John Deere 27D Excavator Diagnostic Operation and Test Manual (TM2355)

John Deere 27D Excavator Diagnostic Operation and Test Manual (TM2355 19JUL14)

This technical manual provides detailed diagnostic procedures, operational tests, and troubleshooting guides for the John Deere 27D Excavator. It covers engine performance testing, hydraulic system diagnostics, electrical troubleshooting, and air conditioning system checks to ensure efficient machine operation.

Model Covers:

Compact models 27D

File Format: PDF

Size: 28.31 MB

No. of pages: 438

Language: English

Delivery Method: Instant Download – Access your file immediately after purchase.

📑 Table of Contents Overview:

General Information

• Safety precautions and operational best practices
• Machine inspection and maintenance recommendations
• Battery handling, chemical safety, and fire prevention

Operational Checkout Procedures

• Ignition ON and Engine ON system checks
• Hydraulic oil pressurization and control valve function tests
• Blade function, travel tracking, and speed change tests

Engine System

• Engine cooling, lubrication, and fuel system operation
• Diagnostic procedures for starting issues and fuel system malfunctions
• Injection pump timing, valve clearance adjustments, and compression testing

Electrical System

• Wiring diagrams, fuse specifications, and component locations
• Battery, alternator, and starter motor diagnostics
• Solenoid, relay, and fuel shutoff circuit testing

Power Train

• Track adjuster and recoil spring servicing
• Propel gearbox function and swing bearing wear tests

Hydraulic System

• Hydraulic pump, control valve, and solenoid diagnostics
• Flow tests for pilot, main, and auxiliary hydraulic circuits
• Hydraulic cylinder bleeding and leakage tests

Heating and Air Conditioning System

• Air conditioning cycle operation and refrigerant handling
• Cab air filter, compressor clutch, and cooling fan diagnostics
• Heater system function testing

For complete service information, also see:

27D Excavator Repair .......... TM2356
Alternators and Starting Motors .......... CTM77
Super Caddy Oil Cleanup Procedure .......... CTM310
Hydraulic Cylinders .......... CTM120519
JDG10274 Ultrasonic Undercarriage Measurement Gauge .......... CTM10001

This John Deere 27D Excavator Diagnostic Operation and Test Manual is an essential resource for technicians, mechanics, and equipment owners, providing comprehensive diagnostics, testing, and troubleshooting procedures to maintain peak excavator performance.