JLG 120HX Manuals

Manuals and User Guides for JLG 120HX. We have 1 JLG 120HX manual available for free PDF download: Service And Maintenance Manual

JLG 120HX Service And Maintenance Manual

JLG 120HX Service And Maintenance Manual (112 pages)

Brand: JLG | Category: Lifting Systems | Size: 3 MB

Table of Contents

A General
3
Table of Contents
6
Capacities
11
- Turning Radius (4 Wheel Steer)
  12
Function Speeds (Machines Built after S/N 38697)
13
- Lubrication
  15
Lubrication Chart
17
Subject - Section, Paragraph

18
Section 2. Procedures

21
- General
  21
- Servicing and Maintenance Guidelines
  21
  - Safety and Workmanship
    21
  - Cleanliness
    21
  - Components Removal and Installation
    21
  - Component Disassembly and Reassembly
    21
  - Pressure-Fit Parts
    21
  - Bearings
    21
  - Gaskets
    22
  - Bolt Usage and Torque Application
    22
  - Hydraulic Lines and Electrical Wiring
    22
  - Hydraulic System
    22
  - Lubrication
    22
  - Battery
    22
  - Lubrication and Servicing
    22
- Lubrication Information
  22
  - Hydraulic Oil
    23
  - Changing Hydraulic Oil
    23
  - Lubrication Specifications
    23
- Cylinders - Theory of Operation
  23
- Valves - Theory of Operation
  23
  - Solenoid Control Valves (Bang-Bang)
    23
  - Manual Hydraulic Control Valves
    24
  - Relief Valves
    24
  - Crossover Relief Valves
    24
- Boom Chains
  24
  - Adjusting Procedures
    24
  - Inspection Procedure
    26
- Wear Pads
  28
- Drift Test
  28
  - Telescope Cylinder
    28
  - Lift Cylinder
    29
- Cylinder Checking Procedures
  29
- Cylinder Removal and Installation
  31
- Cylinder Repair
  33
  - Disassembly
    33
  - Cleaning and Inspection
    34
  - Assembly
    35
- Cylinder Piston Nut Torque Specifications
  36
- Boom Maintenance
  37
  - Removal
    37
  - Disassembly
    37
  - Inspection
    41
  - Assembly
    41
  - Installation
    42
- Tilt Alarm Switch
  44
  - Manual Adjustment
    44
  - Voltmeter Adjustment
    45
- Limit Switch Adjustments
  45
  - Boom Limit Switch
    45
  - Horizontal Cut-Out Switch
    45
- Throttle Checks and Adjustments - Deutz Engine
  45
- Pressure Setting Procedures
  45
  - Main Valve
    45
  - Frame Valve
    47
- Swing Bearing
  52
  - Turntable Bearing Mounting Bolt Condition Check
    52
  - Wear Tolerance
    53
  - Replacement
    53
  - Swing Bearing Torque Values
    55
- Drive Torque Hub
  55
  - Disassembly
    55
  - Cleaning and Inspection
    57
  - Assembly
    58
- Swing Torque Hub
  60
  - Disassembly
    60
  - Cleaning and Inspection
    60
  - Assembly
    60
  - Swing Torque Hub
    61
- Swing Brake
  63
  - Cleaning and Inspection
    63
  - Assembly
    63
  - Swing Brake
    64
- Drive Brake
  65
  - Disassembly
    65
  - Inspection
    65
  - Assembly
    65
- Free Wheeling Option
  67
  - To Disengage Drive Motors and Brakes (Free Wheel) for Towing, Etc
    67
  - To Engage Drive Motors and Brakes (Normal Operation)
    67
- PQ Controllers
  68
Subject - Section, Paragraph

72
Section 3. Troubleshooting

83
- General
  83
- Troubleshooting
  83
- Hydraulic Circuit Checks
  83
- Electrical Diagram - Boom Length Indicator
  104
- Electrical Schematic - Sheet 1 of 4
  105
- Electrical Schematic - Sheet 2 of 4
  106
- Electrical Schematic - Sheet 3 of 4
  107
- Electrical Schematic - Sheet 4 of 4
  108
- Hydraulic Schematic - (Sheet 1 of 2)
  109
- Hydraulic Schematic - (Sheet 2 of 2)
  110

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