Gudmundur wrote:
It is very important to know if the system is a DOT 3, or DOT 5 system.
DOT 5 fluid is silicone based, and will within about 3 days time, attack
and destroy all the rubber cups used in the brake system

I was just about to say the same thing, except that IMHO 3 days is an
optimistic time estimate.

DO NOT PUT DOT-5 IN YOUR TRAILER BRAKES UNLESS
1- you are ABSOLUTELY positive that's what it's spec'd for.
OR
2- you wanted to replace your whole trailer brake system anyway.


.... SS is correct that DOT 3 is a stupid
choice around water, but about 80% of the surge brake systems I have ever
repaired were in fact DOT 3.

Yep. But it's not that bad, really. Just drain & replace the fluid every
year or so... more often if you look into the reservoir and see it's
cloudy. Back when we had a trailerable I considered it normal trailer
maintenance.

Fair Skies
Doug King