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John Deere 850J Dozer Specs, Parts, and Serial Numbers (2005-2011)

John Deere

SKU:: John-Deere-850J-Dozer

Fits Models:

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Part # John-Deere-850J-Dozer

Description:

Serial Number Information

The serial number plate is located on the left side of the machine near the engine or cab frame.

Year	Serial Number Range
2005	#105842 – #117650
2006	#117651 – #134022
2007	#134023 and later

Use the serial number to ensure compatibility for hydrostatic, engine, and control system components.

Key Specifications

Feature	Specification
Engine Model	JD 6081H, 6-cylinder turbocharged diesel
Horsepower	185 HP
Transmission Type	Hydrostatic (HS)
Bucket Capacity	7.29 yd³
Operating Weight	39,865 lbs

Key Features

Powerful JD 6081H Turbo Diesel Engine

Delivers 185 HP and consistent torque output for earthmoving, slope work, and bulk pushing tasks.

Hydrostatic Transmission Precision

Hydrostatic drive allows infinite speed control, load sensing, and smooth directional changes—perfect for fine grading and difficult terrain.

High-Capacity Blade

The 7.29 cubic yard bucket is optimized for maximum productivity, especially in bulk material movement and grading operations.

Heavy-Duty Frame

At nearly 40,000 lbs, the 850J maintains excellent stability and blade traction in wet, rocky, or uneven conditions.

Common Replacement Parts

Reliable components available for the 850J at Broken Tractor:

Engine Components

Turbochargers, injectors, air filters, thermostats, water pumps

Hydrostatic Transmission

Hydraulic charge pumps, speed sensors, travel motors, control valves

Undercarriage

Track rollers, sprockets, idlers, track chains, recoil springs

Blade & Linkage

Tilt cylinders, cutting edges, wear plates, blade pins and bushings

Cab & Electrical

Control panels, seat assemblies, joystick controllers, wiring harnesses

Maintenance Schedule

Task	Recommended Interval
Engine Oil & Filter	Every 250 hours
Fuel Filter Service	Every 250 hours
Hydraulic System Service	Every 500 hours
Transmission Fluid Check	Every 500 hours
Track & Undercarriage Inspection	Weekly
Cooling System Flush	Annually or every 1,000 hours

Specs Page Only

Can’t Find What You’re Looking For?

Our knowledgeable staff will be happy to help you with any of your tractor, backhoe, dozer, or engine parts needs.

1-800-909-7060 Parts Request Form

Shipping & Return Policy

Do you need your part quickly? You're in luck! We have warehouses all over the country to ensure a quick and easy delivery time. Most of our parts ship from our warehouses the same day you place your order. And many times, orders are delivered in Two to Three days.

Our in house parts are manufactured following strict quality standards in our warehouse in Ohio. Parts such as hydraulic cylinders, pins, bushings, sheet metal, track adjusters, booms and dipper sticks are all ready to ship same day that they are purchased! With less time to wait for your shipment, you will be able to get back to work as quickly as possible.

Did you accidentally purchase the incorrect part? We offer returns and exchanges here at Broken Tractor. To proceed with a return, please call us toll free, and we will provide you with return authorization and a step by step return process for your convenience. We are more than happy to help you exchange your part for the correct one! Give us a call at 1-800-909-7060 and we would be pleased to help you.