Measuring Drawbar pull

[Shell Farm]

Simple to modify hydraulic cylinder with psi gauge to measure lbs of pull exerted by tractor when pulling.
Can determine DB horsepower if speed is determined mph and convert to ft/min.
1 HP is 33000 ft.lbs/minute

 

[Hay Dude]

Looks like you have 71.93 DB HP according to Tractor Data

TractorData.com John Deere 4010 tractor information

www.tractordata.com

 

[Jerry/MT]

Simple to modify hydraulic cylinder with psi gauge to measure lbs of pull exerted by tractor when pulling.
Can determine DB horsepower if speed is determined mph and convert to ft/min.
1 HP is 33000 ft.lbs/minute

If you go to the Nebraska Tests, et al, they usually can provide this info. This data is based on tests conducted on a concrete pad.
Using the piston/air pressure method you can do this for the soil conditions you are operating in.

 

[Hay Dude]

Or just enter your tractor model into the Tractor Data website. They use NT in their tests.