Many owners have used the following, as I will probably do in the spring:
http://www.grainger.com/Grainger/productdetail.jsp?xi=xi&ItemId=1611769948&ccitem=
In case you cannot see this link it's Grainger catalog number 4F667 for a John F. Barnes pump model 1800290. I got this information fron the Ingersoll group in tractorforum dot com. Depending on year of tractor you may have to change your coupler for a 3/4 inch. Some tractors had 5/8 which no one supports anymore.
There are usually used Case-Ingersoll pumps on e-bay but the new one is only $175.
http://www.grainger.com/Grainger/productdetail.jsp?xi=xi&ItemId=1611769948&ccitem=
In case you cannot see this link it's Grainger catalog number 4F667 for a John F. Barnes pump model 1800290. I got this information fron the Ingersoll group in tractorforum dot com. Depending on year of tractor you may have to change your coupler for a 3/4 inch. Some tractors had 5/8 which no one supports anymore.
There are usually used Case-Ingersoll pumps on e-bay but the new one is only $175.