Caterpillar 973 Track Loader & 973 Ripper Workshop Repair Service Manual PDF 26Z 32Z 66G 86G 90L 91L MKL 11B - MCAT973OPEK.zip

The full service and repair guide—complete with electrical wiring diagrams—for the Caterpillar 973 TRACK LOADERS & 973 RIPPERS, containing every technical detail needed to service, troubleshoot, fix, and overhaul these machines the way a professional technician would.

Inside the Caterpillar 973 TRACK LOADERS & 973 RIPPERS workshop service repair manual you'll find:

* Numbered table of contents easy to use so that you can find the information you need fast.

* Detailed sub-steps expand on repair procedure information

* Numbered instructions guide you through every repair procedure step by step.

* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.

* Notes, cautions and warnings throughout each chapter pinpoint critical information.

* Bold figure number help you quickly match illustrations with instructions.

* Detailed illustrations, drawings and photos guide you through every procedure.

* Enlarged inset helps you identify and examine parts in detail.

PRODUCT DETAILS:

Total Pages: 3,012 pages

File Format: PDF (Internal Links, Bookmarked, Table of Contents, Searchable, Printable, high quality)

Language: English

TRACK-TYPE LOADER

Model Prefix

973 RIPPER 11B

973 TRACK LOADER 26Z

973 TRACK LOADER 32Z

973 TRACK LOADER 66G

973 TRACK LOADER 86G

973 TRACK LOADER 90L

973 TRACK LOADER 91L

973 TRACK LOADER MKL

RENR3686 - Troubleshooting (973 Track-Type Loader Hydrostatic Power Control Unit).........1

Incorrect Center Pedal Response - Check SMCS - 4269-535.........2

Incorrect Steering Pedal Response - Check SMCS - 4343-535.........4

Incorrect Transmission Control Lever Response - Check SMCS - 3065-535.........8

Lack of Power - Check SMCS - 1000-535.........12

Machine Hesitates before Starting to Move or Machine Accelerates Slowly - Check SMCS - 7000-535.........23

Machine Moves Slowly at HIGH IDLE - Check SMCS - 7000-535.........27

Machine Will Not Move - Check SMCS - 7000-535.........38

Machine Will Not Track Straight in FORWARD or in REVERSE - Check SMCS - 4150-535.........60

One Track Starts before the Other Track Starts - Check SMCS - 4150-535.........67

One Track Stops before the Other Track Stops - Check SMCS - 4150-535.........70

Machine Operation - Check SMCS - 7000-535.........71

Overheating of Machine Systems - Check SMCS - 7000-535.........87

Pressure Surge - Check SMCS - 3030-535.........101

Visual Walk-Around Inspection - Check SMCS - 7000-535.........114

SENR1819 - Schematic (973 Track-Type Loader Electrical System).........117

Collage.........118

Main.........148

SENR2456 - System Operation & Testing and Adjusting (973 TRACK-TYPE LOADER).........150

Model Views SMCS - 5050.........152

Engine Design SMCS - 5050.........153

Fuel System Systems Operation SMCS - 5050.........154

Fuel System Testing And Adjusting SMCS - 5050.........166

Air Inlet And Exhaust System Systems Operation SMCS - 5050.........201

Air Inlet And Exhaust System Testing and Adjusting SMCS - 5050.........204

Lubrication System Systems Operation SMCS - 5050.........210

Lubrication System Testing and Adjusting SMCS - 5050.........213

Cooling System Systems Operation SMCS - 5050.........217

Cooling System Testing And Adjusting SMCS - 5050.........219

Basic Block Systems Operation SMCS - 5050.........225

Introduction SMCS - 5050.........238

Hydrostatic Transmission Systems Operation.........249

Hydrostatic Transmission Testing and Adjusting SMCS - 5050.........295

Final Drives And Undercarriage Systems Operation SMCS - 5050.........346

Systems Operation SMCS - 5050.........358

Testing And Adjusting SMCS - 5050.........372

Systems Operation.........432

Testing And Adjusting.........439

Troubleshooting Methods SMCS - 5050.........442

Codes And Abbreviations SMCS - 5050.........444

Block Diagram SMCS - 5050.........446

Location And Identification Of Electrical Components SMCS - 5050.........448

Connector Identification And Locations SMCS - 5050.........452

Electronic Monitoring System SMCS - 5050.........455

Troubleshooting The Electronic Monitoring System (E.M.S.) Operator Panel SMCS - 5050.........457

Individual Circuit Description - (Simplified Schematics) SMCS - 5050.........483

Introduction.........510

Hydraulic Pumps SMCS - 5050.........516

Checking Pump Efficiency SMCS - 5050.........518

Lift And Tilt Pilot Valve SMCS - 5050.........520

Attachment (Third) Pilot Valve SMCS - 5050.........531

Lift And Tilt Control Valve SMCS - 5050.........536

Combiner And Shuttle Valves SMCS - 5050.........549

Diverter (Fourth) Valve SMCS - 5050.........553

Relief Valves SMCS - 5050.........554

Bucket Control Group SMCS - 5050.........563

Oil Cooler SMCS - 5050.........564

Oil Cooler Supply Valve SMCS - 5050.........565

Oil Filters SMCS - 5050.........567

Lift Kickout SMCS - 5050.........569

Bucket Positioner SMCS - 5050.........572

Tilt Circuit SMCS - 5050.........575

Lift Circuit SMCS - 5050.........580

Third Circuit SMCS - 5050.........588

Fourth Circuit (Diverter Valve) SMCS - 5050.........593

Troubleshooting SMCS - 5050.........596

SENR2457 - Specifications (973 TRACK-TYPE LOADER).........608

Engine Design SMCS - 5063.........612

Fuel Injection Equipment SMCS - 5063.........613

Fuel Transfer Pump SMCS - 5063.........615

Governor SMCS - 5063.........616

Air-Fuel Ratio Control SMCS - 5063.........618

Governor Control Group (8G1263).........620

Timing Gears SMCS - 5063.........622

Valves SMCS - 5063.........624

Camshaft SMCS - 5063.........627

Valve Rocker Arms And Lifters SMCS - 5063.........630

Cylinder Head SMCS - 5063.........631

Valve Cover SMCS - 5063.........632

Exhaust Manifold SMCS - 5063.........633

Exhaust Pipe And Muffler SMCS - 5063.........634

Turbocharger Impeller Installation (Schwitzer Only).........636

Turbocharger (Schwitzer F302).........637

Oil Pump SMCS - 5063.........639

Oil Filter SMCS - 5063.........642

Oil Breather Cap SMCS - 5063.........643

Engine Oil Pressure SMCS - 5063.........644

Water Pump SMCS - 5063.........645

V-Belt Tension Chart SMCS - 5063.........647

Radiator SMCS - 5063.........648

Water Temperature Regulator SMCS - 5063.........650

Cylinder Block SMCS - 5063.........651

Cylinder Liner SMCS - 5063.........654

Cylinder Liner Projection SMCS - 5063.........655

Connecting Rod SMCS - 5063.........658

Pistons And Rings SMCS - 5063.........660

Crankshaft SMCS - 5063.........662

Bearing Surface (Journal) For Main Bearings SMCS - 5063.........664

Bearing Surface (Journal) For Connecting Rods SMCS - 5063.........666

Main Bearings And Connecting Rod Bearings SMCS - 5063.........668

Trunnion SMCS - 5063.........669

Timing Gear Cover SMCS - 5063.........670

Crankshaft Hub And Pulley SMCS - 5063.........671

Flywheel SMCS - 5063.........672

Engine Front Support SMCS - 5063.........673

Flywheel Housing SMCS - 5063.........674

Flywheel Runout SMCS - 5063.........675

Flywheel Housing Runout SMCS - 5063.........678

Flywheel Housing Bore SMCS - 5063.........680

Introduction SMCS - 5063.........683

Hydraulic Pump (3G2185).........685

Hydraulic Pump (9J4833 and 9J4834).........687

Speed Control Valve (3G5004).........688

Main Control Valve (3G3304).........690

Track Motors (3G5014).........692

Pilot-overspeed Valve (4T886).........696

Joint Assembly (4T313).........697

Governor Control Group (8G1263) .........698

Steering Control Group (8G1268) .........700

Speed and Direction Control Group (8G1262).........703

Speed Override and Brake Control Group (7P2563) .........705

Hydrostatic Transmission Case Group (1U2217).........707

Track Brakes (7P2678).........713

Servo Linkage Group (3G623).........715

Likage Group-Transmission (3G5931).........717

9J1839 Relief Valve 1U2043 Bypass Valve.........718

Underspeed Override Valve (1U1723).........719

Charge And Relief Valve (9J365).........720

Charge and Relief Valve (3G5008).........722

Servo Cylinder Groups (3G5016 and 3G5017).........724

Under Speed Valve (3G7261).........725

Final Drive Group (8G277).........727

Track (7P4002).........730

Front Idler Groups (7P7641).........731

Pivot Bar Group.........734

Track Adjustment.........735

Track Carrier Rollers.........737

Track Rollers.........738

Introduction.........740

Refrigerant Compressor.........741

Air Conditioner Group.........742

R-12 Refrigerant.........744

Refrigerant Oil.........745

Torque For Fittings.........746

Alternators.........747

Starter Motors.........750

Starter Solenoids.........753

Engine Coolant Temperature Switch (Ether Aid Shut-Off).........756

Transmission Oil Temperature Switch.........757

Engine Coolant Temperature Switch.........758

Engine Oil Pressure Switch.........759

Fuel Pressure Switch.........760

Hydraulic Pump For Pilot Oil System.........761

Hydraulic Pump For Main Oil System.........763

Filter And Tank Group.........766

Lift And Tilt Pilot Valve.........768

Attachment Pilot Valve.........771

Control Valves For Lift And Tilt And Attachment.........773

Combiner Valve.........777

Wear Plates; Bit And Cutting Edge Groups And Tooth Groups.........779

Main Relief Valve For Large Section Of Main Hydraulic Pump.........780

Relief Valve For Small Section Of Main Hydraulic Pump.........782

Relief Valve For Head End Of Lift Cylinders.........783

Relief Valve For Pilot Pump.........784

Relief Valves.........785

Diverter Valve And Control Group.........786

Two-Lever (Lift And Tilt) Control Group.........788

Three-Lever (Attachment) Control Group.........790

Single (Lift And Tilt) Control Group.........791

Two-Lever (Attachment) Control Group.........793

Bucket Control Group.........795

Lift Kickout Adjustment Procedure.........798

Bucket Positioner Adjustment Procedure.........800

Lift Cylinders.........801

Tilt Cylinder.........802

Multi-Purpose Bucket Cylinders.........803

Ripper Cylinders.........804

Ripper Cylinder Mounting Group.........805

Ripper Mounting Group.........806

SENR2458 - Disassembly and Assembly (973 TRACK-TYPE LOADERS).........808

TURBOCHARGER.........813

EXHAUST MANIFOLD.........824

VALVE COVER.........826

ROCKER SHAFT AND PUSH RODS.........830

ROCKER SHAFT.........833

CYLINDER HEAD AND SPACER PLATE.........836

CYLINDER HEAD.........842

FAN BELTS.........848

FAN.........850

FAN DRIVE.........853

PRESSURE RELIEF VALVE.........859

RADIATOR AND TRANSMISSION OIL COOLER.........861

RADIATOR AND GUARD ASSEMBLY.........867

WATER TEMPERATURE REGULATOR.........873

WATER PUMP.........875

FUEL TANK.........884

GOVERNOR CONTROL.........891

FUEL INJECTION NOZZLES.........897

FUEL INJECTION LINES.........900

FUEL RATIO CONTROL.........909

FUEL INJECTION PUMP HOUSING AND GOVERNOR.........915

GOVERNOR.........923

FUEL INJECTION PUMPS.........940

FUEL INJECTION PUMP HOUSING.........946

OIL COOLER BYPASS VALVE; OIL FILTER BYPASS VALVE.........952

OIL COOLER.........954

OIL PAN PLATE.........958

OIL PUMP.........960

PISTON COOLING ORIFICES.........969

VALVE LIFTERS; PISTONS.........971

PISTONS.........974

CYLINDER LINERS.........979

CONNECTING ROD BEARINGS.........983

CRANKSHAFT MAIN BEARINGS.........989

VIBRATION DAMPER AND PULLEY.........993

CRANKSHAFT FRONT SEAL AND WEAR SLEEVE.........999

TIMING GEAR COVER.........1002

TIMING GEARS AND PLATE.........1006

CAMSHAFT.........1009

ENGINE.........1011

FLYWHEEL; FLYWHEEL RING GEAR.........1018

CRANKSHAFT REAR SEAL.........1020

FLYWHEEL HOUSING.........1022

HYDRAULIC PUMP GEAR TRAIN.........1025

CAMSHAFT BEARINGS.........1030

CRANKSHAFT AND GEAR.........1033

FORWARD-REVERSE CONTROLS.........1037

SPEED-BRAKE CONTROL.........1049

STEERING CONTROLS.........1055

FINAL DRIVES AND SPROCKET ASSEMBLIES.........1063

AIR NEUTRAL ADJUSTMENT OF SERVO VALVES.........1082

SERVO CYLINDERS.........1087

DRIVE COUPLING.........1094

HYDROSTATIC POWER CONTROL UNIT LINKAGE (INTERNAL).........1097

MECHANICAL ADJUSTMENT OF HYDROSTATIC POWER CONTROL UNIT LINKAGE.........1108

OIL FILTER HOUSING.........1117

OIL PAN.........1119

PUMP (AXIAL PISTON; VARIABLE DISPLACEMENT).........1124

CHARGE PUMP (FIXED DISPLACEMENT).........1143

PUMP DRIVE.........1149

PUMP HEAD.........1155

STEER LEVER CONTROL ASSEMBLY.........1160

TRANSMISSION.........1164

CHARGE AND MAIN RELIEF VALVES.........1175

CHARGE PRESSURE RELIEF VALVE.........1182

OIL COOLER BYPASS VALVE.........1184

PILOT-OVERSPEED VALVE.........1186

SERVO VALVES.........1191

SYNCH VALVE.........1195

SYNCH SHUTOFF VALVE.........1200

MAIN CONTROL VALVE.........1202

UNDERSPEED VALVE.........1213

UNDERSPEED OVERRIDE VALVE.........1226

TWO SPEED MOTOR CONTROL VALVE.........1230

PUMP (TRACK BRAKE RELEASE).........1232

TRACK BRAKES.........1238

TRACK MOTORS.........1246

EQUALIZER BAR AND PADS.........1281

EQUALIZER BAR SUPPORTS.........1288

FRONT IDLERS AND YOKES; SPROCKET SEGMENTS.........1295

FRONT IDLERS AND YOKES.........1297

TRACKS.........1307

ADJUSTMENT OF TRACKS.........1312

TRACK ADJUSTERS AND RECOIL SPRINGS.........1315

TRACK ADJUSTERS.........1320

PIVOT SHAFTS.........1324

TRACK CARRIER ROLLERS.........1330

TRACK ROLLERS.........1337

TRACK ROLLER FRAMES.........1342

BLOWER FANS AND MOTORS.........1347

COMPRESSOR.........1350

COMPRESSOR CLUTCH AND PULLEY.........1353

COMPRESSOR COIL.........1361

COMPRESSOR SHAFT SEAL.........1364

CONDENSER COIL.........1368

CONDENSER FANS AND MOTORS.........1371