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Stabil-TRAK™ System and Boom Interlock System
10-40
6036, 6042, 8042, 10042, 10054
10.12 BOOM EXTEND SYSTEM
HYDRAULIC CIRCUIT OPERATION
AND TROUBLESHOOTING
The function of the boom extend interlock system varies
under different operating conditions. The basic modes
include the EXTEND INTERLOCK MODE and
OUTRIGGER INTERLOCK MODE.
Hydraulic operation and troubleshooting information
for each of these modes will be described on the
following pages.
10.12.1 Troubleshooting Symptom Chart
Symptom Conditions Reference
With both outriggers RAISED, the
boom will not extend.
Ignition ON, engine running
Both outriggers RAISED
Refer to 10.12.2Hydraulic Circuit Operation
- Extend Interlock Mode10-42 and 10.12.3
Hydraulic Troubleshooting - Extend
Interlock Mode10-42
With both outriggers lowered onto
firm terrain, the boom will not extend
to its full limits.
Ignition ON, engine running
Both outriggers lowered onto firm terrain
Refer to Section 10.12.4, “Hydraulic
Circuit Operation - Outrigger Interlock
Mode,” and Section 10.12.5, “Hydraulic
Troubleshooting - Outrigger
Interlock Mode.”
- Service Manual 1
- EFFECTIVITY PAGE 3
- READ THIS FIRST 4
- SECTION CONTENTS 5
- Section Subject Page 6
- Section 1 9
- Safety Practices 9
- 1.1 INTRODUCTION 10
- 1.2 DISCLAIMER 10
- 1.4 DO NOT OPERATE TAGS 10
- 1.5 SAFETY INFORMATION 10
- 1.6 SAFETY INSTRUCTIONS 11
- 1.7 SAFETY DECALS 12
- Section 2 13
- 2.1 REPLACEMENT PARTS AND 14
- WARRANTY INFORMATION 14
- 2.2 THREAD LOCKING COMPOUND 14
- 2.3 TORQUE CHARTS 15
- SOCKET HEAD CAP SCREWS 19
- 2.4 SPECIFICATIONS 26
- 2.4.3 Electrical System 27
- 8042, 10042 & 10054 27
- 2.4.5 Tires 28
- 2.5 FLUID SPECIFICATIONS 29
- 2.7 SERVICE AND 32
- MAINTENANCE SCHEDULES 32
- 2.7.3 500 & 1000 Hour 34
- 2.7.4 2000 Hour 35
- 2.8 LUBRICATION SCHEDULES 36
- 6042 ONLY 39
- 2.8.3 1000 Hour 41
- Section 3 43
- 3.1 BOOM SYSTEM COMPONENT 45
- 3.2 SAFETY INFORMATION 46
- (498 cm) 54
- 3.4.8 Boom Installation 56
- 3.5.1 Boom System Operation 57
- 3.6.7 Third Boom Installation 66
- BOOM EXTEND AND RETRACT 70
- 3.7.2 Inspection Guidelines 71
- 3.7.4 Chain Lubrication 73
- Replacement (10054) 82
- 3.8 QUICK ATTACH ASSEMBLY 90
- 3.9 BOOM WEAR PADS 90
- 3.10 FORKS 91
- 3.11 TROUBLESHOOTING 92
- Section 4 95
- 4.1 OPERATOR CAB AND COVERS 96
- 4.2 OPERATOR CAB 97
- 4.3 CAB COMPONENTS 97
- 4.3.2 Service Brake Pedal 98
- 4.3.3 Throttle Pedal 99
- Cab and Covers 100
- 4.3.4 Joystick Assemblies 100
- 4.4 CAB REMOVAL 102
- 4.5 CAB INSTALLATION 104
- Section 5 107
- COMPONENT TERMINOLOGY (6036) 108
- COMPONENT TERMINOLOGY (6042) 109
- COMPONENT TERMINOLOGY (8042) 110
- COMPONENT TERMINOLOGY 111
- (10042 & 10054) 111
- 5.5 GENERAL INFORMATION 112
- 5.6 AXLE ASSEMBLIES 112
- 5.6.4 Axle Maintenance 113
- 5.6.6 Axle Replacement 115
- (8042, 10042 & 10054) 115
- Problem Cause Remedy 119
- TO TRANSMISSION 122
- 5.9 WHEELS AND TIRES 123
- 5.10 BRAKES 124
- FRONT OF 125
- 6036 & 6042 125
- 8042, 10042 & 10054 126
- Section 6 127
- Transmission 127
- 6.1 TRANSMISSION ASSEMBLY 128
- AND MAINTENANCE INFORMATION 129
- 6.4 TRANSMISSION REPLACEMENT 129
- Replacement 132
- 6.5 TRANSMISSION 133
- TROUBLESHOOTING 133
- Section 7 137
- 7.1 INTRODUCTION 138
- 7.2 ENGINE SERIAL NUMBER 138
- 7.3 SPECIFICATIONS AND 138
- MAINTENANCE INFORMATION 138
- IF EQUIPPED FOR ULS 140
- IF EQUIPPED FOR LS 140
- 7.5 ENGINE ELECTRICAL SYSTEM 141
- 7.6 FUEL SYSTEM 141
- VIEW FROM REAR OF MACHINE 145
- 7.8 AIR CLEANER ASSEMBLY 147
- 7.9 ENGINE REPLACEMENT 148
- 7.9.2 Engine Installation 149
- 7.10 ISOLATION COUPLER 150
- Section 8 153
- Hydraulic System 153
- 8.1 HYDRAULIC COMPONENT 154
- TERMINOLOGY 154
- 8.2 SAFETY INFORMATION 156
- 8.4 HYDRAULIC CIRCUITS 157
- 8.4.2 Hydraulic Schematics 164
- 8.5 HYDRAULIC RESERVOIR 172
- 8.6 HYDRAULIC SYSTEM PUMP 173
- REXROTH PUMP 174
- SAUER PUMP 174
- EATON PUMP 174
- 8.7 VALVES AND MANIFOLDS 175
- 6036 6042 178
- 8042, 10042, 10054 179
- 8.8 HYDRAULIC CYLINDERS 183
- AFTER the head gland 185
- AXLE CENTER SECTION 186
- STEERING CYLINDER 186
- Section 9 189
- Electrical System 189
- 9.1 ELECTRICAL COMPONENT 190
- 9.2 SPECIFICATIONS 191
- 9.3 SAFETY INFORMATION 191
- 9.4 FUSES AND RELAYS 191
- HARNESS, DASH/THROTTLE 193
- HARNESS, WIRING, OUTRIGGERS 199
- BOOM EXTEND 200
- HARNESS, LOGIC 200
- HARNESS, CAB/PWR DISTRIBUTION 201
- HARNESS, ENGINE/CHASSIS 202
- 9.7.1 Alternator 205
- 9.8 WINDOW WIPER/WASHER 206
- WINDSHIELD WIPER MOTOR 206
- 9.8.2 Skylight Wiper Motor 207
- 9.9 CAB HEATER AND FAN 208
- 9.10 SOLENOIDS, SENSORS AND 209
- 9.10.5 Service Brake Switch 212
- 9.10.6 Boom Angle Sensor 213
- (10054 only) 214
- (10054 Only) 215
- 9.11.1 Instrument Cluster 215
- 9.12 DASH SWITCHES 216
- 9.12.2 Dash Switches 217
- 9.13 TROUBLESHOOTING 218
- Section 10 229
- 10.1 STABIL-TRAK™ SYSTEM 231
- 10.2 BOOM EXTEND INTERLOCK 232
- SYSTEM COMPONENT 232
- TERMINOLOGY (10054 ONLY) 232
- 10.4 STABIL-TRAK™ OPERATION 234
- (SN 13198 through 17984) 235
- 10.4.4 Relay Testing 236
- 10.5 BOOM EXTEND INTERLOCK 237
- SYSTEM DESCRIPTION 237
- 10.6 BOOM EXTEND INTERLOCK 238
- SYSTEM OPERATION (10054 ONLY) 238
- Instructions 239
- 10.7.2 Stabil-TRAK™ System 239
- Test Procedures 239
- Electrical Circuit 243
- FREE PIVOT Mode 243
- SLOW PIVOT Mode 244
- LOCKED MODE 245
- TROUBLESHOOTING (10054) 246
- Boom Extend Mode 1 248
- Boom Extend Mode 2 249
- Boom Extend Mode 3 250
- SYSTEM TEST 251
- 10.11 STABIL-TRAK™ HYDRAULIC 253
- CIRCUIT OPERATION AND 253
- Pressure 256
- Load Sense 256
- LOCKED MODE, Frame Level Left 266
- 10.12 BOOM EXTEND SYSTEM 268
- HYDRAULIC CIRCUIT OPERATION 268
- AND TROUBLESHOOTING 268
- Extend Interlock Mode 270
- Outrigger Interlock Mode 272
- JLG Worldwide Locations 276
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