ford 1900 4wd

[jackgas]

Hi, I recently purchased a ford 1900 for snow removal because my neither of my other tractors have a cab. The previous owner replaced the 2 front turf tires with r4 tires.
To me, it appears the tractor doesn't sit right (front looks high) and I don't believe he has installed the correct tire size. I am having issues finding what is supposed to be on the tractor. it is a 1981 ford 1900 4wd. Right now it has 13.6-16 turf on the back and he has installed 27 10.5 15 industrial tires on front. I don't want to break any gears and I need some help. The dealer doesn't know.
Can anyone tell me what is the correct tire size on this tractor?

Thank you,

 

[zoedog2012]

Check out the Titan Tire site. They have lots of information and also a work sheet that you can fill out to determine the correct size. Very easy to use, plus great info on tire usage.

 

[MOTractor]

This link might help, from tractordata.com

 

[jackgas]

Thanks guys, titan tire is definitely added to my favorites. Its a pretty cool resource, but I couldn't find what I was looking for . I emailed someone there and haven't heard back. Tractordata.com is one of my favorite all time sites. Unfortunately, they don't have the specs on my tire sizes either. I really appreciate the responses though. Even the parts guy at the local newholland dealer isn't quite sure what belongs on my tractor. I think the oem information covers 1900,1910 and 1700 with 2 and 4wd on (all models)with different options on tires for each (all options). it doesn't state x turf front, y turf rear on 4wd. hence my dilemma. They just list a pile of tire sizes.
I cant comprehend why this basic information isn't readily available..
Thanks folks, I will post my answer when I find it, hopefully I can help someone else with the same issue