Jlg G6-42A Service Manual Manuel d'utilisateur Page 153
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- Table des matières
- DEPANNAGE
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
8-25
G6-42A, G9-43A, G10-43A
Hydraulic System
Note: The extend/retract cylinder has a spacer that
MUST be installed over the rod
AFTER the head gland
and BEFORE the piston head.
3. Fasten the rod eye in a soft-jawed vise, and place a
padded support under and near the threaded end of
the rod to prevent any damage to the rod.
Note: Protect the finish on the cylinder rod at all times.
Damage to the surface of the rod can cause seal failure.
4. Lubricate and slide the head gland over the cylinder
rod. Install the piston head on to the end of the
cylinder rod. Loctite
®
242™ and install the set screw
in the piston head. Refer to Section 8.8.4, “Cylinder
Torque Specifications—G6-42A” or Section 8.8.5,
“Cylinder Torque Specifications—G9-43A & G10-
43A” for torque specifications for the piston head
and the set screw.
Note: Avoid using excess force when clamping the
cylinder barrel in a vise. Apply only enough force to hold
the cylinder barrel securely. Excessive force can
damage the cylinder barrel.
5. Place the cylinder barrel in a soft-jawed vise or other
acceptable holding devise.
Note: When sliding the rod and piston assembly into the
cylinder barrel, prevent the threaded end of the cylinder
barrel from damaging the piston head. Keep the cylinder
rod centered within the barrel to prevent binding.
6. Carefully insert the cylinder rod assembly into the
cylinder barrel.
7. Screw the head gland into the cylinder barrel and
tighten with a spanner wrench. Refer to Section
8.8.4, “Cylinder Torque Specifications—G6-42A” or
Section 8.8.5, “Cylinder Torque Specifications—G9-
43A & G10-43A” for torque specifications for the
head gland.
8. If applicable, install new counter balance valve into
block on the cylinder barrel.
e. General Cylinder Installation
1. Grease the bushings at the ends of the hydraulic
cylinder. Using an appropriate sling, lift the cylinder
into it’s mounting position.
2. Align cylinder bushing and install pin, lock bolt or
retaining clip.
3. Connect the hydraulic hoses in relation to the labels
or markings made during removal.
4. Before starting the machine, check level of hydraulic
fluid in reservoir. Add hydraulic fluid if needed. Refer
to Section 8.5.2, “Hydraulic Oil Reservoir Filling.”
5. Start the machine and run at low idle for about one
minute. Slowly activate hydraulic cylinder function in
both directions allowing cylinder to fill with hydraulic
oil.
6. Inspect for leaks and check level of hydraulic fluid in
reservoir. Add hydraulic fluid if needed. Shut the
engine OFF.
7. Wipe up any hydraulic fluid spillage in, on, near and
around the machine, work area and tools.
8. Close and secure the engine cover.
8.8.2 Cylinder Pressure Checking
Attach a 5000 psi (345 bar) gauge to the test port on the
P1 port on the priority valve to check the system
pressure.
Note: If a hydraulic cylinder pressure is greater than the
main control valve pressure, increase the main control
valve pressure by adjusting the main relief. Generally,
one half turn clockwise will be adequate to check an
individual circuit. Activate the circuit and if pressure is
obtained turn the main relief counter clockwise one half
turn. Re-check the main relief setting and adjust if
necessary.
8.8.3 Steering Cylinders
The steer cylinder is attached to each axle center
housing.The steer cylinder assembly can be found in
Section 5.3, “Axle Specifications And Maintenance
Information.” The steer cylinder is covered in the
appropriate manufacturer’s axle literature.
AXLE CENTER SECTION
STEERING CYLINDER
- 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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