Hi guys - a small problem that you may be able to help me with.
For several years now I have been having problems with my OS (RH) handbrake caliper; the internal actuating cam had a flat, or a wear ridge on it, and would stick on that side without releasing (unless I got out and popped the lever back by hand, not ideal obviously!).
I bought a pair of reconditioned calipers and a new handbrake cable, so nothing was left to chance - the old cable was from my '78 Ti donor, and the return springs were a bit tired.
OK, so this weekend (after a bit of a hassle) I finally had two calipers and the handbrake cable fitted, but although the handbrake engaged satisfactorily, it would not release with the lever.
At first I thought I had the same problem as before, and my heart sank; but on closer inspection it became clear that the roll pin which restricts the movement of the lever on each caliper is actually critical to the operation of the handbrake mechanism - the return springs on the handbrake cable have nothing to react against if either of these pins are missing.
The roll pin on my reconditioned NS (LH) caliper is missing
So instead of each lever stopping on the pin, thereby providing a return force to the other lever, the NS lever simply continued around until there was no more spring force in the cable, leaving the OS caliper stuck on.
I can see the remains of the roll ping in the NS casting, it looks like it has sheared off and no attempt has been made to replace it by the re-manufacturer (Budweg, a Danish company). I can imagine it would be quite difficult to remove the remains of the (sprung steel) pin from the casting, but if the pin is essential to the operation of the handbrake I don't see how this operation can be avoided?
The vendor has informed me that all brake products are covered by a 12 month warranty, but I wanted to confirm that this caliper is definitely not fit for purpose before I send it back - I don't want to lose any more time or money.
So, to the crux of the matter - is my understanding of how the (inboard) Alfasud handbrake mechanism works correct? Or can the lack of a roll pin be compensated for in the adjustment of the brakes (I can't see how, but I might be missing something)?
I can't believe I am going to have to take the rear brakes (the Green Machine uses Alfasud front calipers at the back) apart all over again. This has not been a good year for me