I've never had good results with DOT-5 silicone-based brake fluid in any ground vehicles. Maybe seals in A/C brake systems are compatible with it, but in the (one each) motorcycle and car I used it in, the seals dragged which in turn caused the pads to drag on the disks. Aircraft brakes are not too good at "bouncing" the pads off the disks during rotation, the way it works on ground vehicles, to begin with. The pedal height / lever travel was inconsistent too, no doubt due to the pistons in the master & slave cyls sitting in varying positions after letting off pressure on the lever. When I used it the systems were flushed, disassembled and dried before adding the DOT-5, so mixing of any amount of DOT-3 and DOT-5 was not a factor. Likewise, when going back to DOT-3, everything was flushed, disassembled, and dried. The seals were undamaged and not replaced, and once DOT-3 was back in the system, everything worked fine. This being said, I wouldn't use DOT-3 in an A/C due to its eagerness to grab and retain moisture.
Chris On 11/11/2014 10:27 AM, Jeff Scott via KRnet wrote: > If MIL-5606 Hydraulic is exceedingly expensive or difficult to get in Europe, > DOT-5 Silicone based Brake Fluid is an acceptable replacement fluid. Just > don't ever mix the two, and if you change from one to the other, the system > has to be flushed clean. > > -Jeff Scott > Los Alamos, NM > > >> Stef wrote: >> >>>> Can one of you tell me can I use on the fitting to the cylinder teflon >> tape Or do we need loctite...and what kind of loctite do I need. We have >> Matco brake cylinders. And the oil, can we use normaal car stuff dot4?<< >> >> I think best practice is to use something like Henkel/Loctite 567 thread >> sealant for tapered hydraulic fittings, and it also works for fuel and oil >> connections. MIL-H-5606 hydraulic oil is what most aircraft use for brake >> fluid, and I'm pretty sure that applies to Matco as well. Aircraft Spruce >> sells it, and I'm sure it's also available in Europe. Dot 4 fluid isn't >> compatible with the types of seal material used for the MIL-H-5606. See >> http://www.kilohotel.com/rv8/article.php?story=20080525201121619&mode=print >> for more on that...which involves swapping out the seals, but it's >> possible... >> -- >> Mark Langford >> ML at N56ML.com >> http://www.n56ml.com > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > >
