Re: CAUTION ON THE USE OF SILICONE BKAKE FLUID IN ESAMATIC BRAKE SYSTEMS

Posted by Peter Packard On 2007/9/19 3:33:50

Hi Packard V8, I just spent 30 minutes drafting a great reply to you about your last three replies then lost the lot when I ran out of your threads, then lost it all. Oh the joy of computers!
Bikes? I am not sure about what green eggs are but I guess that they are Army bikes. I have a 1917 Excelsior Model (1000cc) ex US army, a 1927 Harley J ex army (1000cc), a 1939 Harley WLJ 1200cc, ex Japanese army (repatriated from Sumatra in 1985), a 1941 Indian 741B outfit ex Australian Army . The closest thing to your 48 Chief is my 1928 matchless X3 (1000cc) in which I am running 44 Chief rods, rollers and a hand made crank pin.
You are so right in that the compensator valve appears to be a very crude tipping device and I was very surprised that I achieved the lock-up problem. The trouble-shooting suggested seal swell so i changed the fluid and it has worked since. I am a great believer in "if it aint broke - don't fix it" I did replace the compensator valve with a NOS part when I put the reconditioned vacuum unit in.
You are most probably correct that it it is a Treadle Vac unit and I am not fully up to scratch on the fitments of a 56 You are also correct in that the compensator seal simply sits against a face, but once you have pressure in the master cylinder doesn't the pressure force a pressure seal on the Compensator valve until the master cylinder piston tips the compensator valve rod, to release the pressure? What do you think? Best regards Peter Toet