Complete Dianosis & Test service manual with Electrical Wiring Diagrams for John Deere 27D Excavator, with all the service information to maintain, diagnose, and service like professional mechanics.

John Deere 27D Mini Excavator workshop diagnostics test manual includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.

TM2355 - John Deere 27D Excavator Technical Manual (Operation & Test).pdf
TM2355 - John Deere 27D Excavator Technical Manual (Operation & Test).epub

Total Pages: 500 pages
File Format: PDF/EPUB/MOBI/AZW (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)
Language: English

MAIN SECTIONS
   Foreword
   Technical Information Feedback Form
   General Information
      Safety
   Operational Checkout Procedure
      Operational Checkout Procedure
   Engine
      Theory of Operation
      Diagnostic Information
      Tests
   Electrical System
      System Information
      System Diagrams
      Sub-System Diagnostics
      References
   Power Train
      Theory of Operation
      Diagnostic Information
   Hydraulic System
      Theory of Operation
      Diagnostic Information
      Tests
   Heating and Air Conditioning
      Theory of Operation
      Diagnostic Information
      Tests

tm2355 - 27D Excavator

Table of Contents

Foreword

Technical Information Feedback Form

Section 9000: General Information

Group 01: Safety

Recognize Safety Information

Follow Safety Instructions

Operate Only If Qualified

Wear Protective Equipment

Avoid Unauthorized Machine Modifications

Inspect Machine

Stay Clear of Moving Parts

Avoid High-Pressure Fluids

Avoid High-Pressure Oils

Work In Ventilated Area

Prevent Fires

Prevent Battery Explosions

Handle Chemical Products Safely

Decommissioning — Proper Recycling and Disposal of Fluids and Components

Prepare for Emergencies

Clean Debris from Machine

Add Cab Guarding for Special Uses

Use Steps and Handholds Correctly

Start Only From Operator's Seat

Use and Maintain Seat Belt

Prevent Unintended Machine Movement

Avoid Work Site Hazards

Keep Riders Off Machine

Avoid Backover Accidents

Avoid Machine Tip Over

Inspect and Maintain ROPS

Add and Operate Attachments Safely

Park and Prepare for Service Safely

Service Cooling System Safely

Remove Paint Before Welding or Heating

Make Welding Repairs Safely

Drive Metal Pins Safely

Section 9005: Operational Checkout Procedure

Group 10: Operational Checkout Procedure

Operational Checkout

Section 9010: Engine

Group 05: Theory of Operation

Engine Component Location

Engine Cooling System Operation

Engine Lubrication System Operation

Engine Fuel System Operation

Group 15: Diagnostic Information

Yanmar 3-Cylinder Engine Troubleshooting Manual

Engine Cranks But Will Not Start

Engine Misfires Or Runs Irregularly

Engine Does Not Develop Full Power

Engine Overheats

Coolant Temperature Too Low

Coolant in Oil or Oil in Coolant

Low Engine Oil Pressure

High Engine Oil Pressure

Engine Uses Too Much Oil

Engine Uses Too Much Fuel

Engine Emits Excessive White Exhaust Smoke

Engine Emits Excessive Black or Gray Exhaust Smoke

Fuel In Oil

Group 25: Tests

JT05801 Clamp-On Electronic Tachometer Installation

Engine Speed Check

Engine Speed Control Lever and Cable Adjustment

Fuel Injection Nozzle Check

Fuel Transfer Pump PressureTest

Injection Pump Timing Check and Adjustment

Fan Belt Tension Adjustment

Engine Valve Lash (Clearance) Check and Adjustment

Air Intake System Leakage Test

Cooling System Pressure Test

Radiator Cap Test

Engine Thermostat Test

Engine Compression Pressure Test

Engine Oil Pressure Test

Head Gasket Failure Check

Bleed Fuel System

Section 9015: Electrical System

Group 05: System Information

Electrical Diagram Information

Component Identification Table

Fuse (Blade-Type) Color Codes

Group 10: System Diagrams

Fuse Specifications

System Functional Schematic, Wiring Diagrams, and Component Locations Master Legend

System Functional Schematic

Battery and Power Cable (W6 and W7) Component Location

Main Harness (W8) Component Location

Main Harness (W8) Wiring Diagram

Platform Harness (W9) Component Location

Platform Harness (W9) Wiring Diagram

Engine Harness (W10) Component Location

Engine Harness (W10) Wiring Diagram

Heating and A/C Control Harness (W11) Component Location

Heating and A/C Control Harness (W11) Wiring Diagram

A/C Compressor Harness (W12) Component Location

A/C Compressor Harness (W12) Wiring Diagram

Cab Harness (W13) Component Location

Cab Harness (W13) Wiring Diagram

Boom Work Light Harness (W14) Component Location

Boom Work Light Harness (W14) Wiring Diagram

ROPS Work Light Harness (W15) Component Location

ROPS Work Light Harness (W15) Wiring Diagram

Auxiliary Function Control Harness (W19) Component Location

Auxiliary Function Control Harness (W19) Wiring Diagram

Group 15: Sub-System Diagnostics

Start Circuit Theory of Operation

Charge Circuit Theory of Operation

Fuel Shutoff Circuit Theory of Operation

Monitor Controller Circuit Theory of Operation

Pilot Control Shutoff Circuit Theory of Operation

Travel Speed Control and Alarm Circuit Theory of Operation

Heating and Air Conditioning Control Circuit Theory of Operation

Preheating Circuit Theory of Operation

Auxiliary Function Control Lever Circuit Theory of Operation

Group 20: References

Alternator and Starting Motors

Electrical Component Specifications

Alternator Test

Relay Test

Pressure Sensor Test

Solenoid Test

Fuel Shutoff Circuit Test

Electrical Component Checks

Monitor Controller Remove and Install

Disconnect Tab Retainer Connectors

Disconnecting Spring Wire Clip Connectors

Replace Metri-Pack® (Push Type) Connectors

Replace Metri-Pack® Connectors

Replace DEUTSCH® Circular Connectors

Replace DEUTSCH® Rectangular or Triangular Connectors

Install DEUTSCH® Contact

Replace WEATHER PACK® Connector

Install WEATHER PACK® Contact

Replace CINCH™ Connectors

Install CINCH™ Contact

Repair 32 and 48 Way CINCH™ Connectors

Remove Connector Body from Blade Terminals

Section 9020: Power Train

Group 05: Theory of Operation

Track Adjuster and Recoil Spring Operation

Travel Gearbox Operation

Group 15: Diagnostic Information

Diagnose Undercarriage Components Malfunctions

Measure Swing Bearing Wear

Section 9025: Hydraulic System

Group 05: Theory of Operation

Hydraulic System Diagram

Pilot System Diagram

Pilot Pump Operation

Pilot Filter Operation

Solenoid Valve Manifold Operation

Pilot Control Valve Operation

Travel Pilot Control Valve Operation

Blade, Swing Boom, and Auxiliary Pilot Control Valve Operation

Hydraulic Pump 1 and 2 Operation

Hydraulic Pump Regulator Operation

Hydraulic Pump 3 and Pilot Pump Operation

A/C Torque Control Solenoid Valve Operation

Control Valve Operation

System Relief Valve Operation

Circuit Relief Valve Operation

Swing Boom Make-Up Check Valve Operation

Flow Combiner Valve Operation

Auxiliary Flow Combiner Valve Operation

Auxiliary Flow Selector Solenoid Valve Operation (Optional)

Auxiliary Function Control Valve Operation

Arm Regenerative Valve Operation

Swing Gearbox Operation

Swing Motor Operation

Swing Motor Crossover Relief Valve Operation

Swing Motor Make-Up Check Valve Operation

Swing Motor Park Brake Release Circuit Operation

Center Joint Operation

Travel Motor and Brake Valve Housing Operation

Travel Motor Speed Circuit Operation

Blade Circuit Operation

Auxiliary Selector Valve Operation—If Equipped

Hydraulic Cylinder Operation

Hydraulic Oil Return Filter Operation

Hydraulic System Circuit Symbols

Hydraulic System Schematics

Group 15: Diagnostic Information

Diagnostic Procedure

Diagnose Hydraulic System Malfunctions

Diagnose Pilot Circuit Malfunctions

Diagnose Dig Circuit Malfunctions

Diagnose Swing Circuit Malfunctions

Diagnose Travel System Malfunctions

Major Component Location

Main Hydraulic Pilot System Line Identification

Main Hydraulic Working System Line Identification

Blade Hydraulic System Line Identification

Travel Hydraulic System Line Identification

Pilot Control Valve to Pattern Selector Valve Line Connection

Group 25: Tests

Hydraulic Oil Cleanup Procedure Using Portable Filter Caddy

JT05800 Digital Thermometer Installation

JT02156A Digital Pressure/Temperature Analyzer Installation

Hydraulic System Warm-Up Procedure

Cylinder Drift Test—Boom, Arm, Bucket, and Blade

Pilot Pressure Regulating Valve Test and Adjustment

Control Valve Spool Pilot Actuating Pressure Test

Hydraulic Pumps 1, 2, and 3 System Relief Valve Test and Adjustment

Circuit Relief Valve Test and Adjustment

Swing Motor Crossover Relief Valve Test and Adjustment

Hydraulic Pumps 1 and 2 Regulator Test and Adjustment—Engine Pulldown

Hydraulic Pump 1 and 2 Flow Test

Hydraulic Pump 3 Flow Test

Swing Motor Leakage Test

Travel Motor Leakage Test

Section 9031: Heating and Air Conditioning

Group 05: Theory of Operation

Air Conditioning System Cycle Of Operation

Group 15: Diagnostic Information

Diagnose Air Conditioning System Malfunctions

Diagnose Heater System Malfunctions

Air Conditioner and Heater Component Location

Group 25: Tests

Refrigerant Cautions and Proper Handling

Air Conditioner and Heater Operational Checks

Refrigerant Leak Test

Air Conditioner Compressor Clutch Test

R134a Air Conditioning System Test

Operating Pressure Diagnostic Chart

John Deere 27D Excavator Technical Manual (Operation & Test) - TM2355