TR2/3/3A Brake and Clutch pedal to MC adjustments?

[PatGalvin]

I'm wrapping up brake and clutch hydraulics on my resto, and don't know how to adjust the pedal to master cylinder connections. The brake and clutch MCs have a threaded-end rod that screws into the fork, through which a pivot pin connects to the brake and clutch pedals. There are two bolts that stick through the master cylinder "sled" with lock nuts - these bolts ride on the top of the pedal tabs, and would adjust pedal height, I guess. So, my questions are:

How do you know how much the fork should be threaded onto the master cylinder threaded rod? and,
How does one adjust the two pedal adjustment bolts to adjust pedal height?

I have stock rebuilt master cylinders and am running the HVDA tranny conversion (so have a hydraulic throw out bearing).

Thanks for the continued wisdom!

Pat

 

[TR3driver]

To some extent, it is personal preference. Adjust the pushrod length to give you the pedal height you like, and adjust the stops to suit. The stops aren't even all that important, they were deleted on later cars, but I like them as they give a way to compensate for wear in the joint. The important part is that the stop not be too tight, there must be some free play with the MC piston fully extended. The Lockheed instructions say .030", which is probably a reasonable number for the Girling setup as well (although mine are probably a bit tighter than that).

 

[PatGalvin]

Thanks Randall

So the free play is the measured gap between the pedal stop bolt and the top of the clutch or brake pedal (where the fork pivot is located)?

Pat

 

[TR3driver]

So the free play is the measured gap between the pedal stop bolt and the top of the clutch or brake pedal (where the fork pivot is located)?

You can add to that whatever play there is in the joint. In my case, the joint has more than .030" of play in it, so my pedal rests firmly against the stop.

See page R4 in the factory workshop manual for the pedal (stop) adjustment. For the Girling MC, you don't need to push the pushrod into the MC, it will be held in contact with the piston by the internal spring.

 

[PatGalvin]

Thanks again Randall. This was very helpful.

Pat