I attended the ATR auction a few years ago and obtained a few boxes of their Black anodized billet aluminum adjustable pressure regulator tops.
I have offered these on the parts for sale section and some folks were asking if directions were available so here we go.
KEEP REGULATOR INLET AND OUTLET COVERED/SEALED WHILE PERFORMING ALL WORK!! I had some of those soft plastic caps on hand put one over the fuel inlet and outlet I would at this time remove the o ring.
1) Before you cut clamp the top of the regulator as shown in the picture.
I used my Dremel cut off tool maybe a large tubing cutter would work; cut top off of regulator approx. 1/4 inch down from top. A hacksaw might work but I would hate to have to do it that way. Do not cut too deeply, remember there is a spring in there. Try not to damage, dent or bend housing. Inspect the inside of the regulator, look for tears or holes in the diaphram.
I poured some light solvent oil into the camber and let it sit for 30 min, to make sure there were no leaks (see photos)
2) Place the spring back into the lower regulator and place a "cap" on top of the spring before pressing ATR top on. I found a suitable cap at the hardware store they were chrome hole covers another option is a freeze plug a 1in. to 1 1/8 will work. (see pic) (WARNING: The ATR cap is a press fit and very difficult to remove if you do a "trial" fit.)
I have offered these on the parts for sale section and some folks were asking if directions were available so here we go.
KEEP REGULATOR INLET AND OUTLET COVERED/SEALED WHILE PERFORMING ALL WORK!! I had some of those soft plastic caps on hand put one over the fuel inlet and outlet I would at this time remove the o ring.
1) Before you cut clamp the top of the regulator as shown in the picture.
I used my Dremel cut off tool maybe a large tubing cutter would work; cut top off of regulator approx. 1/4 inch down from top. A hacksaw might work but I would hate to have to do it that way. Do not cut too deeply, remember there is a spring in there. Try not to damage, dent or bend housing. Inspect the inside of the regulator, look for tears or holes in the diaphram.
I poured some light solvent oil into the camber and let it sit for 30 min, to make sure there were no leaks (see photos)
2) Place the spring back into the lower regulator and place a "cap" on top of the spring before pressing ATR top on. I found a suitable cap at the hardware store they were chrome hole covers another option is a freeze plug a 1in. to 1 1/8 will work. (see pic) (WARNING: The ATR cap is a press fit and very difficult to remove if you do a "trial" fit.)