JLG Boom Lift EC450AJ EC520AJ Service & Maintenance Manual 31221583 2025

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JLG Boom Lift EC450AJ EC520AJ Service & Maintenance Manual 31221583 2025
Size: 101.36 MB
Format: PDF
Language: English
Brand: JLG
Type of Machine: Boom Lift
Type of Manual: Service & Maintenance Manual, Electrical and Hydraulic Diagrams
Model: JLG EC450AJ, EC520AJ Boom Lift
Serial Number: C300000700 to Present
Part Number: 31221583
Publication Date: 2025
Number of Pages: 602 Pages

Contents:

Section 1. Specifications​

1.1 General Specifications​

1.2 Tires​

1.3 Capacities​

1.4 Dimensional Data - EC450AJ​

1.5 Dimensional Data - EC520AJ​

1.6 Torque Specifications​

1.7 Lubrication Specifications​

1.8 Critical Stability Weights​

1.9 Major Component Weights​

1.10 Serial Number Locations​

1.11 Maintenance and Lubrication​

1.12 ThreadLocking Compound​

1.13 Torque Charts​

Section 2. General​

2.1 Machine Preparation, Inspection, and Maintenance​

2.2 Service and Guidelines​

2.3 Lubrication and Information​

2.4 Cylinder Drift​

2.5 Pins and Composite Bearing Repair Guidelines​

2.6 Welding on JLG Equipment​

Section 3. Chassis & Turntable​

3.1 Tires & Wheels​

3.2 Oscillating Axle System​

3.3 Chassis Tilt Indicator System​

3.4 Spindle​

3.5 Lockout Cylinder Bleeding​

3.6 Drive System (2WD & 4WD)​

3.7 Wheel Drive Assembly​

3.8 Speed Sensor​

3.9 Drive Hub​

3.10 Drive Motor (2WD)​

3.11 Drive Motor (4WD)​

3.12 Swing Bearing​

3.13 Swing Motor​

3.14 Battery Pack​

3.15 Charging Battery Modules​

3.16 Battery Monitoring System (BMS)​

3.17 Battery Charge Manager (BCM)​

3.18 Battery Charger​

3.19 Cold Weather Operation​

3.20 Hot Weather Operation (If Equipped)​

3.21 Battery Reductions Related To Soc% For Machine Operation​

3.22 Battery DTC Related To Reductions For Machine Operation​

3.23 Auxiliary Pump​

3.24 Counterweight​

Section 4. Boom & Platform​

4.1 Boom Systems​

4.2 Platform​

4.3 Platform Level Cylinder Removal​

4.4 Rotator​

4.5 Main Boom Powertrack​

4.6 Boom Maintenance​

4.7 Wear Pads​

4.8 Boom Cleanliness Guidelines​

4.9 Articulating Jib Boom​

4.10 Foot switch Adjustment​

4.11 Rotary Actuator​

4.12 Powertrack Maintenance​

4.13 Skyguard​

Section 5. Basic Hydraulic Information & Schematics​

5.1 Lubricating O-rings in the Hydraulic System​

5.2 Hydraulic Connection Assembly and Torque Specification​

5.3 Hydraulic Cylinders​

5.4 Cylinder Removal And Installation​

5.5 Tower Lift Cylinder Bleeding Procedure​

5.6 Pressure Setting Procedures​

5.7 Hydraulic Schematic​

Section 6. JLG Control System​

6.1 JLG Control System Analyzer Kit Instructions​

6.2 Machine Configuration Programming Information​

6.3 Machine Personality Settings​

6.4 Machine Orientation When performing test​

6.5 Calibrating Steer​

6.6 Calibrating Tilt Sensor​

6.7 Load Sensing System (LSS)​

6.8 Calibrating Boom Angle​

6.9 Calibrating Motor​

6.10 Resetting The MSSO System (If equipped)​

6.11 UGM DTC Related To Machine Operation​

6.12 UGM DTC Related To Battery Sub-system​

6.13 BCM DTC Related To Battery Sub-system​

Section 7. Basic Electrical Information & Electrical Schematics​

7.1 General​

7.2 Multimeter Basics​

7.3 Checking Switches​

7.4 Applying Silicone Dielectric Compound To Electrical Connections​

7.5 Dielectric Grease Application​

7.6 AMP Connector​

7.7 Deutsch Connectors​

7.8 Wiring Harness Connector Labels​

7.9 Electrical Schematics​