Manuals / Toro / Lawn and Garden / Lawn Mower

Toro 3000D manual Diode Circuit Boards

Models: 3000 3000D

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Diode Circuit Boards

Each circuit board contains four diodes. The diodes are used for circuit protection from inductive voltage spikes, battery charging indication, and for safety circuit logic. Diodes D4 and D8 are not used.

On the GM 3000 wiring diagram, the diode circuit cards a designated P3 and P5. On the GM 3000–D wiring dia- grams, the diode circuit cards are designated P7 and P5.

Diode D1

Directs current flow from the deck capacitor to the deck relay when the seat relay is de–energized to provide a 1 second delay.

Diode D2

Provides current flow logic for the charging circuit light.

Diode D3

Prevents a negative spike from damaging the PTO switch by allowing a ground path for the PTO relay and PTO coil when they de–energize.

Diode D4

This component is not used.

Diode D5

Prevents a negative spike from damaging the Lift/Xbal switch by allowing a ground path for the Lift/Xbal sole noid (SV1) when it de–energizes.

Diode D6

Prevents a negative spike from damaging the Cruise switch by allowing a ground path for the Cruise relay and Cruise coil when they de–energize.

Diode D7

Prevents a negative spike from damaging the Transport switch by allowing a ground path for the Transport relay and Transport coil when they de–energize.

Diode D8

Prevents a negative spike from damaging the Float/ Hold switch by allowing a ground path for the Float/Hold solenoid (SV2) when it de–energizes.

Testing

The diodes can be individually tested using a digital multimeter (ohms setting) and the table to the right.

D2

	D6
	D4
	D8
	D3
	D7
	D1
	D5
A B C D	DIODE	E F G H
	DIODE
	DIAGRAM

	Figure 6

P3 or P7	P5

DIODE

CIRCUIT BOARDS

Figure 7

Red Lead (+)	Black Lead (–)	Continuity
on Terminal	on Terminal	Continuity

H	A	YES


A	H	NO


G	B	YES


B	G	NO


F	C	YES


C	F	NO


E	D	YES


D	E	NO

DIODE CIRCUIT BOARD

Figure 8

Electrical System

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Groundsmaster 3000/3000–D

Image 116

Toro 3000D manual Diode Circuit Boards

Contents

Preface Toro Company 1997, 1998, 2003Groundsmaster 3000/3000-D Table Of Contents Groundsmaster 3000/3000-D Contour 82I Cutting Unit Electrical Diagrams 84I Cutting Units 72I Cutting UnitsGroundsmaster 3000/3000-D Before Operating Safety InstructionsChapter Safety Groundsmaster 3000/3000-D While OperatingMaintenance On Control Panel Safety and Instruction Decals GroundsmasterSafety 1 4 Rev. a Groundsmaster 3000/3000-D Safety and Instruction Decals Groundsmaster 3000-D Groundsmaster 3000/3000-D 1 5 Rev. a SafetySafety and Instruction Decals 84I Cutting Units Safety 1 6 Rev. a1 7 Rev. a Safety On Rear of Deck On Front of Deck On Rear Of DeckOn Each Castor Arm On Each Castor Arm On Deck Channels, Under CoversSafety and Instruction Decals Contour 82I Cutting Unit On Top of Rear Castor Chambers 2Groundsmaster 3000/3000-D Safety On Front Deck HangerOn Gearbox Base On Front of Deck Deck On Each Corner On Right Rear Top of Deck Under CoverOn Front of Deck On Rear Of Deck Safety Groundsmaster 3000/3000-D Product Records and Maintenance Product RecordsProduct Records and Maintenance Groundsmaster 3000/3000-D Equivalents and ConversionsTorque Specifications Product Records and Maintenance 2 4 Rev. a Lubrication Traction UnitCutting Units Rear Discharge 84I Cutting Unit Contour 82I Cutting UnitPage Equipment Operation and Service History Report GroundsmasterR3000 Maintenance Schedule Annual RecommendationsGroundsmasterR3000 Daily Maintenance Check List Maintenance Daily Maintenance Check For Week Check Item bRecords Service RequiredB Service Required Groundsmasterr 3000-D GroundsmasterR3000-D Maintenance Schedule Product Records and Maintenance 2 14 Rev. BGroundsmasterR3000-D Daily Maintenance Check List Service every 100 hours C, and D Service RequiredService 2 16 Rev. aFord VSG-411 Engine Groundsmaster Ford VSG-411 EngineGeneral Information Specifications Ford VSG-411 Engine 3 2 Rev. a GroundsmasterAdjustments Belt AdjustmentsAlternator Belt Cooling & Governor Fan BeltsGovernor Adjustment Ford VSG-411 Engine GroundsmasterService and Repairs Outside TemperatureCheck Engine Oil Single Viscosity OilsChange Engine Oil and Filter Check Coolant Cooling System Service Maintaining Cooling System CapacityGeneral Air Cleaner Service Service Air CleanerWashing Method Compressed Air MethodFuel Lines and Connections Fuel System ServiceFuel Tank Replacing Spark Plugs Check Governor Oil LevelServicing Spark Arrestor Muffler Peugeot TUD5 Engine Peugeot TUD5 EnginePeugeot TUD5 Engine Groundsmaster 3000-D Air Filter Element Cleaner TOR277220 Special ToolsCompression Test Kit TOR3003A Valve Spring Compression Tool TOR4024TPeugeot TUD5 Diesel Engine Service Tool Kit TOR4080 Injection Nozzle Tester TOR463610Digital Belt Tension Tool TOR4075 Order separatelyTorque Angle Gauge TOR4083 Valve Guide Seal Remover TOR4081Injector Socket TOR4082 Timing Pin Set TOR4085 Camshaft Pinion Setting Tool TOR4084Rear Main Seal Installer TOR4086 Front Seal Installer TOR4087 Camshaft Seal Installer TOR4088Engine Belts Fan BeltNot Overfill Change Engine Oil and Filter Check Cooling System El. Coolant level should be up to or above tabs In deRear Screen Oil Cooler Radiator General Air Cleaner Maintenance Servicing the Air CleanerArea. Always fill fuel tank outside and wipe Up any spilled diesel fuel before startingDraining Fuel Filter / Water Separator Changing Fuel FilterPriming Fuel System Frame, Fuel Tank and Battery Muffler and Bumper Hood Center Shroud and Air Cleaner RopsFan Bracket and Degasser Radiator and Cooler 4 21 Rev. a Peugeot TUD5 EngineEngine Peugeot TUD5 Overhaul, Checking Tuning Peugeot TUD5 Engine Groundsmaster 3000-D Hydraulic System and Transaxle Hydraulic SystemHydraulic System 5 2 Rev. a General Information Pushing or Towing Traction UnitRing Face Seal Hydraulic Fitting InstallationHydraulic Hoses SAE Straight Thread O-Ring Port Non-adjustable SAE Straight Thread O-Ring Port AdjustableHydraulic Schematic Lift OFF Hold LOWER/FLOAT5 7 Rev. a Hydraulic System Hydraulic System TransaxleHydraulic Components Hydraulic System Groundsmaster 3000/3000-DMeasuring Container TOR4077 Hydraulic Pressure Test Kit TOR47009Hydraulic Test Fitting Kit TOR4079 Hydraulic System Groundsmaster 3000/3000-D Testing Charge Pressure Test Charge Pressure Priority Valve TestForward Traction Test Reverse Traction TestImplement Relief Pressure Test Counterbalance Pressure Test and Adjustment 5 15 Rev. a Hydraulic SystemSteering Circuit Test Cylinder TestSteering Valve Test Hydraulic System 5 16 Rev. aUse a tester with pressure and flow capabilities This page is blank Hydraulic System Traction Pedal Linkage Adjustment Service Brake AdjustmentWheel and Tires LubricationCheck Tire Pressure 5 21 Rev. a Hydraulic SystemCheck Hydraulic Fluid BP HYD TFChange Hydraulic Oil and Filter Traction Control Linkage Brake Linkage Driveshafts Lift Arms Steering Control ÁÁÁÁÁÁÀÀÀ#1ÄÄÉÉÉÉÉÅÅÅ After Repair or Replacement of Components Removing Hydraulic System ComponentsManifold Block Hydraulic System 5 32 Rev. a Cartridge InstallationCartridge Valves Lift Cylinder Steering Cylinder Auxiliary Hydraulic Pump Model 30726 Hydraulic Kit 5 35 Rev. a Hydraulic SystemTransaxle Service Electrical System Electrical Schematics, Wiring Diagrams, and Harness Drawings Electrical System Groundsmaster 3000/3000-DMultimeter Skin-Over GreaseProblem Possible Causes Troubleshooting GroundsmasterStarting Problems 6 5 Rev. a Electrical System General Run and Transport Problems GroundsmasterCutting Unit Operating Problems Groundsmaster Troubleshooting Groundsmaster 3000-D 6 7 Rev. a Electrical System General Run and Transport Problems GM 3000-DCutting Unit Operating Problems GM 3000-D Battery Test Open Circuit Test Voltage Measured Battery Charge LevelElectrical System Quick Checks Glow Plug System Test GM 3000-DComponent Identification and Testing Ignition SwitchDiode Circuit Boards 6 11 Rev. a Electrical System Neutral SwitchSeat Switch Electrical System 6 12 Rev. a Hydraulic Valve SolenoidsHour Meter 6 13 Rev. a Electrical System Cruise Control Coil OptionalPTO Clutch Coil Electrical System 6 14 Rev. a Fuel SenderFuel Gauge Relays and Fuses Relay TestingFuse Testing Ampere Thermal Breaker GM 3000-D Electrical System 6 16 Rev. aPlace Testing Live testingFuel Stop Solenoid GM 3000-D 6 17 Rev. a Electrical SystemInjection Advance Solenoid GM 3000-D Electrical System 6 18 Rev. aTesting for DC Current Output Fig Alternator GM 3000-DTest Equipment 6 19 Rev. a Electrical SystemTemperature Sender GM 3000-D Electrical System 6 20 Rev. aTemperature Gauge GM 3000-D Oil Pressure Switch GM 3000-DTesting with the Engine Off Testing with the Engine OnTemperature Sending Unit GM 3000-D Electrical System 6 22 Rev. a6 23 Rev. a Electrical System Transport Solenoid GM 3000-DGlow Plugs GM 3000-D H2O in Fuel Sensor GM 3000-D Disconnect connector from the sensor. Unscrew Coolant Level Sensor GM 3000-DIndicator Lights and Circuits GM 3000-D Glow Plug Indicator Light Ford Engine VSG-411 Electrical Component Locations GM3000 Electrical System Temperature Gauge GM Thermistor GMHandle the hot oil with extreme care to prevent Personal injury or fireOil Pressure Switch GM High Temperature Switch Anti-Dieseling Valve Solenoid GM Indicator Lights and Circuits GM Verify Interlock System Operation Battery Maintenance Battery Service Inspection, Maintenance, and TestingImportant Before cleaning the battery, tape or Caps are on tightlyMinimum Battery Electrolyte Battery Charge Specific Open Circuit BatteryCharging Gravity VoltageElectrical System Groundsmaster 3000/3000-D 2WD Rear Axle 7 1 Rev. aRear Wheel Toe-In 2WD Rear Axle Groundsmaster 3000/3000-DWheel and Tire Service 7 3 Rev. aWheel Bearing Service Rear Axle 2WD Rear Axle Groundsmaster 3000/3000-D 4WD Rear Axle 8 1 Rev. a4WD Rear Axle Groundsmaster 3000/3000-D 8 3 Rev. a Check Rear Axle Lubricant Change Rear Axle Lubricant4WD Axle Spindle flange Differential shim kit 4WD Rear Axle Groundsmaster 3000/3000-D Cutting Units Inch Cutting UnitsSpecifications Transport Latch Adjustment Height of Cut Adjustment Inch Cutting Units Groundsmaster 3000/3000-DBolt Skid AdjustmentAnti-Scalp Roller Adjustment Deck Pitch Adjustment Check Gear Box Lubricant Replace Gear Box LubricantLubricate Bearings, Bushings and Gear Box Disconnect Cutting Unit From Traction Unit Connect Cutting Unit to Traction Unit 9 11 Rev. a Inch Cutting Units Install Lift Arm Ball JointsDrive Belt Replacement Front Castor Fork Bushing Service Castor Wheel and Bearing Service Cutter Blade Removal and Installation Inspecting and Sharpening Blade Disassembly Blade Spindle ServiceRemoving Spindle Housing Assembly Installing Spindle, Bearings Seals Into Spindle Housing 9 17 Rev. a Inch Cutting UnitsCorrecting Cutting Unit Mismatch Gearbox Shaft End Play Adjustment Drive Shaft Inch Cutting Units Groundsmaster 3000/3000-D Contour 82I Cutting Unit 10 1 Rev. C Contour 82 Cutting UnitSpecifications Front Castor Wheels Rear Castor Wheels Contour 82 Cutting Unit Groundsmaster 3000/3000-DRear Deck Chain Deck Pitch Adjustment Grease Bearings and Bushings Needle Valve Latch Cover Connect Cutting Unit to Traction Unit Castor arm tube Bushing 60 80 ft-lb 11 Kgm Castor wheel Bearing Front Caster Fork Cutting Blade Removal and Installation Inspecting and Sharpening Blade Correcting Cutting Unit Mismatch Chamber Pivot Service Cutting Unit ContourContour 82 Cutting Unit 10 16 Rev. a Front Part Of Blade Inch 6 mmLift Arm Ball Joint Installation Hydraulic Motor and Blade 10 19 Rev. C Contour 82 Cutting UnitContour 82 Cutting Unit 10 20 Rev. C Assembly Important When greasing spindles, greaseBearing cavity of the housing. If grease does not Passes into the center of the shaft and out to fillHydraulic Assembly Contour 82 Cutting Unit 10 22 Rev. C72I Cutting Units Specifications Guardian Recycler Height of Cut Adjustment Skid Flange nut Gage Wheel Adjustment Rear Discharge Cutting Unit Deck Pitch Adjustment After 50 hours of operation Grease Bearings, Bushings and Gear Box Disconnect Cutting Unit From Traction Unit 11 11 Rev. a Inch Cutting Units Gear Box Plate Capscrews & Nuts Wavey Washer 60 80 ft-lb 8 11 Kgm Bearing Spacer Cutter Blade Removal Inspecting and Sharpening Blade 85 110 ft-lb 12 15 Kgm Inch Cutting Units 11 18 Rev. a Correcting Cutting Unit Mismatch 170 190 in-lb 196 219 Kgcm Shaft End Play Adjustment Drive Shaft Electrical Diagrams Electrical Diagrams Groundsmaster 3000/3000-D Electrical Schematic OptionalStart Circuits Run Circuits Temp GaugeWiring Diagram Rear Section Wiring Diagram Front Section Gauge Hour Ignition Switch Hold SW PTO Switch OverrideHarness Drawing Rear Section Harness Drawing Front Section All relays and solenoids are shown as de-energized Crank Circuits Optional Cruise Control Wiring Diagram Rear Section Wiring Diagram Front Section Switch Ground Sender Input Power