JLG 400S 460SJ Service and Maintenance Manual 2010 – PDF Repair Guide

Description

JLG 400S 460SJ Service and Maintenance Manual – P/N 3120895

This is the complete JLG 400S and 460SJ Service and Maintenance Manual, publication number 3120895, dated December 28, 2010. It is the full workshop reference for these two aerial work platform models, covering every major system from the chassis and turntable through to the boom, platform, hydraulics and the JLG Control System (S/N 61718 to present). The manual also contains detailed engine service and diagnostic sections for the Ford LRG-425, Deutz F3M1011F/F3M2011F, Isuzu 4LE1, Caterpillar 3024/C2.2, GM 3.0L and Perkins 404C-22 engines.

Whether you are performing a routine 250-hour service, diagnosing a CAN bus fault on a Deutz EMR 2 engine, rebuilding a drive hub, or adjusting the swing bearing preload, this manual walks you through the procedure with the correct torque values, pressure settings, wear limits and step-by-step instructions.

File Details

• Manual type: Service and Maintenance Manual
• Brand: JLG
• Models covered: 400S, 460SJ
• Document number: 3120895
• Date: December 28, 2010
• Language: English
• File format: PDF
• Page count: 460 pages

Chapters Covered

• Section A – Introduction, Maintenance Safety Precautions
  • General safety
  • Hydraulic system safety
  • Maintenance precautions
• Section 1 – Specifications
  • Capacities and engine specifications (Ford, Deutz, Isuzu, Caterpillar, GM, Perkins)
  • Tires and performance data
  • Torque requirements and critical stability weights
  • Major component weights
  • Function speeds and pressure settings
  • Cylinder specifications
  • Lubrication and hydraulic oil
  • Operator maintenance and lubrication
  • Propane regulator oil draining and fuel filter replacement
• Section 2 – General
  • Machine preparation, inspection and maintenance
  • Service and guidelines
  • Lubrication and information
  • Cylinder drift test
  • Pins and composite bearing repair
  • Welding on JLG equipment
• Section 3 – Chassis & Turntable
  • Tires and wheels
  • Drive hub disassembly and assembly (2WD, 4WD rear, 4WD steer)
  • Torque hub (4WD machines after S/N 0300076633)
  • Re-aligning torque hub input coupling
  • Drive brake and drive motor
  • Lockout valve adjustment and toe-in adjustment
  • 2WD hub removal and installation
  • Oscillating axle bleeding and lockout test
  • Swing bearing inspection, wear tolerance and replacement
  • Swing brake (prior to S/N 64802 and S/N 64802 to present)
  • Swing drive torque hub
  • Semi-track testing, removal and adjustment
  • Generator service
  • Ford EFI engine diagnostics
  • Deutz engine throttle checks and adjustments
  • Tilt alarm switch
  • Hydraulic welder (225-4) repair and troubleshooting
  • Deutz EMR 2 (S/N 77682 to present)
  • GM engine maintenance and dual fuel system
  • GM engine fuel system repair and LPG diagnosis
  • Perkins engine maintenance and radiator fill
  • DGC diagnostic support and trouble code definitions
• Section 4 – Boom & Platform
  • Boom removal, disassembly, inspection, assembly and installation
  • Articulating jib
  • Limit switch adjustments
  • Drive card setup procedures
  • Helac rotary actuator
• Section 5 – Hydraulics
  • Cylinder theory of operation
  • Cylinder repair (with and without counterbalance valves)
  • Valve theory of operation
  • Pressure setting procedures
  • Hydraulic motor repair (H Series Char-Lynn)
  • Hydraulic pump neutral adjustment
  • Non-feedback proportional electrical control (NFPE)
  • Hydraulic component start-up procedures
• Section 6 – JLG Control System (S/N 61718 to Present)
  • Analyzer connection and use
  • Access levels and parameter adjustment
  • Machine setup and level vehicle description
  • Machine personality settings
  • System test (platform and ground station)
  • Analyzer diagnostics menu structure
• Section 7 – Basic Electrical Information & Schematics
  • Multimeter basics
  • Checking switches
  • Dielectric compound application
  • AMP and Deutsch connectors
  • Electrical and hydraulic schematics

What This Manual Helps You Do

This is not a generic overview. It is the same service documentation used by JLG-trained technicians, and it is written for someone who is actually going to put their hands on the machine. The JLG 400S 460SJ Service and Maintenance Manual gives you the procedures, tolerances and diagnostic paths needed to keep the machine safe and productive across its full service life.

Key jobs this manual supports:

• Performing the full pre-start, frequent, annual and preventative maintenance schedules
• Diagnosing and repairing the drive hub, torque hub, drive brake and drive motor
• Setting drive card ramp times and current limits using the flow control card procedure
• Checking swing bearing bolt condition with a feeler gauge and measuring wear tolerance
• Replacing the swing bearing and torquing it to the correct sequence and value
• Bleeding the oscillating axle and performing the lockout test
• Reading and clearing diagnostic trouble codes on the Ford EFI, Deutz EMR 2, GM and DGC engine management systems
• Using the JLG Control System hand-held analyzer to change access levels, adjust personalities and run the built-in system test
• Servicing the hydraulic welder (225-4) including brush replacement, rectifier bridge testing and voltage changeover
• Rebuilding hydraulic cylinders with correct torque values for head, tapered bushing and holding valves
• Adjusting main relief, proportional relief, steer, level, jib and swing pressures
• Working on the Helac rotary actuator – disassembly, inspection and timing of the piston and shaft splines
• Servicing the GM 3.0L dual fuel system including the EPR, LPR, mixer, ETC and TMAP sensor
• Following the Perkins and Caterpillar radiator fill procedure to avoid air locks
• Troubleshooting the Sky Welder and on-board generator

Why It Matters

JLG aerial work platforms operate at high hydraulic pressures and carry people at height. Getting the torque wrong on a swing bearing bolt, or setting a relief pressure incorrectly, or missing a wear limit on a composite bearing, is not a minor issue. The JLG 400S 460SJ service manual gives you the exact values the manufacturer specifies, so the repair is right the first time.

The diagnostic sections in particular save time and money. The Ford EFI, Deutz EMR 2 and DGC trouble code tables tell you what the code means, what conditions set it, and what corrective action is recommended. The analyzer flow charts and system test procedures let you verify switch, valve and sensor operation without guesswork.

A Note on Coverage

This manual covers both the 400S and 460SJ models, and it covers multiple engine and option configurations across the production run. Some sections are marked with serial number breaks (for example, drive hub part numbers 2780243/2780244/2780246, swing brake prior to S/N 64802 and S/N 64802 to present, Ford EFI diagnostics prior to S/N 61718, and Deutz EMR 2 from S/N 77682 to present). Always check your machine serial number against the section heading before following a procedure, so you are using the correct variant.

Instant PDF Delivery

This JLG 400S 460SJ Service and Maintenance Manual PDF is delivered instantly after checkout. There is no shipping, no waiting for a physical book, and no risk of a lost or damaged copy. Download it to your laptop, tablet or phone and take it into the workshop with you. You can print the pages you need for the job in front of you – the torque charts, the wiring schematics, the hydraulic diagrams, the fault code tables – and keep the rest of the manual clean for future reference. If you own, service or maintain a JLG 400S or 460SJ, this is the reference you want within reach.