vacuum assisted brakes

belgiumbarryMember

if i'm right , there seems to be 3 places were vacuum can be lost if ofcourse the check-valve is working properly and the casing isn't corroded trough

.

1) at the "seal-valve" inside, one opens at braking...if that doesn't close all the time 100 % , could be the problem

2) at the brake cilinder connection ( rubber seal ? )

3) ofcourse the diaphram itself...

4/9/143:27 AM

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panteradougMember

The diaphram itself seems to have a life expectancy of 40-45 years.

Mine was broken through the "crease" in three or four places.

4/9/143:42 AM

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belgiumbarryMember

Would it be a good ? idea to spray some WD40 at the air inlet = at the brake padel pushing rod entry... and pumping brakes with engine running .
Just to get that inside seal-valve a bit misty oiled ???

4/9/144:12 AM

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panteradougMember

Typically the rubber components in these assemblies do not like petroleum based substances. They tend to swell the rubber and do not lend to lubrication properties at all.

You want to keep petroleum based fluids away from the diaphram as well as brake fluids.

The boosters do not need lubrication.

They have internal components that are made from naturally slick materials.

So the answer is no, it is not a good idea. If they are holding a vacuum, leave them alone.

4/9/144:24 AM

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belgiumbarryMember

quote:
Originally posted by PanteraDoug:
Typically the rubber components in these assemblies do not like petroleum based substances. They tend to swell the rubber and do not lend to lubrication properties at all.

You want to keep petroleum based fluids away from the diaphram as well as brake fluids.

The boosters do not need lubrication.

They have internal components that are made from naturally slick materials.

So the answer is no, it is not a good idea. If they are holding a vacuum, leave them alone.

Ok , Sir, i won't do it

4/9/144:25 AM

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