JLG 660SJC Service Manual

Service and Maintenance Manual
Models
600SC
660SJC
SN 0300236299 to Present
PN - 3121776
November 30, 2018 - Rev C
AS/NZS
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JLG 660SJC Specifications

General

Platform Size	36 in x 96 in
Overall Width	8 ft
Overall Length	42 ft 8 in
Weight	23, 400 lb
Fuel Type	Diesel
Overall Height	2.59 m
Stowed Height	2.59 m
Drive Speed	4.8 km/h
Drive Speed - 4WD	4.8 km/h

Summary

SECTION A. INTRODUCTION - MAINTENANCE SAFETY PRECAUTIONS

A GENERAL

General safety precautions for aerial platform maintenance.

B HYDRAULIC SYSTEM SAFETY

Safety precautions for high-pressure hydraulic systems.

C MAINTENANCE

General maintenance safety precautions and warnings.

SECTION 1 - SPECIFICATIONS

1.1 OPERATING SPECIFICATIONS

Technical data for machine operation.

1.4 ENGINE DATA

Specifications related to the engine.

1.8 MAINTENANCE AND LUBRICATION

Procedures for routine maintenance and lubrication.

SECTION 2 - GENERAL

2.1 MACHINE PREPARATION, INSPECTION, AND MAINTENANCE

Procedures for preparing, inspecting, and maintaining the machine.

2.2 SERVICE AND GUIDELINES

2.4 CYLINDER DRIFT

2.5 PINS AND COMPOSITE BEARING REPAIR GUIDELINES

2.6 WELDING ON JLG EQUIPMENT

Safety instructions for welding on JLG equipment.

SECTION 3 - CHASSIS & TURNTABLE

3.1 CHASSIS COMPONENTS AND SERVICING

Details on chassis components and their servicing.

3.2 SWING DRIVE HUB

3.3 SWING BEARING

Procedures for checking and replacing the swing bearing.

3.5 DEUTZ TD2.9 L4 ENGINE

3.6 DEUTZ D2011L04 ENGINE

3.9 DEUTZ TD 2.9 L4 GUO III ENGINE

3.11 GENERATOR

SECTION 4 - BOOM & PLATFORM

4.3 DUAL CAPACITY SYSTEM

4.4 PLATFORM LOAD SENSING SYSTEM

System for detecting platform load and preventing overload.

4.6 FUEL LEVEL CUTOUT SYSTEM

System that shuts down the engine when fuel is low.

4.8 ROTATOR AND SLAVE CYLINDER

4.9 MAIN BOOM ASSEMBLY

Steps for removing and installing the main boom assembly.

4.10 MAIN BOOM LIFT CYLINDER

4.12 WIRE ROPE

4.13 WIRE ROPE TENSIONING ADJUSTMENT

Procedure for adjusting wire rope tension.

4.15 JIB (IF EQUIPPED)

4.17 FOOT SWITCH ADJUSTMENT

Procedure for adjusting the foot switch.

4.19 POWERTRACK MAINTENANCE

4.20 SKYGUARD

SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS

5.2 HYDRAULIC CONNECTION ASSEMBLY AND TORQUE SPECIFICATION

Guidelines for assembling hydraulic connections and torque values.

5.3 HYDRAULIC PUMP (GEAR)

5.4 VARIABLE PUMP

5.5 MAIN VALVE BLOCK PRESSURE SETTING PROCEDURE

Steps for setting pressure in the main valve block.

5.7 PLATFORM VALVE BLOCK PRESSURE SETTING PROCEDURE

Steps for setting pressure in the platform valve block.

SECTION 6 - JLG CONTROL SYSTEM

6.1 JLG CONTROL SYSTEM ANALYZER KIT INSTRUCTIONS

Instructions for using the JLG Control System Analyzer.

6.5 SYSTEM TEST

6.8 CALIBRATING TILT SENSOR

Calibration procedure for the tilt sensor.

6.9 CALIBRATING BOOM ANGLE

Calibration procedure for boom angle.

6.12 CALIBRATING PLATFORM ANGLE SENSOR

6.15 MACHINE FAULT CODES

List of machine fault codes.