Service Manual: Comprehensive Guide

Table of Contents

1. Content Overview
2. Introduction
3. Engine
4. Hydraulics System
5. Frames and Ballasting
6. Tracks and Track Suspension
7. Cab Climate Control
8. Electrical System
9. Booms, Dippers, and Buckets
10. Dozer Blade and Arm
11. Platform, Cab, Bodywork and Decals
12. Special Tools Index
13. Hydraulic Schematics
14. Electrical Schematics

Alternator – Static Description

The primary components of the charging system in focus are:

• The battery
• The generator
• The battery discharge indicator light circuit

The generator is a self-rectifying model with an integrated regulator.

Generator Details

The generator is designed as a brushless type, featuring several key components:

• Rotor and Stator
• Rectifier Assembly
• Front and Rear Brackets
• IC Regulator
• Bearings
• Pulley

The rotor and pulley are essential moving parts, while the field coil is securely attached to the rear bracket. To convert the three-phase alternating current, generated in the stator coil, into direct current, the system uses:

• Six main diodes (including positive and negative diodes)
• Three supplementary diodes referred to as the trio diode

These diodes play a crucial role in supplying field current.

Connection Terminals

This generator includes three terminals:

• B Terminal: Direct current output terminal
• L Terminal: Functions as both input and output terminal, thus allowing initial excitation current until power generation starts
• R Terminal: Supports initial current excitation

When the voltage at the L terminal aligns with the battery voltage, the charge indicator light switches off. Both bearings are sealed, removing the need for periodic lubrication.

Note: The IC regulator is non-disassemblable and should be serviced as a complete unit.