Brake fluid?

[machinist]

When I took an auto repair class the teacher said that brake fluid had the ability to absorb atmospheric moisture so I would be careful with it and not use any from an old dusty previously opened can.
Of course he did tell stories so I dunno if it is true.

[katana]

Originally Posted by machinist

When I took an auto repair class the teacher said that brake fluid had the ability to absorb atmospheric moisture so I would be careful with it and not use any from an old dusty previously opened can.
Of course he did tell stories so I dunno if it is true.

Hi Machinist,
welcome to the forum....your teacher is correct. Brake fluid is hygroscopic....which means it will absorb water/moisture....this is one of the reasons that brake fluid (in a vehicle) should be changed every 2 years or so.

Regards David

[fernando]

Welcome to the forum, Machinist

[Gavin Nugent]

Originally Posted by machinist

When I took an auto repair class the teacher said that brake fluid had the ability to absorb atmospheric moisture so I would be careful with it and not use any from an old dusty previously opened can.
Of course he did tell stories so I dunno if it is true.

Welcome Machinist,

This is of course very true if it is left to sit but even if it has been sitting on the shelf.
If I remember correctly from my tech classes as a teenager, the moisture absorbed accounts for rust found in some braking systems and also loss of some pedal as water compresses more under pressure?? It has been a long time since these classes.

You can use it though, it still will complete the task at hand and as suggested in the post, once part of the task is completed, move to part two, the WD wonderful application and disperse all of the concerns and of course then let it all dry.
After following suggestions in the thread provided, I have also gone through the scabbard again after this with a pull through and oiled flannel cloth to ensure all is ok.

Gav

[machinist]

Thanks for the welcome guys.
I am often here but often quiet.