JLG X14JH X14J X17J X19J X23J X390AJ X550AJ X700AJ Service and Maintenance Manual – 3121448 Rev B

Description

JLG X14JH X14J X17J X19J X23J X390AJ X550AJ X700AJ Service and Maintenance Manual

The JLG X14JH X14J X17J X19J X23J X390AJ X550AJ X700AJ Service and Maintenance Manual is the complete workshop documentation for this range of JLG compact crawler boom lifts. Document number 3121448 Rev B, dated June 6, 2012, brings together specifications, maintenance schedules, hydraulic and electrical schematics, engine service data, boom and platform procedures, and the JLG control system in one PDF. Whether you are servicing a single machine or managing a fleet, this manual gives you the procedures and values needed to keep these lifts operating safely and correctly.

File Details

• Manual Type: Service and Maintenance Manual
• Brand: JLG
• Models Covered: X14JH, X14J, X17J, X19J, X23J, X390AJ, X550AJ, X700AJ
• Document Number: 3121448 Rev B
• Date: June 6, 2012
• Language: English
• Page Count: 634
• File Format: PDF

Chapters Covered

• Section A — Introduction: Maintenance Safety Precautions, General Safety, Hydraulic System Safety, Maintenance Warnings
• Section 1 — Specifications: Capacities (Drive Hub, Hydraulic & Fuel Tank), Tracks (Track Specifications, Ground Bearing Pressure), Engine Data (Honda GX270-GX390, Honda iGX440, Hatz 1B30-1B40, Perkins 402D), Specifications and Performance Data (Reach Specifications, Dimensional Data, Chassis), Function Speeds, Pressure Settings, Serial Number Location
• Section 2 — General: Machine Preparation, Inspection and Maintenance (Pre-Start, Pre-Delivery, Frequent, Annual, Preventative), Service and Guidelines (Safety, Cleanliness, Component Removal/Installation, Pressure-Fit Parts, Bearings, Gaskets, Bolt Usage and Torque, Hydraulic Lines and Electrical Wiring, Hydraulic System, Lubrication, Battery), Lubrication and Information (Hydraulic System, Hydraulic Oil, Changing Hydraulic Oil, Lubrication Specifications), Cylinder Drift Test, Pins and Composite Bearing Repair Guidelines, Welding on JLG Equipment
• Section 3 — Chassis & Turntable: Rubber Track Maintenance (Checking Track Tension, Loosening/Tightening, Checking Rubber Tracks, Replacing Rubber Tracks, Checking Tightness of Nuts and Bolts), Undercarriage Components (Replacement Roller Lower Wheel and Track Adjuster, Replacement Wheel Drive and Motor), Cylinders and Enlargement Guide, Drive Gear Motor Table, Track Drive Bonfiglioli (MT700C077, 2T701C2K042002), Drive Hub Eaton, Swing Drive (IMO), Honda Engine GX270-GX390, Honda Engine iGX440, Hatz Engine 1B30-1B40, Perkins Engine 402D, Engine Removal, Changing the Electric Motor
• Section 4 — Boom & Platform: Boom Maintenance (Removal, Disassembly, Inspection, Assembly, Installation), Boom Disassembly X23J-X700AJ, Inspection (Ropes and Pulleys), Ropes Tension Adjustment Procedure, Rotary Actuator, Platform Removal/Installation, Load Cell and Footswitch Removal/Installation
• Section 5 — Hydraulics: Cylinder Repair (Cylinder with Sensor, Cylinder without Sensor, Piston Thread, Piston with Nut Thread, Telescope Cylinder), Replacement Hydraulic Pump, Function Pump (Seal Kit Replacement, Casappa), Hydraulic Component Start-Up Procedures and Recommendations, Pressure Setting Procedure, Hydraulic Schematic
• Section 6 — JLG Control System: Introduction, Platform/Remote Control Station LCD Display, CANbus Communications, Module Flashing Code, Remote Control Operation, Calibration Instructions, Platform Remote Control Service, Menu Input, Language, Menu Errors, Ramps, Currents, Working Hours, Machine Setup, Joystick, Calibrating Joystick, Configuration Serial Number Radio Remote Control (X17J Only)
• Section 7 — Basic Electrical Information & Schematics: How to Read the Wiring Diagrams, Photocells, Safety Exclusion, Slew Proximity, Stabilizers Pressure Sensors, Aerial Part Safety Chain (Outriggers Aligned Switches, Outriggers Switches), CAN Network, Cylinders Position Sensors, Remote Control Connector, Modem, Ropes Switch, Jib Position Switch, Pedal, Load Cell, Engine Stop Switches, Engine Start Push Buttons, Aerial Movement Abilitation Switch, Emergency Descend Electro Valves, Electric Power Supply, Ground Part (Tracks, Undercarriage Widening, 2° Speed, Proportional Electro Valves, Outriggers, Electric Diverter), Aerial Part (Basket Levelling, Basket Rotation, Jib, Proportional Electro Valve, 1° Cylinder, 2° Cylinder, Extension, Rotation), Thermic Engine Connection (Gasoline, Diesel), 110-220 Volt Electric Power Supply, Double Stabilization Area with Rotation Sensor, Electric Schedules Layout, Components Location, Battery Pack and BMS, Relais, Fuses, 12V Battery, CAN Bus Line, Main Switch, Ignition Key, Inverter, Motor, ECM

This JLG service manual is far more than a routine maintenance guide. It is the full service documentation set used by JLG-trained technicians, covering everything from the rubber tracks and undercarriage through the boom and platform assembly, the hydraulic circuit, the JLG control system, and the complete electrical schematics. The engine chapters alone span Honda GX270 and GX390, Honda iGX440, Hatz 1B30 and 1B40 diesel, and Perkins 402D, with torque values, service procedures, and troubleshooting flowcharts for each. Hydraulic sections include cylinder repair, pump replacement, pressure settings, and full hydraulic schematics for every model. The electrical section provides wiring diagrams broken down by application, component locations, and diagnostic trouble code charts for the BMS, inverter, and battery charger.

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Why This Manual Matters

These JLG compact crawler boom lifts operate in demanding conditions. Correct track tension, proper hydraulic pressure, accurate boom rope tension, and a properly calibrated JLG control system are not optional. The X14JH X14J X17J X19J X23J X390AJ X550AJ X700AJ Service and Maintenance Manual gives you the exact specifications, torque values, pressure settings, and calibration procedures needed to perform maintenance and repairs correctly. Without the right manual, you risk damaging sensitive hydraulic components, compromising safety systems, or causing premature wear. This document is the authoritative source for keeping these machines within factory tolerances.

Instant PDF Delivery

The manual is delivered as a PDF download immediately after payment. No shipping, no waiting. Access it on any device — laptop, tablet, or smartphone. Print the pages you need for the workshop. The PDF is fully text-searchable and covers every section from the introduction to the electrical schematics.

Whether you are performing a pre-delivery inspection, servicing the hydraulic system, troubleshooting the control system, or rebuilding a boom cylinder, this JLG service manual provides the procedures and data to do the job right.