Introduced in the late 1980s and early 1990s, the John Deere 9400–9500 series combines were a component of the company's 00 Series of self-propelled combines. Particularly for small to mid-sized agricultural operations, these machines were renowned for their dependability, simplicity, and strong performance.
Below is a summary of the main models:
John Deere 6.8L 6-cylinder diesel engine, part of the 9400 Series combiner
About 150–160 horsepower
Tank for Grain Approximately 180–190 bushels is the capacity.
Threshing System: Four straw walkers in a traditional walker-style divider
Smaller businesses with less land are the intended use.
Compatibility of corn heads: up to six rows
Strengths: Easy to maintain, simple design, suitable for soybeans, oats, and wheat
John Deere 7.6L 6-cylinder diesel engine for the 9500 Series combiner
Grain tank capacity: around 200–210 bushels; horsepower: 190–200 HP
Traditional threshing method with five straw walkers for increased capacity
Corn Head Compatibility: corn heads with six to eight rows
Improvements over the 9400 include increased capacity, cleaning space, and power.
Popular for: Mid-sized businesses; extensively used in small grains, maize, and soybeans
The original creators deserve all the credit! I just made the conversion!
Part Two of My Older Combine Series Is Here!

The North Woods Farmer is credited.