Re: ANOTHER #%*!:( BTV failure
Posted by HH56 On 2010/10/3 20:36:39
KevinAZ, what are you calling the check valve pathway? There is only the one residual check valve at the end of cylinder where it exits to the brake line.
Where I believe the problem lies in most cases is in the compensator valve. That one blob of rubber and the seal around the assemby is the only thing that prevents fluid from going back into the reservoir. When the piston goes forward, the spring is supposed to pull it back straight, keep it upright tightly and then pressure supposedly keeps it seated. Anything that prevents that and having a strong seal from that blob such as some floating debris allows the fluid to seep back into reservoir. Slowly like yours or fast like rowdys.
One thing that is interesting is the fluid in the relief port in your pict 8041. Unless some was spilled into it when removing the compensator valve, that passage should be dry unless the main piston rod seal is leaking severely.
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Where I believe the problem lies in most cases is in the compensator valve. That one blob of rubber and the seal around the assemby is the only thing that prevents fluid from going back into the reservoir. When the piston goes forward, the spring is supposed to pull it back straight, keep it upright tightly and then pressure supposedly keeps it seated. Anything that prevents that and having a strong seal from that blob such as some floating debris allows the fluid to seep back into reservoir. Slowly like yours or fast like rowdys.
One thing that is interesting is the fluid in the relief port in your pict 8041. Unless some was spilled into it when removing the compensator valve, that passage should be dry unless the main piston rod seal is leaking severely.
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