Posted by JD Seller on June 15, 2013 at 00:20:50 from (208.126.196.144):
Diesel: That tool is a joke!!!! It is NOT the correct tool to remove the cam ring screw. They are a BRISTOL screw. This means they are a straight spline. The CHEAP Torx wrench machined down still has tapered sides. IF your cam ring screw is real tight that JUNK tool will explode the head of the screw. May even twist it off in the cam ring.
Since you ordered this from Stanadyne it is all they offer to use officially. Before you try to remove the cam ring screw take a smaller pin punch that just fits inside the head of the cam ring screw. Give the punch/screw a sharp hit or two in the bottom of the bristol splines. This will usually help break them loose.
I have a regular Bristol Wrench set and a guide that screws around the cam ring screw. I still have them break every now and then. When they break you may scrap the cam ring.
This screw has NOTHING to do with John Deere. All of the Roosa-Master/Stanadyne DB pumps used this type of cam ring screw.
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