John Deere 85G Excavator Operation & Test Technical Manual (TM12867)

John Deere 85G Excavator Operation & Test Technical Manual (TM12867 05JUN19)

This official technical manual provides detailed diagnostic, operational, and testing procedures for the John Deere 85G Excavator. It includes troubleshooting for the engine, electrical system, hydraulics, and powertrain, along with system performance evaluations and ECU fault codes.

Model Covers:

85G Excavator (PIN: 1FF085GX__J017001- )

File Format: PDF

Size: 31.69 MB

No. of pages: 850

Language: English

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

📑 Table of Contents Overview:

General Information & Safety

• Operator safety guidelines and precautions
• Machine inspection and maintenance procedures
• Preventing unintended machine movement
• Emergency preparedness and hazard prevention
• Proper recycling and disposal of fluids

Diagnostics & Troubleshooting

• Main Controller (MCZ) diagnostic trouble codes (DTCs)
• ECU fault codes and error troubleshooting
• CAN communication circuit diagnostics
• Travel pilot pressure sensor and solenoid valve testing

Operational Checkout Procedures

• Engine OFF, Key OFF system checks
• Engine ON, Key ON hydraulic system tests
• Blade function, travel mode, and swing speed verification

Engine System

• Yanmar engine operation and diagnostics
• Fuel injection system and cold weather starting aids
• Cooling system pressure checks and troubleshooting
• Engine speed control adjustments and testing

Electrical System

• Wiring schematics and fuse panel locations
• Battery, alternator, and starter motor diagnostics
• Controller Area Network (CAN) communication analysis

Power Train

• Track adjustment and undercarriage wear assessment
• Propel motor and travel gear case diagnostics

Hydraulic System

• Pilot system pressure regulation
• Hydraulic pump flow testing and calibration
• Control valve function tests and troubleshooting
• Travel motor and swing motor speed calibration

Heating & Air Conditioning System

• Cab air circulation and blower motor troubleshooting
• Air conditioning compressor and refrigerant testing
• Cab heating system and ventilation diagnostics

This John Deere 85G Excavator Operation & Test Technical Manual is an essential resource for technicians, mechanics, and equipment operators, providing comprehensive diagnostics, troubleshooting, and system testing procedures for maintaining peak excavator performance.