Caterpillar 973 TRACK LOADERS & 973 RIPPERS Repair Service Manual
Complete service repair manual with Electrical Wiring Diagrams for Caterpillar 973 TRACK LOADERS & 973 RIPPERS, with all the technical information to maintain, diagnose, repair, and rebuild like professional mechanics.
Caterpillar 973 TRACK LOADERS & 973 RIPPERS workshop service repair manual includes:
* 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
EVAPORATOR COIL.........1373
EXPANSION VALVE.........1377
HEATER CONTROL VALVE.........1380
HEATER CORE.........1383
RECEIVER-DRIER.........1386
THERMOSTAT.........1389
BUCKET.........1393
BUCKET AND LEVER LINK.........1398
LIFT CYLINDERS.........1406
TILT CYLINDER.........1412
LIFT AND TILT CYLINDERS.........1416
HYDRAULIC TANK.........1424
LIFT ARMS.........1433
LIFT ARM BEARINGS.........1438
HYDRAULIC OIL COOLER.........1440
HYDRAULIC PUMP.........1442
PUMP (PILOT).........1457
COMBINER VALVE.........1463
MAIN CONTROL VALVE .........1470
PILOT CONTROL VALVE AND LINKAGE.........1479
CAB.........1493
CAB DOOR LATCHES AND STRIKERS.........1499
CAB TILT CYLINDER.........1503
CAB .........1505
SLIDING WINDOW GLASS.........1519
STATIONARY WINDOW GLASS.........1527
WINDSHIELD WIPER MOTOR AND LINKAGE (FRONT).........1530
WINDSHIELD WIPER MOTOR AND LINKAGES (REAR).........1533
STARTER.........1538
ALTERNATOR.........1540
BATTERIES.........1542
SENR2465 - Testing and Adjusting (973 CHECKS; TESTS & ADJUSTMENT CHART).........1544
SENR3193 - Systems Operation (943, 953, 963, 973 TRACK-TYPE LOADERS POWER TRAIN).........1552
SENR3193 - Testing And Adjusting (943, 953, 963, 973 TRACK-TYPE LOADERS POWER TRAIN).........1645
SENR3643 - Schematic (963 & 973 Track-Type Loaders Hydraulic System).........1709
Collage.........1710
Main.........1730
SENR4736 - Specifications (973 TRACK-TYPE LOADER POWER TRAIN).........1732
Introduction SMCS - 5063.........1733
Hydraulic Pump SMCS - 5063.........1734
Speed Control Valve SMCS - 5063.........1737
Main Control Valve SMCS - 5063.........1739
Track Motors SMCS - 5063.........1741
Pilot-Overspeed Valve SMCS - 5063.........1745
Joint Assembly SMCS - 5063.........1746
Governor Control Group SMCS - 5063.........1747
Steering Control Group SMCS - 5063.........1749
Speed And Direction Control Group SMCS - 5063.........1752
Speed Override And Brake Control Group SMCS - 5063.........1754
Hydrostatic Transmission Case Group SMCS - 5063.........1756
Track Brakes SMCS - 5063.........1762
Servo Linkage Group SMCS - 5063.........1764
Linkage Group-Transmission SMCS - 5063.........1766
Charge Pressure Relief & Cooler By Pass Valves SMCS - 5063.........1767
Underspeed Override Valve SMCS - 5063.........1768
Charge And Relief Valve SMCS - 5063.........1769
Servo Cylinder Groups SMCS - 5063.........1773
Underspeed Valve SMCS - 5063.........1774
Final Drive Group SMCS - 5063.........1776
Track SMCS - 5063.........1779
Front Idler Groups SMCS - 5063.........1780
Pivot Bar Group SMCS - 5063.........1783
Track Adjustment SMCS - 5063.........1784
Track Carrier Rollers SMCS - 5063.........1786
Track Rollers SMCS - 5063.........1787
SENR4737 - Specifications (973 TRACK-TYPE LOADER HYDRAULIC SYSTEMS).........1789
Introduction SMCS - 5063.........1790
Hydraulic Pump For Pilot Oil System SMCS - 5063.........1791
Hydraulic Pump For Main Oil System SMCS - 5063.........1793
Filter And Tank Group SMCS - 5063.........1796
Lift And Tilt Pilot Valve SMCS - 5063.........1798
Attachment Pilot Valve SMCS - 5063.........1801
Control Valves For Lift And Tilt And Attachment SMCS - 5063.........1803
Combiner Valve SMCS - 5063.........1807
Wear Plates; Bit And Cutting Edge Groups And Tooth Groups SMCS - 5063.........1809
Main Relief Valve For Large Section Of Main Hydraulic Pump SMCS - 5063.........1810
Relief Valve For Small Section Of Main Hydraulic Pump SMCS - 5063.........1812
Relief Valve For Head End Of Lift Cylinders SMCS - 5063.........1813
Relief Valve For Pilot Pump SMCS - 5063.........1814
Relief Valves SMCS - 5063.........1815
Diverter Valve And Control Group SMCS - 5063.........1816
Two-Lever (Lift And Tilt) Control Group SMCS - 5063.........1818
Three-Lever (Attachment) Control Group SMCS - 5063.........1820
Single (Lift And Tilt) Control Group SMCS - 5063.........1821
Two-Lever (Attachment) Control Group SMCS - 5063.........1823
Bucket Control Group SMCS - 5063.........1825
Lift Kickout Adjustment Procedure SMCS - 5063.........1828
Bucket Positioner Adjustment Procedure SMCS - 5063.........1830
Lift Cylinders SMCS - 5063.........1831
Tilt Cylinder SMCS - 5063.........1832
Multi-Purpose Bucket Cylinders SMCS - 5063.........1833
Ripper Cylinders SMCS - 5063.........1834
Ripper Cylinder Mounting Group SMCS - 5063.........1835
Ripper Mounting Group SMCS - 5063.........1836
SENR5202 - Disassembly and Assembly (SUPPLEMENT FOR 943; 953; 963; 973 TRACK TYPE LOADER UNDERCAR.).........1838
Duo-Cone Seals.........1839
Track Carrier Rollers.........1846
Sprocket Segments.........1859
Track Rollers.........1861
Front Idlers & Yokes.........1870
Adjustment Of Tracks.........1874
Tracks.........1881
Track Roller Frames.........1889
Track Adjusters.........1900
Track Recoil Springs.........1904
Equalizer Bar & Pads.........1908
Pivot Shafts.........1912
SENR5363 - Disassembly and Assembly SUPPLEMENT (for 973 TRACK-TYPE LOADER - 3306 ENGINE).........1914
Introduction SMCS - 7305-012; 7305-011.........1915
Alternator SMCS - 1405-010.........1916
Starter SMCS - 1453-011; 1453-012.........1918
Batteries & Battery Boxes SMCS - 1401; 7257-010.........1920
Muffler & Hood SMCS - 1062; 7251-010.........1923
Fan SMCS - 1356-010.........1927
Radiator & Transmission Oil Cooler SMCS - 1353; 1375-010; 1375-076; 1375-077.........1931
Radiator & Guard Assembly SMCS - 1381-010.........1938
Engine SMCS - 1000-010.........1945
SENR5364 - Specifications (973 Track-Type Loader).........1957
Speed and Direction Control.........1958
Speed Control Valve.........1960
Transmission Control Valve.........1962
Servo Cylinder.........1964
Charge and Relief Valve.........1966
Actuator (Underspeed) Valve.........1970
Charge Pressure Relief Valve.........1972
Oil Cooler Bypass Valve.........1973
Underspeed Override Valve.........1974
Transmission Control Linkage.........1975
Servo Linkage.........1977
Hydrostatic Drive Motor.........1979
Hydrostatic Case.........1984
Parking Brake.........1991
Final Drive.........1993
Front Idler and Recoil Spring.........1996
Track.........1999
Track Adjustment.........2002
Track Carrier Rollers.........2005
Track Rollers.........2007
Pivot Bar.........2009
SENR5365 - Systems Operation (973 Track-Type Loader Power Train).........2010
Glossary of TermsSMCS - 3030.........2011
UndercarriageSMCS - 4150.........2015
Final DriveSMCS - 4050.........2029
System SchematicsSMCS - 3000.........2031
SENR5365 - Testing and Adjusting (973 Track-Type Loader Power Train).........2061
Power TrainSMCS - 3030.........2062
Systems CheckSMCS - 3030.........2090
TroubleshootingSMCS - 3030.........2104
Underspeed Valve and Overspeed Valve AdjustmentSMCS - 3216.........2114
Hydrostatic Transmission Linkage AdjustmentSMCS - 3030.........2123
External Linkage AdjustmentsSMCS - 3030.........2140
Backup Alarm AdjustmentSMCS - 7406.........2157
SENR5367 - Disassembly and Assembly (973 Track-Type Loader Power Train).........2158
Duo-Cone Conventional Seals - Install.........2162
Sprocket Segment - Remove and Install.........2174
Track Carrier Roller - Remove.........2176
Track Carrier Roller - Disassemble.........2180
Track Carrier Roller - Assemble.........2185
Track Carrier Roller - Install.........2190
Track Roller - Remove.........2192
Track Roller - Disassemble.........2195
Track Roller - Assemble.........2198
Track Roller - Install.........2204
Track - Separate.........2206
Track - Disassemble.........2210
Track - Assemble.........2216
Track - Connect.........2226
Track - Adjust.........2229
Front Idler and Yoke - Remove.........2231
Front Idler and Yoke - Disassemble.........2232
Front Idler and Yoke - Assemble.........2239
Front Idler and Yoke - Install.........2247
Track Adjuster - Remove.........2249
Track Adjuster - Disassemble.........2251
Track Adjuster - Assemble.........2254
Track Adjuster - Install.........2257
Recoil Spring - Remove and Install.........2258
Track Roller Frame - Remove.........2262
Track Roller Frame - Install.........2267
Pivot Shaft - Remove and Install.........2269
Final Drive and Sprocket - Remove.........2271
Final Drive and Sprocket - Disassemble.........2274
Final Drive and Sprocket - Assemble.........2287
Final Drive and Sprocket - Install.........2301
Equalizer Bar - Remove and Install.........2304
Track Brake - Remove.........2308
Track Brake - Disassemble.........2310
Track Brake - Assemble.........2313
Track Brake - Install.........2316
Track Drive Motor - Remove.........2318
Track Drive Motor - Disassemble.........2322
Track Drive Motor - Assemble.........2343
Track Drive Motor - Install.........2368
Forward-Reverse Controls - Disassemble.........2372
Forward-Reverse Controls - Assemble.........2383
Steering Control - Disassemble.........2392
Steering Control - Assemble.........2397
Speed-Brake Control - Remove.........2404
Speed-Brake Control - Disassemble.........2406
Speed-Brake Control - Assemble.........2410
Speed-Brake Control - Install.........2414
Hydrostatic Power Control Unit - Remove.........2416
Hydrostatic Power Control Unit - Install.........2424
Pump Drive - Disassemble.........2431
Pump Drive - Assemble.........2435
Flexible Coupling - Remove and Install.........2441
Oil Filter Housing - Remove and Install.........2444
Hydraulic Drive Pump - Remove.........2446
Hydraulic Drive Pump - Disassemble.........2451
Hydraulic Drive Pump - Assemble.........2460
Hydraulic Drive Pump - Install.........2473
Charge Pump - Remove.........2476
Charge Pump - Disassemble.........2477
Charge Pump - Assemble.........2480
Charge Pump - Install.........2483
Synchronizing Shutoff Valve - Remove.........2484
Synchronizing Shutoff Valve - Disassemble.........2485
Synchronizing Shutoff Valve - Assemble.........2486
Synchronizing Shutoff Valve - Install.........2487
Synchronizing Valve - Remove.........2488
Synchronizing Valve - Disassemble.........2489
Synchronizing Valve - Assemble.........2492
Synchronizing Valve - Install.........2496
Charge Pressure Relief Valve - Remove and Install.........2497
Oil Cooler Bypass Valve - Remove.........2500
Oil Cooler Bypass Valve - Disassemble.........2501
Oil Cooler Bypass Valve - Assemble.........2502
Oil Cooler Bypass Valve - Install.........2503
Charge and Main Relief Valves - Remove.........2504
Charge and Main Relief Valves - Disassemble.........2506
Charge and Main Relief Valves - Assemble.........2508
Charge and Main Relief Valves - Install.........2510
Pump Head - Remove and Install.........2513
Pump Head and Barrel - Remove.........2520
Pump Head and Barrel - Install.........2525
Servo Cylinder - Remove.........2529
Servo Cylinder - Disassemble.........2532
Servo Cylinder - Assemble.........2535
Servo Cylinder - Install.........2539
Main Control Valve - Remove.........2542
Main Control Valve - Disassemble.........2545
Main Control Valve - Assemble.........2551
Main Control Valve - Install.........2558
Steer Lever Control - Disassemble.........2560
Steer Lever Control - Assemble.........2563
Pilot Overspeed Valve - Remove.........2566
Pilot Overspeed Valve - Disassemble.........2568
Pilot Overspeed Valve - Assemble.........2570
Pilot Overspeed Valve - Install.........2572
Underspeed Override Valve - Remove.........2574
Underspeed Override Valve - Disassemble.........2576
Underspeed Override Valve - Assemble.........2578
Underspeed Override Valve - Install.........2580
Underspeed Valve - Remove.........2582
Underspeed Valve - Disassemble.........2587
Underspeed Valve - Assemble.........2593
Underspeed Valve - Install.........2600
Two Speed Motor Control Valve - Remove.........2604
Two Speed Motor Control Valve - Disassemble.........2605
Two Speed Motor Control Valve - Assemble.........2606
Two Speed Motor Control Valve - Install.........2608
Hydrostatic Power Control Unit Linkage (Internal) - Remove.........2609
Hydrostatic Power Control Unit Linkage (Internal) - Disassemble.........2611
Hydrostatic Power Control Unit Linkage (Internal) - Assemble.........2617
Hydrostatic Power Control Unit Linkage (Internal) - Install.........2622
Servo Valve - Remove and Install.........2625
Servo Valve Joint - Remove.........2631
Servo Valve Joint - Install.........2636
Oil Pan - Remove.........2640
Oil Pan - Disassemble.........2642
Oil Pan - Assemble.........2644
Oil Pan - Install.........2646
SENR5368 - Specifications (973 Track-Type Loader Hydraulic System).........2648
Hydraulic Tank and Filter.........2649
Hydraulic Pump.........2651
Lift and Tilt Control Valve.........2655
Attachment Control Valve.........2658
Relief Valve For Attachment Cylinders.........2661
Main Relief Valve.........2663
Pilot Valve.........2665
Lift Cylinder.........2686
Relief Valve for Head End of Tilt and Lift Cylinders.........2687
Tilt Cylinder.........2689
Relief Valve for Rod End of Tilt Cylinder.........2690
Multi-Purpose Bucket Cylinder.........2693
Ripper Cylinder.........2694
Ripper Cylinder Mounting Group.........2695
Bucket Control Group.........2697
SENR5369 - Systems Operation (973 Track-Type Loader Hydraulic System).........2702
General InformationSMCS - 5050.........2703
Hydraulic Tank and FilterSMCS - 5056; 5068.........2708
Lift and Tilt Pilot Control ValveSMCS - 5059; 5125; 5126.........2710
Lift and Tilt Control ValveSMCS - 5123; 5136.........2745
Attachment Control ValveSMCS - 5054.........2759
Relief Valve (Main)SMCS - 5051.........2764
Shuttle ValveSMCS - 5079.........2766
Oil Cooler and Bypass ValveSMCS - 5071.........2768
Diverter ValveSMCS - 5066.........2770
Bucket ControlSMCS - 5109; 5112; 6107.........2772
Tilt CircuitSMCS - 6540.........2779
Lift CircuitSMCS - 5100.........2788
Attachment CircuitSMCS - 6000.........2797
SENR5369 - Testing and Adjusting (973 Track-Type Loader Hydraulic System).........2806
SENR5371 - Disassembly and Assembly (973 TRACK-TYPE LOADER MACHINE SYSTEMS).........2831
Heater Control Valve SMCS - 7337-011; 7337-012.........2833
Heater Core SMCS - 7304-011; 7304-012.........2836
Blower Fans & Motors SMCS - 1636-011; 1636-012.........2839
Air Conditioner Compressor SMCS - 1357-010.........2842
Compressor Clutch & Pulley SMCS - 1357-010.........2844
Compressor Coil SMCS - 1357-010.........2851
Compressor Shaft Seal SMCS - 1357-010.........2854
Thermostat SMCS - 1355-010.........2858
Air Conditioning Evaporator Coil SMCS - 1808-010.........2860
Condenser Fans & Motors SMCS - 1636-010.........2863
Air Conditioning Condenser Coil SMCS - 1805-010.........2864
Receiver-Dryer SMCS - 7322-010.........2866
Bucket SMCS - 6101-011; 6101-012.........2868
Bucket Lever & Link SMCS - 6107-011; 6107-012; 6107-015; 6107-016.........2873
Bucket Positioner SMCS - 5112-010.........2881
Lift Cylinders SMCS - 5102-011; 5102-012.........2884
Tilt Cylinder SMCS - 5104-012; 5104-011.........2889
Lift & Tilt Cylinders SMCS - 5102; 5104-015; 5104-16.........2893
Hydraulic Tank SMCS - 5076-012; 5076-015; 5076-016; 5076-011.........2901
Lift Arms SMCS - 6119-011; 6119-012.........2910
Lift Arm Bearings SMCS - 6119-010.........2915
Hydraulic Oil Cooler SMCS - 1374-010.........2917
Hydraulic Oil Pump SMCS - 5055-016; 5055-010; 5055-015.........2919
Pilot Pump SMCS - 5073-016; 5073-010; 5073-015.........2930
Main Control Valve SMCS - 3111-016; 3111-010; 3111-015.........2935
Pilot Control Valve & Linkage SMCS - 5059; 5063-010; 5063-015; 5063-016.........2950
Seat SMCS - 1103-010.........2968
Cab SMCS - 7325-010.........2969
Cab Tilt Cylinder SMCS - 7301-011; 7301-010; 7341-011; 7341-012.........2975
Windshield Wiper Motor & Linkage (Front) SMCS - 7305-012; 7305-011.........2986
SENR5372 - Schematic (973 Track-Type Loader Electrical System).........2989
Collage.........2990
Main.........3020
Caterpillar 973 TRACK LOADERS & 973 RIPPERS Repair Service Manual
