Rob probably has greater experience on this. For what it is worth:
The Cleveland O rings are compatible with DOT3 in my experience. Seems like I change them out every 8 years or so, with no leaks. I have been led to believe that the seals/O rings in the master cylinder are not compatible with 5606. I defer to the service recommendations. On Mon, Jan 4, 2021, 5:18 PM Kurt Redinbaugh <[email protected]> wrote: > Thank You Rob for your prompt response on my brake caliper question. > I am a bit confused though... > On pp44 of the HOFFMANN AIRCRAFT "instructions for continued > airworthiness" it emphatically states that DOT 3 brake fluid is used and > that MIL-5606 is NOT to be used. My brake reservoir had a red tint to it > when I put S/N 3660 back into service after 12 years as a hangar queen. > Last week I had a leak that drained the reservoir full of DOT 3. The > airplane is tied down on the ramp at the Reno-Stead airfield and is > completely covered. The weather has been freeze-thaw cycles lately. The DOT > fluid I used was fresh and stored in a factory sealed container. I have > ordered O ring number 101-02300 from Aircraft Spruce to replace the failed > seal in the caliper. > I have seen in the DOG that MIL-5606 fluid is to be used. Is there an > explanation for this seeming contradiction? > As always thanks for your support > Kurt >
