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+--- Thread: Curious threaded hole in 3 speed G/B (/showthread.php?tid=1372)
Curious threaded hole in 3 speed G/B - Erich - 22-06-2018
As a newbie with an Ulster Rep, I have found a few things that should be there but are not, including the screw that fits between the bushing on the dizzy. I also have found a threaded hole on the OS rear of the 3 speed box. What is this for and should there be something there?
Erich in Seattle
RE: Curious threaded hole in 3 speed G/B - Ruairidh Dunford - 22-06-2018
(22-06-2018, 04:09 PM)Erich Wrote: I also have found a threaded hole on the OS rear of the 3 speed box. What is this for and should there be something there?
Erich in Seattle
Your gearbox is from an earlier car Erich - that hole takes the spigot for the uncoupled handbrake ratchet.
RE: Curious threaded hole in 3 speed G/B - AustinWood - 22-06-2018
The 1/2" BSF hole in the gearbox is for the handbrake ratchet anchor as used on split braked cars. The handbrake with coupled brakes is completely different. Perhaps your special has a redesigned linkage too.
I don't know what dizzy hole you are referring to. Oiler perhaps?
RE: Curious threaded hole in 3 speed G/B - Erich - 22-06-2018
Thank you Ruairidh and Jim. I was afraid I might have been a missing a screw that anchored the end of a shaft.
Jim, the hole on the dizzy I was referring to, is the one that is on the dynamo end helps to hold the dizzy by being between the two bushings on the dizzy.
Erich in Seattle
RE: Curious threaded hole in 3 speed G/B - bob46320 - 22-06-2018
If the distributer is linked to the ADVANCE Retard on the steering column, then it has to rotate without becoming unmeshed from its drive gear. A small screw (C35A005) about 2BA size stops the distributer from popping out, but allows rotation. If you don't have the ADV/RET, then the distributer is locked in position by a 1/4 " bolt (C35A006)
RE: Curious threaded hole in 3 speed G/B - Erich - 22-06-2018
Thank you, Bob. I have a manual retard/advance. Think I had heard that the screw has a spring on it as well.
Erich in Seattle
RE: Curious threaded hole in 3 speed G/B - Robert Leigh - 22-06-2018
(22-06-2018, 06:39 PM)Erich Wrote: Thank you, Bob. I have a manual retard/advance. Think I had heard that the screw has a spring on it as well.
Erich in Seattle
There should be a stepped bolt (or is it a setscrew?) with a plain shank 5/16" diameter I think just under the head and a lower 1/4" BSF portion that fixes it into the body. On the plain portion there should be a spring washer and plain washer above the clamp piece, to provide some stiffness for the manual advance/retard system. I have looked at the parts lists for 1933/4 and they all show the earlier distributor of 1930/31 pattern and do not show the system I have described. Perhaps someone else can find an illustration in one of the standard works.
Robert Leigh
RE: Curious threaded hole in 3 speed G/B - Chris KC - 24-06-2018
Would I be right in thinking the above handbrake ratchet fixing disappeared from the gearbox towards the end of 1928?
RE: Curious threaded hole in 3 speed G/B - JonE - 24-06-2018
brakes were still uncoupled in late 1929...
RE: Curious threaded hole in 3 speed G/B - Dennis Nicholas - 24-06-2018
Erich
Looks like you could have quite a lot of metal turned off the circumference of that massive universal joint.......save a lot of weight on a rotating part.
Dennis