TheSamba.com :: View topic

Wed Mar 15, 2023 2:35 am

My NOS one for reference

Wed Mar 15, 2023 8:12 am

Cool
Any sign of seal 25?

Looking for a source for that lid rubber seal 24, if anyone has one

Wed Mar 15, 2023 10:35 am

Two gaskets stacked? Thats unusual.

Wed Mar 15, 2023 5:10 pm

I'm wondering if it's metal too since it's not black

Thu Mar 16, 2023 12:53 am

I wonder if this has something to do with helping to undo the cap. The aluminium caps are known to really freeze solid. Add brake fluid and moisture and a rubber seal. 2 layers of seals may help in reducing friction.

That NOS master cyl. must be one of the ultimate BD/WB collectibles ! It should be displayed at a museum !!! It is just so strikingly beautiful ( along with the design of the original ATE boxing) :!: :oops:

(total nerd mode).

Thu Mar 16, 2023 1:36 am

I think it looks cool too 🙂
What’s people’s advice to stop the lid seizing?

Thu Mar 16, 2023 2:23 am

100% agree, stunning, get that into a display case 8)

djfordmanjack wrote: I wonder if this has something to do with helping to undo the cap. The aluminium caps are known to really freeze solid. Add brake fluid and moisture and a rubber seal. 2 layers of seals may help in reducing friction.

That NOS master cyl. must be one of the ultimate BD/WB collectibles ! It should be displayed at a museum !!! It is just so strikingly beautiful ( along with the design of the original ATE boxing) :!: :oops:

(total nerd mode).

Thu Mar 16, 2023 2:32 am

In general I like to use Liqui Moly copper grease ( or any other brake caliper copper grease) just make sure you just put it only on the cap and cup threads, and under no circumstance, let it get into/ mix it with brake fluid ( alcoholic based DOT3)!
You can lube the rubber seal with any good conventional brake cup assembly paste ( I like to use og ATE).
Or you can do away with it all and used DOT 5.0 silicone brake fluid. I have done it many times and works great, but you have to make sure to either clean out/flush the entire system thoroughly from old DOT3 brake fluid, or assemble with all completely new brake parts ( cylinders, hoses and lines) to be safe.
It is great ! especially when using rare and precious NOS components, and on cars that are mostly garaged and rarely driven. From my own experience I have to say it is recommended to also replace DOT5.0 every 5 years or so, because, on an open circuit ( all our old master cylinders have a breather cap), dampness can and will get into the system as well, and with silicone, it will not mix with the brake fluid, but instead collect at the lowest points ( wheel cylinders). I like to use Harley Davidson DOT5.0 silicone.

RockStock wrote: I think it looks cool too 🙂
What’s people’s advice to stop the lid seizing?

Thu Mar 16, 2023 4:30 am

RockStock wrote: Cool
Any sign of seal 25?

nope, only the # 24 seal