Brake Servo- Booster air valve spring

C

Carlos

Member
#22
#22
SydneyRoverP6B said:
You are right; the brake booster never originally came with a second coil spring beneath the air control housing. Later, a modification spring was installed as it was found that the brakes could remain on, particularly after light brake applications. The inclusion of the modification spring eliminated the problem. The springs could be purchased a few years ago, I recall.

Ron.
Click to expand...
Thanks Ron, that explains why some booster didn't come with the big spring. I've sourced one from a garage and will install it.
 
C

Carlos

Member
#23
#23
Sorry to bother you, but I have another question:
I took off the tiny piston in the air valve.
The piston comes with only one rubber seal, as you can see in the photo.

Is the seal installed correctly or has to be installed the other way ?
In another forum ( Landcrab ), the piston is in the ¨other way¨ ( see photo nr 2 )

Thanks you all for your interest.
 

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cobraboy

cobraboy

Well-Known Member
#26
#26
Comparing those two seals is akin to comparing apples and oranges.
The first is a single lip seal, the wide end must always face the brake fluid. The second looks like a double lip seal, this has the potential to be fitted either way round. I do not beieve the piston groove choice is important.
 
C

Carlos

Member
#27
#27
cobraboy said:
Comparing those two seals is akin to comparing apples and oranges.
The first is a single lip seal, the wide end must always face the brake fluid. The second looks like a double lip seal, this has the potential to be fitted either way round. I do not beieve the piston groove choice is important.
Click to expand...
Thanks Cobraboy.
Quite true the they are different...but both are valve piston rubber seals.
I would say comparing oranges and tangerines...:hmm:
 
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