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379
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379 Guide
User manual for 379
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Table of contents
Document Outline
Section A. INTRODUCTION - MAINTENANCE SAFETY PRECAUTIONS
A General
B Hydraulic System Safety
C Maintenance
Section 1. Specifications
1.1 Capacities
1.2 Operating specifications
1.3 Generator
1.4 Battery Charger
1.5 Drive/Steer System
1.6 Tires
1.7 Function Speeds
Machine Orientation When Doing Speed Tests
Test Notes
1.8 Pressure Settings
1.9 Torque Requirements
1.10 Major Component Weights
1.11 Serial Number Location
1.12 Hydraulic Oil
1.13 Operator Maintenance
Section 2. General
2.1 Machine Preparation, Inspection, and Maintenance
General
Preparation, Inspection, and Maintenance
Pre-Start Inspection
Pre-Delivery Inspection and Frequent Inspection
Annual Machine Inspection
Preventative Maintenance
2.2 Service and Guidelines
General
Safety and Workmanship
Cleanliness
Components Removal and Installation
Component Disassembly and Reassembly
Pressure-Fit Parts
Bearings
Gaskets
Bolt Usage and Torque Application
Hydraulic Lines and Electrical Wiring
Hydraulic System
Lubrication
Battery
Lubrication and Servicing
2.3 Lubrication and Information
Hydraulic System
Hydraulic Oil
Changing Hydraulic Oil
Lubrication Specifications
2.4 Cylinder Drift Test
Platform Drift
Cylinder Drift
2.5 Pins and Composite Bearing Repair Guidelines
2.6 Welding on JLG Equipment
Do the Following When Welding on JLG Equipment
Do NOT Do the Following When Welding on JLG Equipment
2.7 Applying Silicone Dielectric Compound to Electrical Connections
Section 3. Chassis & Turntable
3.1 Tires & Wheels
Tire Inflation
Tire Damage
Tire Replacement
Wheel Replacement
Wheel Installation
3.2 Drive Hub -REAR (Prior to S/N 0300112585)
Disengaging for Towing
Engaging after Towing is Complete
Disassembly
Disassembly of Cover
Disassembly of the first stage planetary assembly (7)
Disassembly of second stage planet gears (1)
Assembly of first stage planetary assembly (7)
Assembly of end cover unit (8)
Final Assembly
Initial Start-Up and After Repairs
Oil Change Interval-Gear Drive
3.3 Drive Hub (S/N 115723 to Present)
Roll and Leak Testing
Tightening and Torquing Bolts
Main Disassembly
Output Carrier Disassembly
Input Carrier Disassembly
Hub-Spindle Disassembly
Cover Disassembly
Input Carrier Assembly
Output Planet Gear Assembly
Output Carrier Assembly
Hub-Spindle Assembly
Cover Subassembly
Main Assembly
3.4 Drive Brake - Mico
Disassembly
Assembly
Bleeding
3.5 Speed Sensor Adjustment
Adjustment Procedure
Speed Sensor Installation Verification
Verification w/ Analyzer Procedure
3.6 Oscillating Axle Lockout Test (If Equipped)
3.7 Oscillation Cylinder Bleeding
Bleeding Procedure
Checking Oscillation Cylinders
3.8 Swing Drive
Roll, Leak and Brake Testing
Tightening and Torquing Bolts
Motor Control Valve Disassembly
Motor and Brake Disassembly
Main Disassembly
Hub-shaft Disassembly
Carrier Disassembly
Hub-Shaft Sub-Assembly
Carrier Sub-Assembly
Main Assembly
Motor-Brake Subassembly
Motor-Brake Assembly
Motor Control Valve Assembly
Tube Fitting Assembly Procedures
Procedure for Setting Gear Backlash
3.9 Swing Bearing
Turntable Bearing Mounting Bolt Condition Check
Wear Tolerance
Replacement of Swing Bearing
Swing Bearing Torque Value
Swing Drive Installation
Setting Backlash
3.10 Battery Maintenance and Charging
Battery Maintenance, Quarterly
Optional On Board Generator
Battery Charging (On Board Charger)
Removing the Battery Box
3.11 Generator (Prior to S/N 88375)
Timing Sequences
To Connect the JLG Control System Analyzer to the Generator
Alarms and Fault Flash Codes
Output Current and Voltage Settings
Priming the Fuel Line
3.12 Generator (S/N 88375 to Present)
Engine
Alternator
Dynamo and Dynamo Voltage Regulator
Dynamo Output Fuse
Control Fuse
Start Battery
Engine Starter
Start Control Relay
Fuel Control Relay
Glow Plug Control Relay
Glow Plug
Fuel Pump
Fuel Solenoid
Engine Low Oil Pressure Switch
Engine Oil Temperature Sensor
Alternator Output Current Sensor
Engine Speed Sensor
RBS Engine/Generator Controller
Warnings and Safety Precautions
System Controls
System Status and Performance Monitoring
System Settings
RBS Start
RBS shutdown
RBS Alarms and Flash Codes
Resetting the RBS Controller
Maintenance Schedule
Troubleshooting
APU Engine Start Battery Boosting
3.13 Supplementary fuse for Engine Generator Controller
Tools And Material
Procedure
Section 4. Boom & Platform
4.1 Boom
Removal
Installation
4.2 Load Cell Calibration Procedure
4.3 Platform Rotator (Prior to S/N 0300130810)
Theory of Operation
Disassembly and Inspection
Assembly and Testing
4.4 Platform Rotator (S/N 0300130810 to Present)
Theory of Operation
Required Tools
Disassembly
Inspection
Assembly
4.5 Jib Rotator
Operating Principle
Disassembly
Inspection
Reassembly
Installing Counterbalance Valve
Testing the Actuator
Installation and Bleeding
Troubleshooting
Section 5. Hydraulics
5.1 Lubricating O-Rings in the Hydraulic System
Cup and Brush
Dip Method
Spray Method
Brush-on Method
5.2 Cylinders - Theory of Operation
Lift, Telescope, Slave, Master, Oscillation (if equipped), Jib (if equipped), and Steer
5.3 Cylinder Checking Procedures
Cylinder Without Counterbalance Valves
Cylinders With Single Counterbalance Valve
Cylinders With Dual Counterbalance Valve
5.4 Cylinder Repair
Disassembly
Cleaning and Inspection
Assembly
5.5 Pressure settings
Proportional Main Relief
Lift Down
Lift Up
Swing
Flow Control / Bang Bang Main Relief
Steer
Platform Level Down
Platform Level Up Relief
Jib Relief
Section 6. JLG Control System
6.1 Introduction
6.2 To Connect the JLG Control System Analyzer
6.3 Using the Analyzer
6.4 Changing the Access Level of the Hand Held Analyzer
6.5 Adjusting Parameters Using the Hand Held Analyzer
6.6 Machine Setup
6.7 Machine Personality Settings
6.8 Machine Configuration Programming Information
6.9 Level Vehicle Description
Help Descriptions and Fault Flash Codes
6.10 Analyzer Diagnostics Menu Structure
6.11 System Self Test
Section 7. Basic Electrical Information & Schematics
7.6 General
7.7 Multimeter Basics
Grounding
Backprobing
Min/Max
Polarity
Scale
Voltage Measurement
Resistance Measurement
Continuity Measurement
Current Measurement
7.8 Checking Switches
Basic Check
Limit Switches
Automatic Switches
Switch Wiring - Low Side, High Side
7.9 Applying Silicone Dielectric Compound to Electrical Connections
7.10 AMP Connector
Applying Silicone Dielectric Compound to AMP Connectors
Assembly
Disassembly
Wedge Lock
Service - Voltage Reading
7.11 Deutsch Connectors
DT/DTP Series Assembly
DT/DTP Series Disassembly
HD30/HDP20 Series Assembly
HD30/HDP20 Series Disassembly
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