I have a parts catalog for the 240 tractors and the hydraulic pumps were made by two companies. One as noted earlier is made by Thompson while the other is made by Pesco. The main difference is the location of a check ball and spring. The IH part no. of the Thompson pump is 368633R91 while the Pesco pump is 368894R91 both of which might have been superseded since my catalog was printed in April 1960. The internal parts you are noting are not shown or identified as they are part of the vendor supplied pump assemblies. Either pump you can locate will interchange with the other as they are optional to get other. The front pump shaft oil seal is the same for both pumps and is p/n 353183R91. From your photo and the illustration in my part catalog I believe you have the Thompson model on your tractor and the IH service package for that pump is p/n 368634R91 and will consist of several parts mainly the noted oil seal, some O-rings, washers and a gasket. The gears and bearing you make note of are not listed in the catalog and as I stated are part of the vendor supplied pump assembly. This most likely isn't much assistance to your immediate problem but might aid you if looking for another pump. To repair your existing pump will most likely require the services of a facility who specializes in such repairs and servicing of hydraulic system components, Hal.
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