TM2288 - Repair, Test & Adjustments Technical Manual for John Deere Model 2520 Series Compact Utility Tractors
Catalog:
Model:
Complete all inclusive technical manual with electrical wiring diagrams for John Deere Compact Utility Tractors 2520 Series, with all the technical information to maintain, diagnose, repair, and rebuild like professional mechanics.
John Deere Compact Utility Tractors 2520 Series workshop diagnosis operation test 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.
TM2288 English - Compact Utility Tractor 2520 Series Technical Manual.pdf
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omlvu24591 Spanish - 60 Gallon Sprayer (NA)
omlvu26091 English - Compact Utility Tractors 2520 (EU) Operator's Manual
omlvu26096 Danish - Compact Utility Tractors 2520 (EU)
omlvu26097 Dutch - Compact Utility Tractors 2520 (EU)
omlvu26098 Norwegian - Compact Utility Tractors 2520 (EU)
omlvu26100 Finnish - Compact Utility Tractors 2520 (EU)
omlvu26288 Croatian - Compact Utility Tractors 2520 (EU)
omlvu26290 Croatian - Compact Utility Tractors 2520 (EU)
omlvu26291 Latvian-lettish - Compact Utility Tractors 2520 (EU)
omlvu26293 Romanian - Compact Utility Tractors 2520 (EU)
omlvu26295 Slovenian - Compact Utility Tractors 2520 (EU)
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Total Pages: 1,323 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable, high quality)
Language: English
MAIN SECTIONS
Foreword
Safety
Safety
Specifications and Information
General Specifications
Fuel and Lubricants
Serial Number Locations
Engine
Specifications
Theory of Operation
Component Location
Diagnostics
Tests and Adjustments
Repair
Electrical
General Information
Specifications
Component Location
System Schematics
Operation and Diagnostics
Tests and Adjustments
Export Electrical
Specifications
Component Location
Schematics & Harnesses
Operation & Diagnostics
Power Train - Hydrostatic
Specifications
Component Location
Diagnostics
Theory of Operation
Tests and Adjustments
Repair
Hydraulics
Specifications
Component Locations
Schematics
Operation and Diagnostics
Troubleshooting
Theory of Operation
Tests and Adjustments
Repair
Steering
Specifications
Component Location
Theory of Operation
Diagnostics
Tests and Adjustments
Repair
Brakes
Specifications
Component Location
Theory of Operation
Diagnostics
Tests and Adjustments
Repair
Miscellaneous
Specifications
Repair
TABLE OF CONTENTS
Section 10: Safety................19
Group 05: Safety................19
Recognize Safety Information................21
Understand Signal Words................22
Replace Safety Signs................23
Handle Fluids Safely—Avoid Fires................24
Prepare for Emergencies................25
Prevent Battery Explosions................26
Prevent Acid Burns................27
Wear Protective Clothing................29
Avoid High-Pressure Fluids................30
Avoid Heating Near Pressurized Fluid Lines................31
Service Machines Safely................32
Use Proper Tools................33
Park Machine Safely................34
Support Machine Properly................35
Use Proper Lifting Equipment................36
Work in Clean Area................37
Protect Against High Pressure Spray................38
Illuminate Work Area Safely................39
Work In Ventilated Area................40
Remove Paint Before Welding or Heating................41
Avoid Harmful Asbestos Dust................42
Service Tires Safely................43
Stay Clear of Rotating Drivelines................44
Service Cooling System Safely................46
Dispose of Waste Properly................47
Handle Chemical Products Safely................48
Live With Safety................49
Section 20: Specifications and Information................50
Group 05: General Specifications................1350
Metric Bolt and Screw Torque Values................53
Unified Inch Bolt and Screw Torque Values................55
Metric Cap Screw Torque Values—Grade 7................57
Gasket Sealant Application................58
Service Recommendations For Flat Face O-Ring Seal Fittings................59
Service Recommendations for O-Ring Boss Fittings................61
Group 10: Fuel and Lubricants................50
Diesel Fuel................65
Handling and Storing Diesel Fuel................67
Diesel Engine Oil................68
Diesel Engine Break-In Oil................69
Alternative and Synthetic Lubricants................70
Lubricant Storage................71
Mixing of Lubricants................72
Grease................73
Transmission and Hydraulic Oil................74
Heavy Duty Diesel Engine Coolant................75
Group 15: Serial Number Locations................50
Serial Numbers................77
Machine Product Identification Number................78
Engine Serial Number................79
Section 30: Engine................80
Group 05: Specifications................80
General Specifications................1350
Repair Specifications................1149
Tests and Adjustment Specifications................87
Operational Tests................88
Torque Values, Non-Standard Fasteners................89
Service Equipment and Tools................1305
Other Materials................901
Group 10: Theory of Operation................80
Cooling System Operation................96
Lubrication System Operation................98
Group 15: Component Location................80
Fuel System Component Location................102
Diesel Engine Component Location (S.N. —040000)................104
Diesel Engine Component Location (S.N. 040001— )................106
Group 20: Diagnostics................80
Starting Problems................111
Low Engine Output................114
Exhaust Abnormal Under Load................117
Engine Runs Rough................119
Excessive Fuel Consumption................121
Lubricating Oil................122
Temperature Problems................124
Low Compression................125
Diagnostic Table................126
Group 25: Tests and Adjustments................80
Throttle Cable Adjustment................129
Cylinder Compression Test................130
Slow Idle Adjustment................132
Valve Clearance Adjustment................134
Valve Lift Check................138
Fuel Injection Nozzle Test................139
Injection Pump Timing................142
Thermostat Test................153
Water Pump/Alternator Drive Belt Adjustment................155
Radiator Bubble Test................156
Cooling System Pressure Test................157
Radiator Pressure Cap Test................158
Engine Oil Pressure Test................159
Fuel Supply Pump Pressure Test................161
Fuel System Leakage Test................163
Bleed Fuel System................164
Group 30: Repair................81
Glow Plug Removal and Installation................167
Rocker Cover Removal and Installation................169
Rocker Arm Assembly................172
Engine Removal and Installation................176
Engine Removal From Tunnel (Front Subframe Removed)................182
Engine and Subframe Removal From Tunnel Section (Front Split)................187
Cylinder Head Removal and Installation (Engine In Place)................194
Cylinder Head and Valves Removal and Installation (Engine Out)................200
Cylinder Head and Valves Disassembly and Assembly................203
Valve Seats................205
Grind Valve Seats................208
Lap Valves................210
Valve Recession................211
Valve Guides................212
Valve Springs................214
Exhaust Manifold................216
Intake Manifold................217
Measure Piston-To-Cylinder Head Clearance................218
Piston and Connecting Rod................219
Piston Inspection................227
Cylinder Bore................234
Crankshaft Rear Oil Seal................238
Crankshaft Front Oil Seal................240
Crankshaft End Play Check................242
Crankshaft and Main Bearings................244
Crankshaft Main Bearing Clearance Check................250
Connecting Rod Side Play Check................252
Connecting Rod Bearing Clearance Check................254
Camshaft End Play Check................256
Camshaft................257
Camshaft Followers................264
Timing Gear Cover (3TNV82A-MJK, -MJKE)................266
Timing Gear Cover (3TNV82A-BMJK)................269
Timing Gear Backlash Check................271
Idler Gear................272
Timing Gear Cover Mounting Plate................274
Oil Pan and Strainer................275
Oil Pump (3TNV82A-MJK, -MJKE)................276
Oil Pump (3TNV82A-BMJK)................281
Thermostat and Water Pump................286
Fuel Filter/Water Separator................288
Secondary Fuel Filter................289
Fuel Injection Pump................290
Fuel Injection Nozzles................300
Starting Motor Removal and Installation................307
Starting Motor Disassembly and Assembly................308
Starting Motor Inspection/Test................312
Starting Motor Gear Train................316
Starting Motor Solenoid................320
20 Amp Alternator................82
High Capacity Alternator................328
Section 40: Electrical................339
Group 05: General Information................339
Reading Electrical Schematics................345
Theory Of Operation Information................347
Diagnostic Information................348
Wire Color Abbreviation Chart................349
Common Circuit Tests................351
Conductors For 12 Volt Circuits................353
Group 10: Specifications................339
System Specifications................727
Service Equipment and Tools................1305
Other Materials................901
Group 15: Component Location................339
Electrical Components (SN —406000)................361
Electrical Component Location (SN 406001— )................363
Group 20: System Schematics................339
Schematic and Wiring Harness Legend (SN —406000)................367
Schematic and Wiring Harness Legend (SN 406001— )................369
Electrical Schematic (SN —406000)................371
Electrical Schematic (SN 406001— )................377
W1 Main Wiring Harness (SN —406000)................383
W1 Main Wiring Harness (SN 406001— )................388
W2 Power Supply Wiring Harness (SN —406000)................393
W2 Power Supply Wiring Harness (SN 406001— )................394
W3 Battery Cable Wiring Harness................774
W4 Engine Wiring Harness................776
Y2 Fuel Shutoff Solenoid................777
W1 Main Wiring Harness Color Codes (SN —406000)................398
W1 Main Wiring Harness Color Codes (SN 406001— )................402
W2 Power Supply Wiring Harness Color Codes................773
W3 Battery Cable Wiring Harness Color Codes................775
Group 25: Operation and Diagnostics................339
Power Circuit Operation (SN —406000)................410
Power Circuit Electrical Schematic (SN —406000)................412
Power Circuit Diagnosis (SN —406000)................416
Power Circuit Operation (SN 406001— )................429
Power Circuit Electrical Schematic (SN 406001— )................431
Power Circuit Diagnosis (SN 406001— )................435
Cranking Circuit Operation (SN —406000)................448
Cranking Circuit Electrical Schematic (SN —406000)................449
Cranking Circuit Diagnosis (SN —406000)................451
Cranking Circuit Operation (SN 406001— )................456
Cranking Circuit Electrical Schematic (SN 406001— )................457
Cranking Circuit Diagnosis (SN 406001— )................459
Engine Preheater Circuit Operation (SN —406000)................465
Engine Preheater Circuit Electrical Schematic (SN —406000)................466
Engine Preheater Circuit Diagnosis (SN —406000)................468
Engine Glow Plug Circuit Operation (SN 406001— )................473
Engine Glow Plug Circuit Electrical Schematic (SN 406001— )................474
Engine Glow Plug Circuit Diagnosis (SN 406001— )................476
Fuel Supply Operation (SN —406000)................481
Fuel Supply Electrical Schematic (SN —406000)................483
Fuel Supply Diagnosis (SN —406000)................485
Fuel Supply Operation (SN 406001— )................496
Fuel Supply Electrical Schematic (Pull In - On Seat, PTO On) (SN 406001— )................498
Fuel Supply Electrical Schematic (Hold In - Off Seat, PTO Off) (SN 406001— )................501
Fuel Supply Diagnosis (SN 460001— )................504
Engine Shutoff Circuit Operation (SN —406000)................519
Engine Shutoff Circuit Operation (SN 406001— )................521
Engine Shutoff Electrical Schematic (SN —406000)................523
Engine Shutoff Electrical Schematic (SN 406001— )................525
Engine Shutoff Circuit Diagnosis All Models................528
Charging Circuit Operation (SN —406000)................530
Charging Circuit Electrical Schematic (SN —406000)................532
Charging Circuit Diagnosis (SN —406000)................534
Charging Circuit Operation (SN 406001— )................542
Charging Circuit Electrical Schematic (SN 406001— )................543
Charging Circuit Diagnosis (SN 406001— )................545
PTO Circuit Operation (SN —406000)................548
PTO Circuit Electrical Schematic (SN —406000)................550
PTO Circuit Diagnosis (SN —406000)................552
PTO Circuit Operation (SN 406001— )................557
PTO Circuit Electrical Schematic (SN 406001— )................559
PTO Circuit Diagnosis (SN 406001— )................561
Control Panel Circuit Operation (SN —406000)................566
Control Panel Circuit Electrical Schematic (SN —406000)................568
Control Panel Circuit Diagnosis (SN —406000)................570
Control Panel Circuit Operation (SN 406001— )................577
Control Panel Circuit Electrical Schematic (SN 406001— )................579
Control Panel Circuit Diagnosis (SN 406001— )................583
Light Switch Circuit Operation (SN —406000)................590
Light Switch Circuit Electrical Schematic (SN —406000)................592
Light Switch Circuit Diagnosis (SN —406000)................594
Light Switch Circuit Operation (SN 406001— )................610
Light Switch Circuit Electrical Schematic (SN 406001— )................612
Light Switch Circuit Diagnosis (SN 406001— )................614
Turn Signal Circuit Operation................630
Turn Signal Circuit Electrical Schematic (SN —406000)................631
Turn Signal Circuit Diagnosis (SN —406000)................633
Turn Signal Circuit Electrical Schematic (SN 406001— )................641
Turn Signal Circuit Diagnosis (SN 406001— )................643
Group 30: Tests and Adjustments................341
Ground Circuit Test................652
Battery Voltage and Specific Gravity Test................653
Battery—Charge................656
Battery—Load Test................658
Unregulated Voltage Output Test (SN —406000)................659
Stator Resistance Test (SN —406000)................661
Unregulated Amperage Test—55 Amp................663
Regulated Amperage and Voltage Test................665
Regulator/Rectifier Test (SN —406000)................668
Starting Motor Solenoid Test................670
No-Load Amperage Draw and RPM Test................672
Starting Motor Amperage Draw Test................674
Engine Coolant Temperature Sensor Test................676
Engine Oil Pressure Switch Test................678
Manifold Heater Test................680
Glow Plug Test................681
Diode Test................683
Fuse Test................686
Control Panel Light Test................687
Light Switch Test................688
Fuel Pull-In Relay Test................690
Relay Test (SN —406000)................692
Relay Test (SN 406001— )................694
Engine Preheater/Glow Plug Relay Test................696
Key Switch Test................698
Seat Switch Test................700
Transmission Neutral Switch Test................702
Turn Signal Switch Test................704
Position Lights Switch Test................706
Hazard Lights Switch Test................708
Rear PTO Switch Test................712
PTO Switch Test................712
Fuel Shutoff Solenoid Test................714
Fuel Gauge Sensor Test................716
PTO Solenoid Test................718
Parking Brake Switch Test and Adjustment................720
Brake Switch Test................722
Section 45: Export Electrical................724
Group 05: Specifications................724
System Specifications................727
Service Equipment and Tools................1305
Other Materials................901
Group 10: Component Location................724
Electrical Components................732
Group 15: Schematics & Harnesses................724
Schematic and Wiring Harness Legend................736
Electrical Schematic (SN —486000)................738
W1 Main Wiring Harness (SN —486000)................745
W1 Main Wiring Harness Color Codes (SN —486000)................750
Electrical Schematic (SN 486001— )................755
W1 Main Wiring Harness (SN 486001— )................762
W1 Main Wiring Harness Color Codes (SN 486001— )................767
W2 Power Supply Wiring Harness................772
W2 Power Supply Wiring Harness Color Codes................773
W3 Battery Cable Wiring Harness................774
W3 Battery Cable Wiring Harness Color Codes................775
W4 Engine Wiring Harness................776
Y2 Fuel Shutoff Solenoid................777
Group 20: Operation & Diagnostics................724
Power Circuit Operation................780
Power Circuit Electrical Schematic................782
Power Circuit Diagnosis................786
Cranking Circuit Operation................808
Cranking Circuit Electrical Schematic................809
Cranking Circuit Diagnosis................811
Engine Preheater Circuit Operation................817
Engine Preheater Circuit Electrical Schematic................818
Engine Preheater Circuit Diagnosis................820
Fuel Supply Operation................825
Fuel Supply Electrical Schematic................827
Fuel Supply Diagnosis................831
Engine Shutoff Circuit Operation................842
Engine Shutoff Electrical Schematic................844
Engine Shutoff Circuit Diagnosis................848
Charging Circuit Operation................850
Charging Circuit Electrical Schematic................851
Charging Circuit Diagnosis................853
PTO Circuit Operation................857
PTO Circuit Electrical Schematic................859
PTO Circuit Diagnosis................861
Control Panel Circuit Operation................866
Control Panel Circuit Electrical Schematic................868
Control Panel Circuit Diagnosis................870
Marker, Head, and Brake Light Circuit Operation................878
Marker, Headlight, and Brake Light Circuit Electrical Schematic................880
Marker, Head, and Brake Light Circuit Diagnosis................882
Hazard Lights and Turn Signal Lights Circuit Operation................886
Hazard Lights and Turn Signal Lights Circuit Electrical Schematic................888
Hazard Lights and Turn Signal Lights Circuit Diagnosis................890
Section 50: Power Train - Hydrostatic................894
Group 05: Specifications................894
General Specifications................1350
Torque Specification................899
Service Equipment and Tools................1305
Other Materials................901
Group 10: Component Location................894
Hydrostatic Drive................903
Charge Pump Component Location................904
Hydrostatic Motor Component Location................906
Hydrostatic Pump Component Location................908
Center Case Component Location................910
Swash Plate Component Location................912
Valve Plate Component Location................914
Center Case Gears Component Location................916
Pinion Drive Component Location................918
Mid PTO Component Location................920
Differential Case Component Location................921
Reduction Shafts Component Location................923
Differential Carrier Component Location................924
PTO Clutch Shaft Component Location................926
Rear PTO Component Location................928
Differential Component Location - MFWD................930
Final Drive Component Location - MFWD................932
Group 15: Diagnostics................894
Hydrostatic Transmission................943
PTO System................938
Transaxle................940
Group 20: Theory of Operation................894
Transmission................943
Component Location - Hydrostatic Transmission................945
Hydrostatic Schematic................947
Charge Pump Theory of Operation................949
Valve Block Theory of Operation................951
PTO Clutch and Brake Control Valves Theory of Operation................953
PTO Clutch and Brake Theory of Operation................955
Power Transmission - Traction Drive................957
Power Transmission - Mid and Rear PTO................959
Group 25: Tests and Adjustments................895
Hydraulic Warm Up Procedure................1203
Charge Pump/Steering System Relief Pressure Test................1211
PTO Clutch Pressure Test................1212
PTO Lubrication Pressure Test................971
PTO Brake Test................973
Transmission Neutral Adjustment................974
MFWD-to-Frame Clearance Adjustment................977
Group 30: Repair................895
Hydrostatic Transmission Removal................985
Charge Pump Removal................992
Charge Pump Disassembly and Inspection................994
Charge Pump Assembly and Installation................998
Hydro Motor Removal, Disassembly, and Inspection................1001
Hydrostatic Motor Assembly and Installation................1009
Hydrostatic Pump Removal and Installation................1015
Valve Block Disassembly and Inspection................1020
Valve Block Assembly................1026
Cover Plate Removal and Installation................1030
Cover Plate Disassembly and Inspection................1032
Valve Plate Removal and Disassembly................1035
Valve Plate Assembly and Installation................1042
Differential Carrier Removal and Installation................1043
Differential Carrier Disassembly and Inspection................1048
Rear PTO Removal................1051
Rear PTO Installation................1055
Transmission Disassembly................1056
Transmission Assembly................1093
Mechanical Front Wheel Drive (MFWD) Removal................1122
Final Drive Cover Disassembly and Inspection - MFWD................1124
Final Drive Cover Assembly - MFWD................1128
Final Drive Housing Disassembly and Inspection - MFWD................1131
Final Drive Housing Assembly- MFWD................1133
Spindle Housing Disassembly and Inspection................1134
Spindle Housing Assembly................1136
Differential Input Housing Disassembly - MFWD................1137
Differential Input Housing Assembly - MFWD................1138
Differential Disassembly and Inspection - MFWD................1141
Differential Assembly - MFWD................1142
Section 60: Hydraulics................1144
Group 05: Specifications................1144
General Hydraulic Specifications................1147
Test and Adjustment Specifications................1148
Repair Specifications................1149
Torque Specifications................1351
Service Equipment and Tools................1305
Group 10: Component Locations................1144
Hydraulic System................1186
Rockshaft................1156
Rockshaft Control Valve Component Location................1158
Hydraulic Pump................1160
Selective Control Valve Linkage Component Location................1161
Selective Control Valve Component Location................1163
Group 15: Schematics................1144
Hydraulic Schematic................1167
Steering Schematic................1169
Rockshaft Hydraulic Schematic................1171
Group 20: Operation and Diagnostics................1144
Hydraulic System................1186
Hydraulics—SCV Operation................1179
Group 25: Troubleshooting................1144
Hydraulic System................1186
Group 30: Theory of Operation................1144
Hydraulics (Rockshaft)................1190
Draft Linkage................1191
System Pressure Relief................1193
Speed Control Valve—Neutral................1195
Rockshaft Control Valve—Raise................1197
Rockshaft Control Valve—Lower................1199
Rockshaft Control Valve—Neutral................1200
Group 35: Tests and Adjustments................1144
Hydraulic Warm Up Procedure................1203
Rockshaft Sensitivity Adjustment................1204
Lift Arm Adjustment................1206
Implement Pressure Relief Adjustment................1209
Charge Pump/Steering System Relief Pressure Test................1211
PTO Clutch Pressure Test................1212
Pump Flow Test................1213
Rockshaft Lift Cycle Test................1214
Rockshaft Leakage Test................1216
Group 40: Repair................1145
Hydraulic Pump Removal and Installation................1219
Hydraulic Pump Disassembly and Inspection................1220
Hydraulic Pump Assembly................1225
Screen Filter Removal and Replacement................1229
Selective Control Valve (SCV)................1231
Rockshaft Assembly Removal................1236
Lift Arms Removal and Installation................1240
Rockshaft Disassembly and Inspection................1242
Rockshaft Removal................1254
Rockshaft Control Valve Removal and Installation................1257
Rockshaft Control Valve Disassembly, Inspection, and Assembly................1260
Section 70: Steering................1270
Group 05: Specifications................1270
Steering Specifications................1272
Torque Specifications................1351
Service Equipment and Tools................1305
Group 10: Component Location................1270
Steering System Component Location................1276
Steering System Schematic................1277
Group 15: Theory of Operation................1270
Steering Operation................1280
Group 20: Diagnostics................1270
System: Steering Checks................1270
Symptom: Steering Problems................1270
Symptom: Steering Noisy or Vibrates................1270
Group 25: Tests and Adjustments................1270
Steering System Test................1290
Group 30: Repair................1270
Tie Rod Removal and Installation................1293
Steering Cylinder Removal and Installation................1295
Steering Wheel Removal and Installation................1375
Steering Control Unit (SCU) Removal and Installation................1298
Section 80: Brakes................1319
Group 05: Specifications................1301
Brake Specifications................1303
Torque Specifications................1351
Service Equipment and Tools................1305
Group 10: Component Location................1301
Brake Pedals and Linkage................1307
Brake Pedals and Linkage—Explode................1308
Brake Pedals and Linkage—Explode (Export)................1310
Park Brake Component Location................1312
Park Brake Component Location (Export)................1314
Brake Housing Component Location................1316
Group 15: Theory of Operation................1301
Brakes................1319
Group 20: Diagnostics................1301
System: Brake Checks................1301
Symptom: Brake Problems................1301
Symptom: Cruise Control Problems................1301
Group 25: Tests and Adjustments................1301
Brake Pedal Adjustment................1327
Park Brake Adjustment - Export................1329
Group 30: Repair................1301
Brake Disassembly and Inspection................1335
Brake Assembly................1339
Brake Pedal and Linkage Removal and Installation................1341
Park Brake Linkage................1344
Park Brake Linkage - Export................1345
Cruise Control Linkage................1347
Section 90: Miscellaneous................1348
Group 05: Specifications................1348
General Specifications................1350
Torque Specifications................1351
Group 10: Repair................1348
Seat and Seat Frame Removal and Installation................1355
Roll Over Protection System Removal and Installation................1358
Rear Fenders Removal and Installation................1360
Fender/ROPS Support Removal and Installation................1362
Foot Deck Removal and Installation................1364
Front Wheel Removal and Installation................1369
Rear Wheel Removal and Installation................1370
Battery Removal and Installation................1371
Hood Removal and Installation................1372
Muffler and Exhaust Pipe Removal and Installation................1373
Steering Wheel Removal and Installation................1375
Control Panel Removal and Installation................1377
Control Panel Lower Shroud Removal and Installation................1379
Fuel Tank Removal and Installation................1381
Three-Point Hitch Removal and Installation................1383
TM2288 - Repair, Test & Adjustments Technical Manual for John Deere Model 2520 Series Compact Utility Tractors