rebuilt brake booster doesnt work

[aeromech]

The pump should shut off when it reaches a certain point of vacuum. I’m guessing you have a substantial leak somewhere
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Lead Mechanic: San Diego Air and Space Museum
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Boeing 727,737-200-300-400,757,767
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[Cptn. Calzone]

yes I agree
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71 westfalia
67 912 Porsche Quintilla
67 Single Cab aka my work horse

[Cptn. Calzone]

could be the o ring on the ATE master isnt big enough..or I somehow torqued the booster upon installation
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71 westfalia
67 912 Porsche Quintilla
67 Single Cab aka my work horse

[lil-jinx]

try running the pump ,while searching with a cigar or other smoke producer,the smoke should get drawn in.
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https://www.thesamba.com/vw/forum/viewtopic.php?t=620186
https://www.thesamba.com/vw/forum/viewtopic.php?t=668799
1974 Bay Westfalia. she likes to be called Ethel.
1968 Dune Buggy sold dec 2024

1974 parts bus
A smart man learns from his mistakes,a very smart man learns from other's mistakes.

[Cptn. Calzone]

great Idea! I attempted to do just that with sage( chasing all bad vibes too!!) However the old pump gave up the ghost..!! Saw the new pump and checked out!! New in tommorrow then test then we know
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71 westfalia
67 912 Porsche Quintilla
67 Single Cab aka my work horse

[orwell84]

I’ve never used a vacuum pump and would be more inclined to tap the intake to use engine vacuum. But since you’ve got the new pump, try it.

I recently installed a new brake booster and found that it took some fiddling to get the master cylinder to seat squarely on the brake booster. It wasn’t either of the parts, just the challenges of lining it up in a confined space. I’m not sure what your intake system is, but I run original dual carbs with an auto so there were a lot of potential leaks to chase down first. Hope the new pump solves your issues.

[OB Bus]