Jlg G6-42A Service Manual Manuel d'utilisateur Page 42
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- Table des matières
- DEPANNAGE
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Boom
3-4
G6-42A, G9-43A, G10-43A
3.2 BOOM SYSTEM—THREE SECTION
3.2.1 Boom System Operation
The three section boom consists of the first, second and
third assemblies with a single extend chain, and a single
retract chain.
As the extend/retract cylinder, which is anchored at the
rear of the first boom section, and the front of the push
beam begins to extend, it forces the second and third
boom sections out of the first boom section.
The boom sections are connected by extend and retract
chains. These chains are routed around sheaves on the
front of the push beam and the rear of the second boom
section. As the extend/retract cylinder is forced out
hydraulically, the second boom section is pulled out by
the push beam, and third boom section is pulled out by
the extend chain.
As hydraulic pressure is applied to the retract port on the
extend/retract cylinder, the retract chain pulls the third
boom section and the push beam pulls the second boom
section back into the first boom section.
The mechanical linkage formed by the chains and
supporting hardware, extend and retracts the second and
third boom sections at the same rate.
The boom section lifts and lowers via action of the lift/
lower cylinder.
3.3 BOOM ASSEMBLY MAINTENANCE
These instructions provide the complete boom assembly
removal and installation or the second and third boom
sections removal and installation.
Before beginning, conduct a visual inspection of machine
and work area, and review task about to be undertaken.
Read, understand and follow these instructions. Boom
assembly consists of first, second and third section
booms and supporting hardware.
Note: Before removing the boom or boom section, the
carriage or any other attachment must be removed from
the quick switch.
Before beginning, conduct a visual inspection of machine
and work area, and review task about to be undertaken.
Read, understand and follow these instructions.
During service of the boom, perform the following:
1. Check wear pads. (Refer to Section 3.10, “Boom
Wear Pads.”)
2. Check hose sheaves and chain rollers.
3. Apply grease at all lubrication points (grease fittings).
(Refer to Section 2.6, “Lubrication Schedules.”)
4. Check for the proper operation by operating all the
boom functions through their full ranges of motion
several times.
Note: Depending on your particular circumstance, the
following procedures explain the removal/installation of
individual boom sections or removal/installation of the
complete boom
.
WARNING
NEVER weld or drill the boom unless approved in
writing by the manufacturer. The structural integrity of
the boom will be impaired if subjected to any repair
involving welding or drilling.
- 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
- 2.4.4 Engine Specifications 28
- 2.4.5 Tires 29
- 2.5.3 Capacities 32
- LB/FT (Nm) 33
- 2.7 LUBRICATION SCHEDULE 36
- 2.7.2 250 Hour 37
- 2.7.3 1000 Hour 38
- Section 3 39
- 3.1 BOOM SYSTEM 41
- 3.2 BOOM SYSTEM—THREE SECTION 42
- 3.4 COMPLETE BOOM REMOVAL/ 43
- INSTALLATION 43
- 3.5 BOOM SECTION 44
- REMOVAL/INSTALLATION 44
- 3.5.6 Second and Third Boom 51
- Section Installation 51
- 3.6 EXTEND/RETRACT CHAIN 53
- 3.7 PUSH BEAM—EXTEND/RETRACT 54
- CYLINDER REMOVAL/ 54
- Remove strong back 56
- 3.8 BOOM ADJUSTMENTS 58
- G9-43A/G10-43A 61
- 3.9 QUICK SWITCH ASSEMBLY 63
- 3.10 BOOM WEAR PADS 64
- Lubrication: 65
- 3.11 BOOM EXTEND AND 66
- RETRACT CHAINS 66
- 3.11.3 Inspection Guidelines 67
- 3.11.4 Chain Lubrication 68
- 3.12 FORKS 69
- 3.13 EMERGENCY BOOM LOWERING 69
- PROCEDURE 69
- 3.14 TROUBLESHOOTING 72
- Section 4 77
- Cab and Covers 77
- 4.1 OPERATOR CAB AND COVERS 78
- 4.2 OPERATOR CAB 80
- 4.3 CAB COMPONENTS 80
- 4.3.2 Service Brake Pedal 81
- 4.3.3 Accelerator Pedal 82
- Accelerator Pedal Removal 82
- 4.3.4 Boom Joystick Assembly 83
- Outrigger Joysticks 83
- (if equipped) 84
- 4.4 CAB REMOVAL 86
- 4.5 CAB INSTALLATION 87
- Section 5 89
- 5.2 AXLE SERIAL NUMBER 92
- 5.3 AXLE SPECIFICATIONS AND 92
- MAINTENANCE INFORMATION 92
- 5.4 AXLE REPLACEMENT 92
- 5.5 DRIVE SHAFTS 97
- 5.6 WHEELS AND TIRES 98
- 5.7 BRAKES 99
- 5.8 TOWING A DISABLED MACHINE 100
- Section 6 101
- Transmission 101
- COMPONENT TERMINOLOGY 102
- 6.1 TRANSMISSION ASSEMBLY 102
- AND MAINTENANCE INFORMATION 103
- 6.4 TRANSMISSION REPLACEMENT 103
- Internal Repair 105
- BY-PASS VALVE 107
- 6.6.2 Torque Convertor 108
- Diaphragm Installation 108
- 6.7 TROUBLESHOOTING 109
- Problem Cause Remedy 109
- Section 7 113
- 7.1 INTRODUCTION—CUMMINS 114
- G6-42A, G9-43A, G10-43A 115
- 7.2 ENGINE COOLING SYSTEM 117
- 7.3 ENGINE ELECTRICAL SYSTEM 120
- 7.4 FUEL SYSTEM 120
- 7.4.2 Fuel Tank 121
- 7.5 ENGINE EXHAUST SYSTEM 123
- 7.6 AIR CLEANER ASSEMBLY 125
- 7.7 ENGINE REPLACEMENT 127
- 7.7.2 Engine Installation 128
- Section 8 129
- Hydraulic System 129
- 8.1 HYDRAULIC COMPONENT 130
- TERMINOLOGY 130
- 8.2 SAFETY INFORMATION 132
- 8.4 HYDRAULIC CIRCUITS 134
- STABILIZER OPTION 139
- AUXILIARY 139
- HYDRAULICS OPTION 139
- 8.4.8 Anti-Stall System 142
- 8.5 HYDRAULIC RESERVOIR 143
- 8.6 IMPLEMENT PUMP 144
- 8.7 CONTROL VALVES 145
- 8.7.2 Service Brake Valve 148
- 8.7.3 Service Brake Bleeding 148
- 8.7.4 Steering Orbitrol Valve 149
- 8.7.5 Steer Select Valve 149
- 8.8 HYDRAULIC CYLINDERS 151
- AFTER the head gland 153
- 8.8.3 Steering Cylinders 153
- Section 9 157
- Electrical System 157
- 9.1 ELECTRICAL COMPONENT 159
- 9.2 SPECIFICATIONS 161
- 9.3 SAFETY INFORMATION 161
- 9.4 FUSES AND RELAYS 161
- SEE ACCESSORY MODULE 164
- 9.5.2 Options Schematic 165
- 9.5.4 Chassis Schematic 167
- PUMP DISPLACEMENT MODULE 168
- 9.6 ENGINE START CIRCUIT 170
- 9.7 CHARGING CIRCUIT 171
- 9.7.2 Alternator—LS 172
- 9.8 WINDOW WIPER/WASHER 173
- WINDSHIELD WIPER MOTOR 173
- Reservoir 174
- 9.9 CAB HEATER AND FAN 175
- 9.10 SOLENOIDS, SENSORS 176
- AND SENDERS 176
- 9.10.5 Fuel Level Sender 178
- 9.11 DISPLAY GAUGE AND 180
- DASH SWITCHES 180
- 9.11.3 Dash Switches 181
- 9.12 HAND HELD ANALYZER 183
- - G9-43A AND G10-43A 183
- MAL0890B 184
- DTC Event Comment Latched 187
- FAULT CODES 194
- JLG Worldwide Locations 206
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