Int. 135 motor / replacing oil pump spring

marlin54 · Sep 1, 2020

So as long as I had oil pan off I dropped oil pump and am replacing the oil pump spring and thought there was supposed to be a spring and ball but instead I have a spring that fits inside this plunger. So its a International 340 utility with a 135 cubic inch gas motor. Is this the correct parts for this pump and does this replace the ball and spring style ? did international ever use the old spring and ball style or did they allways have this style? if I new that it had this plunger style I would have saved myself the 8 dollars and just put some small washers in it and stiffened up the spring for more pressure. thanks

d rushlo · Sep 1, 2020

that is the stile ih used on them oil pumps . make shure that the base on the pump is flat if not it will push oil out the sides instead to the brg.they take real thine gsk.if your base is to bad to get flat i do have them rebuilt to flat.

MARK ROBKE · Sep 1, 2020

Back in the late '70s, maybe early '80s, Dad's 340u broke the crankshaft. The engine had been overhauled a few years earlier, but always had low oil pressure and almost none at idle, even before the overhaul. While we had the pan off I added a few thin washers behind the oil pump spring, and that raised the oil pressure to the proper range. Mark.

pete 23 · Sep 1, 2020

Always a spoiler in the bunch, right. Adding shims may cause the spring to completely compress coil to coil with cold thick oil, cause that cover to get excessive strain , warp and blow gasket.

Actually, I always try cover (after it is straightened out) with no gasket and if pump turns nice and free you are good to go. Gaskets are only a few thousands thick and you use as many as it takes to make pump turn with no drag.

A bit of shellac is fine if you don't need a gasket.

Int. 135 motor / replacing oil pump spring

marlin54

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d rushlo

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MARK ROBKE

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pete 23

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