Quote:
Originally Posted by Diesel911
This is a picture I copied from someone. Showing the old and new roller setups.
Not shown on the even earlier then the "Old" one in the picture the bearing cages were made of plastic. And the plastic cage over time falls apart.
You will have to ask someone if on the newer one there is a bearing inside of the roller or if the roller just rides on the steel shaft.
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The pump you're showing is for a 60x engine. They did get a design revision in the early 90s and yes, they still have a ball bearing, but encased between steel washers to contain carnage if the cage comes apart. Not sure this redesign ever made it to the 61x engines since they were long out of production by the time the redesign made it to the 60x series.