EasyManua.ls Logo

JLG 340AJ Service Manual

JLG 340AJ
370 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
Service and Maintenance Manual
Model
340AJ
P/N - 3121259
June 27, 2017

Table of Contents

Other manuals for JLG 340AJ

Question and Answer IconNeed help?

Do you have a question about the JLG 340AJ and is the answer not in the manual?

JLG 340AJ Specifications

General IconGeneral
Platform Height34 ft
Platform Capacity500 lb
Power SourceDiesel
Drive Speed - 4 Wheel Drive3.5 mph
Gradeability - 4 Wheel Drive45%
Turning Radius - Outside12 ft 6 in
Drive Speed3.5 mph
Platform Rotation180 Degrees
Ground Clearance12 in
Engine TypeDiesel
Swing355 Degrees Non-Continuous

Summary

Service and Maintenance Manual

SECTION A. INTRODUCTION - MAINTENANCE SAFETY PRECAUTIONS

A GENERAL

Contains general safety precautions for aerial platform maintenance to avoid injury or damage.

B HYDRAULIC SYSTEM SAFETY

Highlights the high pressures in hydraulic systems and safety measures.

C MAINTENANCE

Lists safety precautions to be observed during maintenance.

SECTION 1 - SPECIFICATIONS

1.1 OPERATING SPECIFICATIONS

Details operational specifications including capacity, travel grade, speed, and system voltage.

1.2 DIMENSIONAL DATA

Provides key dimensions like turning radius, height, length, and width.

1.3 CAPACITIES

Lists capacities for hydraulic oil, drive hub lubricant, and engine coolant.

1.5 ENGINE DATA

Specifies engine details such as cylinders, bore, stroke, displacement, and RPMs.

1.6 FUNCTION SPEEDS

Outlines function speeds and tolerances for various operations.

1.7 OPERATOR MAINTENANCE

Details lubrication specifications and intervals for machine components.

SECTION 2 - GENERAL

2.1 MACHINE PREPARATION, INSPECTION, AND MAINTENANCE

Covers general information on preparing, inspecting, and maintaining the machine for safe operation.

2.2 SERVICE AND GUIDELINES

Provides general information and guidelines for using servicing and maintenance procedures.

2.3 LUBRICATION AND INFORMATION

Details hydraulic system contamination, oil types, and lubrication specifications.

2.6 WELDING ON JLG EQUIPMENT

Provides critical safety instructions for welding on JLG equipment to prevent damage.

SECTION 3 - CHASSIS & TURNTABLE

3.1 TIRES AND WHEELS

Guidelines for tire replacement, characteristics, and wheel installation.

3.5 DRIVE SYSTEM

Description of the drive system, including pump, motors, and flow dividers.

3.6 DRIVE MOTOR

Detailed instructions for the disassembly and assembly of the drive motor.

3.7 DRIVE HUB

Procedures for roll, leak, and brake testing, and bolt tightening for drive hubs.

3.10 SWING MOTOR

Describes the swing motor and provides procedures for removal and installation.

3.11 SWING DRIVE

Details the components, removal, and installation procedures for the swing drive assembly.

3.12 ENGINE OPERATING STATES

Explains the four engine operating states: Stopped, Cranking, Starting, and Running.

3.13 ENGINE START CONDITIONS

Lists the conditions required for the engine to start.

3.17 KUBOTA ENGINE

Provides details on the Kubota engine's oil pressure switch and speed sensor.

3.18 GM DUAL FUEL ENGINE

Describes the GM Dual Fuel engine's control system and fuel selection.

SECTION 4 - BOOM & PLATFORM

4.1 PLATFORM CONTROL ENABLE SYSTEM

Explains the time-dependent enable circuit for platform controls.

4.2 TRANSPORT POSITION SENSING SYSTEM

Details the system that senses boom angles for high-speed travel conditions.

4.3 BOOM MAINTENANCE

Provides procedures for the disassembly and assembly of the main boom.

4.5 ROTARY ACTUATOR

Explains the theory of operation and disassembly/assembly of the rotary actuator.

SECTION 5 - HYDRAULICS

5.1 LUBRICATING O-RINGS IN THE HYDRAULIC SYSTEM

Details procedures for lubricating O-rings in hydraulic fittings using cup/brush, dip, or spray methods.

5.2 HYDRAULIC CYLINDERS

Covers disassembly, assembly, general information, and inspection of hydraulic cylinders.

5.3 DRIVE PUMP

Description and diagrams of the Sauer-Danfoss H1 tandem closed circuit piston pumps.

5.5 PRESSURE SETTING PROCEDURE

Step-by-step instructions for setting relief valves for main, swing, steer, and platform level systems.

SECTION 6 - JLG CONTROL SYSTEM

6.1 JLG CONTROL SYSTEM ANALYZER KIT INSTRUCTIONS

Introduction to the analyzer kit, its purpose, and the machine configuration process.

6.2 ANALYZER MENU STRUCTURE

Details the seven levels of the analyzer menu structure for navigation and diagnostics.

6.3 USING THE HAND HELD ANALYZER

Instructions on connecting the analyzer and navigating its menus for machine parameter adjustments.

6.4 OPERATOR CONTROLS AND SWITCHES

Identifies and describes the function of ground and platform control switches and joysticks.

6.5 CONTROL SYSTEM STARTUP CHECKS

Outlines actions and checks performed during system startup for proper function.

6.8 SYSTEM FAULT MESSAGES

Provides information on system fault messages, DTCs, and troubleshooting procedures.

SECTION 7 - BASIC ELECTRICAL INFORMATION & SCHEMATICS

7.1 GENERAL

Provides basic electrical information and schematics for troubleshooting operating problems.

7.2 MULTIMETER BASICS

Explains basic multimeter usage for circuit measurements like voltage, resistance, and continuity.

7.3 APPLYING SILICONE DIELECTRIC COMPOUND TO ELECTRICAL CONNECTIONS

Details the procedure for applying dielectric grease to electrical connectors to prevent oxidation.

7.4 AMP CONNECTOR

Provides assembly and disassembly instructions for AMP connectors.

7.5 DEUTSCH CONNECTORS

Details assembly and disassembly procedures for DT/DTP and HD/HDP series Deutsch connectors.

Related product manuals