Guardian 4270 Manuals

Guardian 4270 Manuals

Manuals and User Guides for Guardian 4270. We have 1 Guardian 4270 manual available for free PDF download: Diagnostic Repair Manual

Guardian 4270 Diagnostic Repair Manual

Guardian 4270 Diagnostic Repair Manual (100 pages)

RECREATIONAL VEHICLE GENERATOR

Brand: Guardian | Category: Inverter | Size: 9 MB

Table of Contents

Replacement Parts
2
Table of Contents
3
Section 1

5
Safety

5
Generator Fundamentals

5
Section 2

10
Major Generator Components

10
- Rotor Assembly
  10
- Stator Assembly
  10
- Brush Holder
  11
- Battery Charge Components
  11
- Excitation Circuit Components
  11
- Voltage Regulator
  12
- Major Generator Components
  13
- Control Panel Component Identification
  13
Section 3

14
Insulation Resistance Tests

14
- Effects of Dirt and Moisture
  14
- Insulation Resistance Testers
  14
- Drying the Generator
  14
- Cleaning the Generator
  14
- Stator Insulation Resistance
  15
- Insulation Resistance Tests
  16
- Testing Rotor Insulation
  16
- The Megohmmeter
  16
Section 4

17
Measuring Electricity

17
- Meters
  17
- The vom
  17
- Measuring Ac Voltage
  17
- Measuring DC Voltage
  17
- Measuring Ac Frequency
  18
- Measuring Current
  18
- Measuring Resistance
  18
- Electrical Units
  19
- Ohm's Law
  19
Section 5

20
Engine DC Control System

20
- Introduction
  20
- Operational Analysis
  20
- Engine Controller Circuit Board
  26
- Battery
  26
- Test
  27
- Green Led
  27
- 14 Amp Fuse
  28
- Preheat Switch
  28
- Start-Stop Switch
  28
- Starter Contactor & Motor
  28
- Engine Governor
  29
- Fuel Injection Pump
  29
- Fuel Nozzles/Injectors
  29
- Glow Plugs
  29
- Engine Protective Devices
  30
- Low Oil Pressure Switch
  30
- High Coolant Temperature Switch
  30
- Overspeed Protection
  30
Section 6

31
Troubleshooting Flowcharts

31
Section 7

39
Diagnostic Tests

39
- Introduction
  39
- Check No-Load Voltage and Frequency
  39
- Check Engine Governor
  39
- Test Excitation Circuit Breaker
  40
- Fixed Excitation Test/Rotor Amp Draw
  40
- Test
  41
- Wire Continuity
  41
- Check Field Boost
  41
- Test Stator DPE Winding
  42
- Check Sensing Leads/Power Windings
  43
- Check Brush Leads
  43
- Check Brushes & Slip Rings
  44
- Check Rotor Assembly
  44
- Check Main Circuit Breaker
  45
- Check Load Voltage & Frequency
  45
- Check Load Watts & Amperage
  45
- Check Battery Charge Output
  45
- Check Battery Charge Rectifier
  46
- Check Battery Charge Windings/Battery Charge Resistor
  46
- Try Cranking the Engine
  47
- Test Pre-Heat Switch
  47
- Check Fuel Pump
  47
- Test
  48
- Check 14 Amp Fuse
  48
- Check Battery & Cables
  48
- Check Power Supply to Circuit Board
  48
- Check Start-Stop Switch
  49
- Check Power Supply to Wire 56
  50
- Check Starter Contactor
  50
- Check Starter Motor
  50
- Check Fuel Supply
  53
- Check Wire 14 Power Supply
  53
- TEST 30 - Check Wire 18
  53
- Check Fuel Solenoid
  53
- Test Pre-Heat Contactor
  54
- Test Glow Plugs
  54
- Test 34- Test D1 Diode
  54
Section 8

59
Assembly

59
- Major Disassembly
  59
  - Enclosure/Panel Removal
    59
  - Stator Removal
    59
  - Rotor Removal
    59
  - Engine Removal
    59
  - Belt Tensioning
    60
  - Starter Removal
    60
  - Fuel Injector Pump Removal
    60
  - Radiator Removal
    60
  - Re-Assembly
    60
  - Assembly
    61
Section 9

62
Exploded Views / Part Numbers

62
- Rocker Arm Assembly
  83
- Exploded Views / Part Numbers
  89
- Section 9
  89
Section 10

90
Specifications & Charts

90
- Major Features and Dimensions
  90
- Engine Specifications
  91
- Generator Specifications
  91
- Specifications & Charts
  92
- Rotor/Stator Resistance Values
  92
- Torque Specifications
  92
Section 11

94
- Section 11 Electrical Data
  94
Electrical Data

94

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