RE: Perry Pumps and regulators
George,
Webra, right choice
When you look at the backside of the black (nylon?) bottom, you see the adjustment screw of the pressure regulator. On both sides of the screw there are little holes, see the green arrows on the picture 1.
For us this was an indication these holes are probably to position the regulator when fastening the pump/regulator in the aluminum housing.
For that we did try to screw open the aluminum insert out of the housing, see picture 1.
There is a fine thread used to mount these two parts together with all the internals in it as a sandwich.
It was possible without any tool to open the surprise, but when not possible by handcraft try by rotate the aluminum inside with a tool but protect the material with a piece of cloth or else.
Be careful with the fuel connections and DO NOT REMOVE THEM.
When you can open the housing the inside parts you can assist to come out by blowing on the crankcase side of the housing. (Hanna’s suggestion, see is the physicist I am the engineer!)
For the diaphragm you have to unscrew the little nut and remove the valve to separate the diaphragm from the valve seat part.
After the diaphragm is separated you also can remove the screw and two metal plates from the diaphragm. Take attention for the position of the valve on the screw.
The valve is mounted between two nuts and it is good to give the valve the same position when mounting the new diaphragm, because of the “work point” (compensation of the proportional fault of the regulator! LOL)
Success, and we are interested in the progression and if we can help, ask.
Hanna and Cees