A few years ago i bought a used 4 year old bagger. The brakes were a little spongy, so i decided to change the fluid. i was amazed to see the free water in the system! I measured it, and there was 1/2 oz of free water in the system.

I knew the guy i bought it from, and it was never in a flood or anything like that, garage kept at night. We live in the prairies, so it is not a wet enviroment even.

 

No need to open the master cylinder. Also, when you're done cleaning the pistons, the seals will be dry. Use a q-tip and apply oil to the rubbers. Lubrication is key.

 

Do not use any petroleum products on any brake components ever.

I think he meant he cleaned the outside of the pistons before pushing them back into their bores.

 

I use 3M brake cleaner it doesn't damage seals...

 

+1 on changing break fluid. With speed bleeders it's so easy there's just no good reason not to.

 

Let me enlighten you on the subject of brake fluid .... brake fluid is hygroscopic which means that it can ( and will ) absorb moisture from the atmosphere ... that moisture is 1. Corrosive and 2. heavier that the brake fluid. 3. The water has a lower boiling point than the brake fluid hence the water overheats and evaporates which leads to air in the system which in turn give poor brake performance .... YES YOU NEED TO SERVICE YOUR BRAKE FLUID REGULARLY !!
http://www.stoptech.com/technical-su...rs/brake-fluid

 

good info here!!

 

Fresh brake fluids do perform better...

 

Thats what kills the brakes on many Corvettes....

 

Yes Sir ree ... I did a lot of caliper rebuilds ( with stainless steel inserts ) on Corvettes because of old contaminated ( from moisture ) fluid from sitting in the garage for months at a time.