[TR] Brake master cylinder and bleeding the brakes.

[Wayne]

I'm 99% sure that I have the seal installed correctly.
My problem is that the fluid will not "gravity bleed" like
the rear brakes did. Seal does not come into play here, but if the
piston is stuck to the rear of the bore, this cut off the port from the
resevior and will not let the fluid pass through to the lines.
I plan to remove the MC and see if the piston is stuck.
Would it make sense to try to polish the bore to a mirror finish?
What would I use to achieve this finish?
Or am I wasting my time, and I should just spend the cash and get a new 
girling MC?

Wayne
73 TR6
----- Original Message ----- 
From: "dorpaul" <dorpaul at bellsouth.net>
To: "Wayne" <rengrave at verizon.net>; <triumphs at autox.team.net>
Sent: Saturday, September 12, 2009 11:48 PM
Subject: Re: [TR] Brake master cylinder and bleeding the brakes.


> Wayne...
> Wouldn't a MC that had been rebuilt w/ the seal accidentilly turned 
> backwards also cause crazy behavior with the piston (like you describe). 
> But then again, what do I know about brakes?
> Paul
>
> ----- Original Message ----- 
> From: "Wayne" <rengrave at verizon.net>
> To: <triumphs at autox.team.net>
> Sent: Saturday, September 12, 2009 6:59 PM
> Subject: [TR] Brake master cylinder and bleeding the brakes.
>
>
>>I think I need a new brake master cylinder, I rebuilt the old one but I 
>>was
>> not happy with the
>> bore surface finish after I honed it. The finish was not very smooth and 
>> when
>> I assembled
>> the plunger and new seals, I pushed the piston in and it would just sit
>> there.
>> I had to bang it on the work bench to send the piston back to the front 
>> of the
>> bore.
>> I had plenty of brake fluid in the bore when I assembled it but it still 
>> would
>> not return
>> to the front of the bore on it's own.
>> I was hoping it would move once it was flooded with fluid on the car,
>> but.........
>>
>> I managed to bleed the rear brakes with gravity, however the front brakes
>> would not bleed,
>> I tried pumping the pedal (which didn't feel right) and the fluid in the
>> reservoir would not
>> go down.
>>
>> I think the piston is stuck at the rear of the bore in the master 
>> cylinder and
>> therefore is blocking
>> the fluid from the reservoir to the piston and the pipes. When I push the
>> pedal I'm not feeling
>> resistance. it's not a smooth travel.
>>
>> I thought the PDWA could be blocking the fluid, but I think it lets fluid 
>> go
>> by no matter where
>> the shuttle is located inside it.
>>
>> So, I think it's time to order a new M/C.
>> Any suggestions where I should go? TRF, Moss, BRNW or have mine rebuilt 
>> by a
>> pro?
>>
>> Wayne
>> 73 TR6
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