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Ron914 |
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#1
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Member ![]() ![]() Group: Members Posts: 356 Joined: 19-April 22 From: Huntington Beach,Ca Member No.: 26,487 Region Association: Southern California ![]() ![]() |
Hello to all who have helped me with this project . @emerygt350 ,@TJB/914, @Superhawk996 , @ChrisFoley , @rjames , @MDTerp
I am in the middle of rebuilding my MPS and have a couple of comments and questions . First when I opened up the unit I found the most difficult job was removing the rivets holding the two halves together. When I removed the retainer plate to take out the old diaphragm it was in two pieces . ![]() I needed to take two measurements since I was replacing the stop screw , I needed to measure the the stop screw protrusion into the housing . The instruction sheet sent to me by a member had the measurements he must have made when rebuilding his MPS . His stop screw protrusion was 1.97mm and mine only measured 1.72mm. His inner/outer screw assembly depth in the old diaphragm measured 6.51mm . Here's one of my questions ? when I measured mine I got two measurements depth to inner/outer screw assembly was 4.03 and depth to the washer outside the inner/outer screw assembly was 5.46mm. Again there is a difference and since mine was never accessed before (epoxy over screw was not disturbed) is the difference in measurements ok and which measurement should I use I will try to attach a photo or two to help with my question. this one . ![]() I have not touched either of these measurements yet and awaiting any help/comments. I think it's this one to the washer on diaphragm . ![]() |
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JeffBowlsby |
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#2
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914 Wiring Harnesses & Beekeeper ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 8,967 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None ![]() ![]() |
Just a heads up, there are other places the MPS cases may leak besides the gasketed locations. If vacuum loss still occurs investigate/repair these also. Methods I have used:
-Case to outer plastic 4-pole harness connector interface. Run a line of superglue around this joint. -Check valve at internal port, back of case. Not much to repair here, but replace the check valve if you have a donor MPS case. -Center-most adjustable screw (inner screw) to outer screw at the center of the diaphragm fixture. Add a small dollop of grease over the slotted screw head to seal the threads, grease will get sucked into the threaded joint if there is a vacuum leak. -Joint interface between the pleated diaphragm and its center threaded pressed on fixture. Run a line of superglue around this joint. |
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