hydro boost problem
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Joined: Feb 2014
Posts: 954
Likes: 9
From: Encinitas CA
As a heads up, I realized I could re-use the booster's mounting / backing plate without an adaptor. 3 of the 4 studs on the backing plate lined up with a traditional 3 3/4" (I think) square found on many vacuum boosters. (I ended up removing the fourth stud and adding a new hole with a bolt)
The booster unit's mounting hole was offset and didn't line up for me. But... I realized if I cut out a (about 3 1/2" x 3 1/2") large square around the mounting hole and the square center was offset from the mounting hole cents when I flipped the square I could adjust the offset of the hole. Using this technique, I centered the hole within the backing plate.
I then welded that square back in and smoothed it out with a flap wheel on my grinder. This saved having to buy an adaptor.
Note, the booster also has slots ground in the threaded mounting sleeve. I added (welded and filing) notches back in to the mounting hole to re-index (clock rotationally) the booster unit within the mounting plate.
The booster unit's mounting hole was offset and didn't line up for me. But... I realized if I cut out a (about 3 1/2" x 3 1/2") large square around the mounting hole and the square center was offset from the mounting hole cents when I flipped the square I could adjust the offset of the hole. Using this technique, I centered the hole within the backing plate.
I then welded that square back in and smoothed it out with a flap wheel on my grinder. This saved having to buy an adaptor.
Note, the booster also has slots ground in the threaded mounting sleeve. I added (welded and filing) notches back in to the mounting hole to re-index (clock rotationally) the booster unit within the mounting plate.
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From: brunswick, ohio
