JLG 340AJ Service and Maintenance Manual 2013 – Full Workshop PDF 3121259

Description

JLG 340AJ Service and Maintenance Manual – 2013 Edition, Document 3121259

This JLG 340AJ Service and Maintenance Manual is the full workshop PDF for the 340AJ articulating boom lift, published under document number 3121259 with a 2013 revision. It gives owners, fleet workshops, and field technicians the complete factory-level procedure set for inspection, preventive maintenance, component overhaul, hydraulic repair, engine service, and fault diagnosis. Every section is written around the 340AJ chassis and its two available powerplants, so torque values, pressure settings, wear limits, and adjustment data all apply directly to this machine rather than a generic family of lifts.

File Details

• Manual type: Service and Maintenance Manual
• Brand: JLG
• Model: 340AJ
• Document number: 3121259
• Revision/date: 2013
• Language: English
• Format: PDF
• Page count: 348 pages

IMAGES PREVIEW

Chapters Covered

• Section A – Introduction: Maintenance safety precautions, hydraulic system safety, mandatory maintenance rules
• Section 1 – Specifications: Operating specifications, dimensional data, capacities, tires, engine data, hydraulic oil, critical stability weights, function speeds, lubrication specifications
• Section 2 – General: Machine preparation, inspection and maintenance scheduling, pre-start, pre-delivery, frequent, annual inspection, preventive maintenance, service and guidelines, cylinder drift test, pins and composite bearing repair, welding on JLG equipment, lubrication schedule
• Section 3 – Chassis & Turntable: Tires and wheels, drive orientation system, drive speed cutback, drive/steer-boom interlock, drive system, drive motor, drive hub, oscillating axle system, chassis tilt indicator, swing motor, swing drive, engine operating states, engine start conditions, engine RPM levels, engine controls, Kubota engine startup, Kubota engine components, GM dual fuel engine, fuel reserve/cut-out, cold start system, generator, counterweight
• Section 4 – Boom: Platform control enable system, transport position sensing, boom maintenance and disassembly, boom cleanliness guidelines, rotary actuator theory, tools, disassembly, inspection, assembly, counterbalance valve, testing, installation and bleeding, troubleshooting, platform support torque values
• Section 5 – Hydraulics: O-ring lubrication, hydraulic cylinders (tower lift, upper lift, master, level, jib, steer, telescope, axle lockout), drive pump description and circuit, HPRV and charge check, charge pressure relief, electrical displacement control, disassembly, inspection, assembly, port locations, torque charts, troubleshooting, adjustment procedures, gear pump, pressure setting procedure, oil sampling
• Section 6 – JLG Control System: Analyzer kit instructions, analyzer menu structure, hand held analyzer use, access levels, adjusting parameters, machine setup, operator controls and switches, control system startup checks, system fault messages
• Section 7 – Basic Electrical Information & Schematics: Multimeter basics, dielectric compound application, AMP connector, Deutsch connectors, electrical schematics, hydraulic schematics

Across these sections, the JLG 340AJ Service and Maintenance Manual 2013 works as a single reference for both routine servicing and heavy repair. The specifications chapter fixes the operating envelope – 500 lb platform capacity, 33 ft 9 in platform height, 19 ft 11 in horizontal reach, 4060 psi maximum main relief hydraulic pressure, 12V DC system – so a technician can confirm a machine is within tolerance before releasing it. The general chapter builds the inspection program around JLG’s recommended intervals and gives you the cylinder drift test and composite bearing repair guidelines that keep the structure serviceable. The chassis and turntable chapter goes deep into the four-wheel drive system, oscillating axle, swing drive and swing motor, and covers the Kubota and GM engine control logic, RPM levels, and cold start behavior. Section 4 handles the main boom, jib, and platform support, including the Helac rotary actuator teardown with timing-mark procedures that are easy to get wrong if you don’t have the manual. Section 5 is the hydraulic heart of the document – cylinder rebuilds with piston nut and gland torque tables, the Sauer-Danfoss H1 tandem drive pump with EDC control, gear pump service, pressure limiter and charge pressure adjustment, and an oil sampling procedure. Section 6 turns the JLG control system into something you can actually diagnose, with analyzer menu flow, personality settings, machine setup, and a full fault code list tied to corrective actions. Section 7 closes the loop with multimeter technique, connector assembly, and the electrical and hydraulic schematics needed to trace a fault end to end.

What This Manual Lets You Do

With this JLG 340AJ workshop manual on hand you can carry out a full pre-delivery or annual inspection, rebuild a tower lift or master cylinder to the correct piston nut and gland torque, set the drive pump charge pressure and pressure limiter to spec, time and reassemble the rotary actuator, replace the swing motor, service the oscillating axle lockout cylinders, and clear JLG control system faults using the analyzer. It supports both the Kubota D1105-E3 diesel and the GM 0.97L dual fuel engine, so the same document works across the 340AJ fleet regardless of powerplant. Torque charts, port locations, function speed tolerances, and drift limits are all present, which means you can measure a machine against the factory numbers instead of guessing.

Getting the right procedure and the right specification matters on an aerial work platform because the consequences of a wrong torque value or an unbled hydraulic circuit are not just a comeback – they are a safety event. The JLG 340AJ Service and Maintenance Manual 2013 removes that risk by putting the manufacturer’s own sequences, clearances, and pressures in front of you. Because it is delivered as an instant-download PDF, there is no shipping wait and no physical binder to lose; open it on a laptop in the bay, a tablet on the platform, or print only the pages you need for the job. Search the file, jump to the section you are working on, and get the machine back into service with the correct data.