bob turner
Registered User
I started this on another thread, but the title is misleading. I have checked everywhere, and cannot find anything that restricts me to Mil H 5606. In fact, I found that one can purchase DOT 5, an automotive product with superior characteristics, under MIL PRF 46176B.
So if the only thing that makes 5606 ok for aircraft is its Mil Spec, then I am guessing that DOT 5 would likewise be OK. My 5606 cans say nothing about PMA.
The advantages of DOT-5: non-hygroscopic (no more corroded master cylinder parts; no more pitted caliper bores), non-flammable (5606 is highly flammable, not sticky when it sits around (5606 clogs valves on light plane brakes) and it won't eat paint. I think it is compatible with any kind of rubber, but I know for sure that it works in those Scott and Hayes products, and the Cleveland O-rings seem to handle it just fine.
Any opinions as to what's actually legal?
So if the only thing that makes 5606 ok for aircraft is its Mil Spec, then I am guessing that DOT 5 would likewise be OK. My 5606 cans say nothing about PMA.
The advantages of DOT-5: non-hygroscopic (no more corroded master cylinder parts; no more pitted caliper bores), non-flammable (5606 is highly flammable, not sticky when it sits around (5606 clogs valves on light plane brakes) and it won't eat paint. I think it is compatible with any kind of rubber, but I know for sure that it works in those Scott and Hayes products, and the Cleveland O-rings seem to handle it just fine.
Any opinions as to what's actually legal?