start interlock functions correctly Park Brake Interlock SwitchWelding Hydraulics Hygiene Hydraulic SystemHydraulic System Hydraulic Oils Keep Hydraulic Oil CleanCorrect Oil Leaks Work MethodsZTH Hydraulic System Filling Hydraulic TankDraining Cooler for the Hydraulic System fitting procedure is the reverse of the removal procedureHydraulic Filter Hydraulic LinesDismantling and Assembling Fitting Hydraulic PumpStop the engine and remove the key Reverse Spring Detent AdjustmentDismantling and Assembling Hydraulic MotorsWiring Harness TroubleshootingTroubleshooting To RUN? Clutch Solution Problem Possible causes Clutch will not engageLarge more than Useful life 125/3.18 mm Brake will not engageFailed bearing Loose mounting bolt not tightened Faulty. Repair or replaceNoisy clutch/vibrations Problem Cause Corrective action Troubleshooting Checklist, Hydraulic PumpEspecially the cooler ´+H¶6D¨ Svenska ´+H¶6D¨ 2002W20 Also See
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