Jlg 340AJ Service Manual User Manual Page 31
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SECTION 2 - GENERAL
3121259 – JLG Lift – 2-1
SECTION 2. GENERAL
2.1 MACHINE PREPARATION, INSPECTION, AND
MAINTENANCE
General
This section provides the necessary information needed by
those personnel that are responsible to place the machine in
operation readiness and maintain its safe operating condition.
For maximum service life and safe operation, ensure that all
the necessary inspections and maintenance have been com-
pleted before placing the machine into service.
Preparation, Inspection, and Maintenance
It is important to establish and conform to a comprehensive
inspection and preventive maintenance program. The follow-
ing table outlines the periodic machine inspections and main-
tenance recommended by JLG Industries, Inc. Consult your
national, regional, or local regulations for further requirements
for aerial work platforms. The frequency of inspections and
maintenance must be increased as environment, severity and
frequency of usage requires.
Pre-Start Inspection
It is the User’s or Operator’s primary responsibility to perform a
Pre-Start Inspection of the machine prior to use daily or at
each change of operator. Reference the Operation and Safety
Manual for completion procedures for the Pre-Start Inspec-
tion. The Operator and Safety Manual must be read in its
entirety and understood prior to performing the Pre-Start
Inspection.
Pre-Delivery Inspection and Frequent Inspection
The Pre-Delivery Inspection and Frequent Inspection shall be
performed by a qualified JLG equipment mechanic. JLG Indus-
tries, Inc. recognizes a qualified JLG equipment mechanic as a
person who, by possession of a recognized degree, certificate,
extensive knowledge, training, or experience, has successfully
demonstrated the ability and proficiency to service, repair, and
maintain the subject JLG product model.
The Pre-Delivery Inspection and Frequent Inspection proce-
dures are performed in the same manner, but at different
times. The Pre-Delivery Inspection shall be performed prior to
each sale, lease, or rental delivery. The Frequent Inspection
shall be accomplished for each machine in service for 3
months or 150 hours (whichever comes first); out of service for
a period of more than 3 months; or when purchased used. The
frequency of this inspection must be increased as environ-
ment, severity and frequency of usage requires.
Reference the JLG Pre-Delivery and Frequent Inspection Form
and the Inspection and Preventive Maintenance Schedule for
items requiring inspection during the performance of these
inspections. Reference the appropriate areas of this manual for
servicing and maintenance procedures.
Annual Machine Inspection
The Annual Machine Inspection must be performed by a Fac-
tory-Trained Service Technician on an annual basis, no later
than thirteen (13) months from the date of the prior Annual
Machine Inspection. JLG Industries, Inc. recognizes a Factory-
Trained Service Technician as a person who has successfully
completed the JLG Service Training School for the subject JLG
product model. Reference the machine Service and Mainte-
nance Manual and appropriate JLG inspection form for perfor-
mance of this inspection.
Reference the JLG Annual Machine Inspection Form and the
Inspection and Preventive Maintenance Schedule for items
requiring inspection during the performance of this inspec-
tion. Reference the appropriate areas of this manual for servic-
ing and maintenance procedures.
For the purpose of receiving safety-related bulletins, it is
important that JLG Industries, Inc. has updated ownership
information for each machine. When performing each Annual
Machine Inspection, notify JLG Industries, Inc. of the current
machine ownership.
Preventive Maintenance
In conjunction with the specified inspections, maintenance
shall be performed by a qualified JLG equipment mechanic.
JLG Industries, Inc. recognizes a qualified JLG equipment
mechanic as a person who, by possession of a recognized
degree, certificate, extensive knowledge, training, or experi-
ence, has successfully demonstrated the ability and profi-
ciency to service, repair, and maintain the subject JLG product
model.
Reference the Preventive Maintenance Schedule and the
appropriate areas of this manual for servicing and mainte-
nance procedures. The frequency of service and maintenance
must be increased as environment, severity and frequency of
usage requires.
- P/N - 3121259 1
- AGENERAL 3
- BHYDRAULIC SYSTEM SAFETY 3
- CMAINTENANCE 3
- REVISON LOG 4
- TABLE OF CONTENTS 5
- SECTION 5 - HYDRAULICS 8
- 10
- LIST OF FIGURES 11
- SECTION 1. SPECIFICATIONS 17
- Major Component Weights 18
- Hydraulic Oil 18
- 1.6 FUNCTION SPEEDS 19
- Test Notes 19
- SECTION 1 - SPECIFICATIONS 20
- 1.7 OPERATOR MAINTENANCE 21
- SOCKET HEAD CAP SCREWS 26
- Magni Coating (Ref 4150701)* 30
- SECTION 2. GENERAL 31
- 2.2 SERVICE AND GUIDELINES 32
- Safety and Workmanship 32
- Cleanliness 32
- SECTION 2 - GENERAL 33
- Changing Hydraulic Oil 34
- Lubrication Specifications 34
- 2.4 CYLINDER DRIFT TEST 34
- Platform Drift 34
- 2-10 – JLG Lift – 3121259 40
- 3.1 TIRES AND WHEELS 41
- Tire Replacement 41
- Wheel and Tire Replacement 41
- Wheel Installation 41
- 3-2 – JLG Lift – 3121259 42
- 3.6 DRIVE MOTOR 43
- 3-4 – JLG Lift – 3121259 44
- 3121259 – JLG Lift – 3-5 45
- 3-6 – JLG Lift – 3121259 46
- 3121259 – JLG Lift – 3-7 47
- 3-8 – JLG Lift – 3121259 48
- 3121259 – JLG Lift – 3-9 49
- 3.7 DRIVE HUB 50
- Roll, Leak and Brake Testing 50
- Tightening and Torquing Bolts 50
- Measuring Rolling Torque 51
- Main Disassembly 51
- 3-12 – JLG Lift – 3121259 52
- Housing-Spindle Disassembly 53
- 3-14 – JLG Lift – 3121259 54
- 3121259 – JLG Lift – 3-15 55
- Cover Disassembly 56
- 3121259 – JLG Lift – 3-17 57
- Planet Gear Subassembly 58
- Spindle-Brake Subassembly 59
- 3-20 – JLG Lift – 3121259 60
- Housing-Spindle Subassembly 61
- Housing-Ring Gear Subassembly 62
- Cover Subassembly 63
- Main Assembly 64
- 3121259 – JLG Lift – 3-25 65
- 3-26 – JLG Lift – 3121259 66
- 3121259 – JLG Lift – 3-27 67
- 3-28 – JLG Lift – 3121259 68
- 3121259 – JLG Lift – 3-29 69
- 3.8 OSCILLATING AXLE SYSTEM 70
- 3121259 – JLG Lift – 3-31 71
- 3.10 SWING MOTOR 72
- 3121259 – JLG Lift – 3-33 73
- 3-34 – JLG Lift – 3121259 74
- Disassembly and Inspection 75
- 3-36 – JLG Lift – 3121259 76
- 3121259 – JLG Lift – 3-37 77
- 3-38 – JLG Lift – 3121259 78
- 3121259 – JLG Lift – 3-39 79
- 3-40 – JLG Lift – 3121259 80
- 3121259 – JLG Lift – 3-41 81
- 3121259 – JLG Lift – 3-43 83
- 3-44 – JLG Lift – 3121259 84
- 3121259 – JLG Lift – 3-45 85
- 3-46 – JLG Lift – 3121259 86
- 3121259 – JLG Lift – 3-47 87
- One Piece Stator Construction 88
- Two Piece Stator Construction 89
- Final Checks 90
- Installation 90
- 3.11 SWING DRIVE 90
- 3121259 – JLG Lift – 3-51 91
- 3-52 – JLG Lift – 3121259 92
- M20x2.5 Thread 93
- 3-54 – JLG Lift – 3121259 94
- Wear Tolerance 96
- Swing Bearing Torque Value 96
- 3121259 – JLG Lift – 3-59 99
- Assembly 100
- FROM LAST JIB 101
- (ORIENTATION LOOKING TOWARDS 102
- LOWER UPRIGHT) 102
- ROTATED 28.5° CW 102
- 3121259 – JLG Lift – 3-63 103
- 3-64 – JLG Lift – 3121259 104
- 3121259 – JLG Lift – 3-65 105
- (3) LIMIT SWITCHES ARE PART 105
- OF LOWER BOOM HARNESS 105
- SWITCH SW152 OF 105
- LOWER BOOM HARNESS 105
- 3-66 – JLG Lift – 3121259 106
- 3121259 – JLG Lift – 3-67 107
- SEE DETAIL 108
- 3121259 – JLG Lift – 3-69 109
- 3.13 ENGINE START CONDITIONS 110
- 3.14 ENGINE RPM LEVELS 110
- Engine Stop RPM 110
- Idle RPM 110
- Mid Engine RPM 110
- 3121259 – JLG Lift – 3-71 111
- 3-72 – JLG Lift – 3121259 112
- 3.17 KUBOTA ENGINE 113
- Engine Oil Pressure Switch 113
- Engine Speed Sensor 113
- Coolant Sensor 114
- Glow Plugs 114
- Engine Speed Actuators 115
- Engine Start 116
- Alternator Excitation 116
- Fuel Pump 116
- Shutdown 116
- 3121259 – JLG Lift – 3-77 117
- 3-78 – JLG Lift – 3121259 118
- 3121259 – JLG Lift – 3-79 119
- 3-80 – JLG Lift – 3121259 120
- 3121259 – JLG Lift – 3-81 121
- 3-82 – JLG Lift – 3121259 122
- 3121259 – JLG Lift – 3-83 123
- 3-84 – JLG Lift – 3121259 124
- 3121259 – JLG Lift – 3-85 125
- 3-86 – JLG Lift – 3121259 126
- LP MIXER PURGE POINT 127
- HOSE FROM CARBON CANISTER 127
- 3-88 – JLG Lift – 3121259 128
- 3121259 – JLG Lift – 3-89 129
- VOLTAGE REGULATOR 130
- CONTROL BOX 130
- GENERATOR 130
- ASSEMBLY 130
- 3.22 COUNTERWEIGHT 131
- 3-92 – JLG Lift – 3121259 132
- 4.3 BOOM MAINTENANCE 133
- Disassembly of the Main Boom 133
- 4-2 – JLG Lift – 3121259 134
- Inspection 135
- Assembly of the Main Boom 135
- 4-4 – JLG Lift – 3121259 136
- 3121259 – JLG Lift – 4-5 137
- 4-6 – JLG Lift – 3121259 138
- 3121259 – JLG Lift – 4-7 139
- 4-8 – JLG Lift – 3121259 140
- 3121259 – JLG Lift – 4-9 141
- 4.5 ROTARY ACTUATOR 142
- Theory of Operation 142
- Tools Required 143
- Disassembly 144
- 3121259 – JLG Lift – 4-13 145
- 4-14 – JLG Lift – 3121259 146
- 3121259 – JLG Lift – 4-15 147
- 4-16 – JLG Lift – 3121259 148
- 3121259 – JLG Lift – 4-19 151
- 4-20 – JLG Lift – 3121259 152
- 3121259 – JLG Lift – 4-21 153
- Greasing Thrust Washers 154
- Testing the Actuator 154
- 3121259 – JLG Lift – 4-23 155
- Installation and Bleeding 156
- Troubleshooting 157
- 4-26 – JLG Lift – 3121259 158
- SECTION 5. HYDRAULICS 159
- Dip Method 160
- Spray Method 160
- Brush-on Method 160
- 5.2 HYDRAULIC CYLINDERS 161
- General Information 161
- Standard of Maintenance 161
- Inspection After Assembly 161
- SECTION 5 - HYDRAULICS 162
- Disassembly Procedure 164
- JIG FOR 168
- DUST WIPER 168
- 3121259 – JLG Lift – 5-21 179
- 3121259 – JLG Lift – 5-23 181
- 5-24 – JLG Lift – 3121259 182
- 3121259 – JLG Lift – 5-25 183
- 3121259 – JLG Lift – 5-29 187
- 5-30 – JLG Lift – 3121259 188
- 5.3 DRIVE PUMP 192
- Description 192
- The System Circuit 193
- Charge Pressure Relief Valve 194
- Plug Size and Torque Chart 215
- Initial Startup Procedures 218
- Pump Adjustment 222
- Control Neutral Adjustment 226
- Mechanical Neutral Adjustment 227
- Removing the Pump 228
- Electric Control Module 228
- Control Solenoids 229
- Charge Check / HPRV 231
- 5.4 GEAR PUMP 232
- 5.6 OIL SAMPLING 243
- Procedure 243
- INSTRUCTIONS 245
- Introduction 245
- 6.2 ANALYZER MENU STRUCTURE 246
- Using the Analyzer 247
- Analyzer 248
- Machine Setup 250
- Level Vehicle Description 250
- 3121259 – JLG Lift – 6-7 251
- 6-8 – JLG Lift – 3121259 252
- PLATFORM MODULE 253
- GROUND MODULE 253
- 6-10 – JLG Lift – 3121259 254
- 3121259 – JLG Lift – 6-11 255
- 6-12 – JLG Lift – 3121259 256
- 3121259 – JLG Lift – 6-13 257
- 6-14 – JLG Lift – 3121259 258
- 3121259 – JLG Lift – 6-15 259
- Ground Control Switches 260
- Platform Control Switches 260
- 3121259 – JLG Lift – 6-17 261
- 6-18 – JLG Lift – 3121259 262
- 3121259 – JLG Lift – 6-19 263
- ANALYZER 264
- 3121259 – JLG Lift – 6-21 265
- 6-22 – JLG Lift – 3121259 266
- 3121259 – JLG Lift – 6-23 267
- 6-24 – JLG Lift – 3121259 268
- 3121259 – JLG Lift – 6-25 269
- 6-26 – JLG Lift – 3121259 270
- 3121259 – JLG Lift – 6-27 271
- 6-28 – JLG Lift – 3121259 272
- 3121259 – JLG Lift – 6-29 273
- 6-30 – JLG Lift – 3121259 274
- 3121259 – JLG Lift – 6-31 275
- 6-32 – JLG Lift – 3121259 276
- 6.6 SYSTEM FAULT MESSAGES 277
- 6-34 – JLG Lift – 3121259 278
- 3121259 – JLG Lift – 6-35 279
- 6-36 – JLG Lift – 3121259 280
- 3121259 – JLG Lift – 6-37 281
- 6-38 – JLG Lift – 3121259 282
- 3121259 – JLG Lift – 6-39 283
- 6-40 – JLG Lift – 3121259 284
- 3121259 – JLG Lift – 6-41 285
- 6-42 – JLG Lift – 3121259 286
- 3121259 – JLG Lift – 6-43 287
- 6-44 – JLG Lift – 3121259 288
- 3121259 – JLG Lift – 6-45 289
- 6-46 – JLG Lift – 3121259 290
- 3121259 – JLG Lift – 6-47 291
- 6-48 – JLG Lift – 3121259 292
- 3121259 – JLG Lift – 6-49 293
- 6-50 – JLG Lift – 3121259 294
- 3121259 – JLG Lift – 6-51 295
- 6-52 – JLG Lift – 3121259 296
- 3121259 – JLG Lift – 6-53 297
- 6-54 – JLG Lift – 3121259 298
- 3121259 – JLG Lift – 6-55 299
- 6-56 – JLG Lift – 3121259 300
- 3121259 – JLG Lift – 6-57 301
- 6-58 – JLG Lift – 3121259 302
- 3121259 – JLG Lift – 6-59 303
- 6-60 – JLG Lift – 3121259 304
- 3121259 – JLG Lift – 6-61 305
- 6-62 – JLG Lift – 3121259 306
- 3121259 – JLG Lift – 6-63 307
- 6-64 – JLG Lift – 3121259 308
- 3121259 – JLG Lift – 6-65 309
- 6-66 – JLG Lift – 3121259 310
- 3121259 – JLG Lift – 6-67 311
- 6-68 – JLG Lift – 3121259 312
- 3121259 – JLG Lift – 6-69 313
- 6-70 – JLG Lift – 3121259 314
- 3121259 – JLG Lift – 7-1 315
- Resistance Measurement 316
- Continuity Measurement 316
- Current Measurement 317
- TO ELECTRICAL CONNECTIONS 317
- AMP Seal 318
- AMP Mate-N-Lok 319
- DIN Connectors 319
- Exclusions 319
- 7-6 – JLG Lift – 3121259 320
- AMP JUNIOR TIMER 320
- SEALED ENCLOSURES 320
- 7.4 AMP CONNECTOR 321
- 7-8 – JLG Lift – 3121259 322
- Wedge Lock 323
- Service - Voltage Reading 323
- 7-10 – JLG Lift – 3121259 324
- 7.5 DEUTSCH CONNECTORS 325
- DT/DTP Series Assembly 325
- DT/DTP Series Disassembly 325
- HD30/HDP20 Series Assembly 326
- HD30/HDP20 Series Disassembly 326
- 3121259 – JLG Lift – 7-13 327
- 7-14 – JLG Lift – 3121259 328
- 00111963-G 329
- 7-16 – JLG Lift – 3121259 330
- 1001119638-G 331
- 7-18 – JLG Lift – 3121259 332
- 7-20 – JLG Lift – 3121259 334
- KUBOTA ENGINE HARNESS 336
- GENERATOR HARNESS 337
- GM ENGINE HARNESS 338
- 7-26 – JLG Lift – 3121259 340
- 3121259 – JLG Lift – 7-29 343
- 7-30 – JLG Lift – 3121259 344
- 1001120020-C 345
- 7-32 – JLG Lift – 3121259 346
- JLG Worldwide Locations 348
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