Tractor Forum banner
1 - 7 of 7 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter · #1 ·
I am looking at buying either the JD 4052R or 4066R. I believe the both have the same engine but have not been able to find out if this is true. Also if it is the same engine is it just though programming that they are able to get the higher HP out. Does anyone know or could tell me how to find out other than asking my local JD dealer
 

·
Premium Member
Joined
·
12,412 Posts
Welcome to the forum George! Glad to have you. Have you checked tractordata.com and do a comparison?
 

·
Premium Member
Joined
·
2,675 Posts
They both use Yanmar engines, but are different models and specifications of the Yanmar 2.9 liter engines. The lower power unit is designed to make rated power at 1,800 rpm, and the higher power engine is tuned to develop its rated power at 2,600 rpm.

If you were to go to the John Deere parts catalog and compare internal part numbers, you will find differences in the fueling systems, camshafts, and electronic engine controls among others.
 

·
Premium Member
Joined
·
12,412 Posts
Thanks RC! I know that most all the john Deere engines of a certain horse power, say 50 to 80 horse power, are all 3 cylinder engines of the same size with I think 3 liters displacement, but vary wildly on the horsepower, so there's obviously something going on there as you say.
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #6 ·
They both use Yanmar engines, but are different models and specifications of the Yanmar 2.9 liter engines. The lower power unit is designed to make rated power at 1,800 rpm, and the higher power engine is tuned to develop its rated power at 2,600 rpm.

If you were to go to the John Deere parts catalog and compare internal part numbers, you will find differences in the fueling systems, camshafts, and electronic engine controls among others.
Thank you for helping me answer my question
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #7 ·
Thanks RC! I know that most all the john Deere engines of a certain horse power, say 50 to 80 horse power, are all 3 cylinder engines of the same size with I think 3 liters displacement, but vary wildly on the horsepower, so there's obviously something going on there as you say.
Thanks for your help now I can make a more informed decision
 
1 - 7 of 7 Posts
Top