Hitchcocks Forum

Hello oncs again,

Ztarting this up with the good news yesterday was a good day and the old bullet and me took a spinin the acternoon, wonderful!
After all this small items to repair we finally got the problem of missing oilprezsure lies in the oil pressure gauge, we bought a air one for compression and and oil pressure was there!

But know want find out on the old gauge, whats tbe prob.It is moving with airpressure, so basically working.


Does anybody has experience with disassambly of such gauge or a rep manual?

Would appreciatea a solution or information

Thankz
Clemens from Vienna

One more question, where to get a old
watch for the tank?

Hi Clemens,

I believe this is the company you are looking for. Better known for Speedo repairs, useful.

http://www.speedograph-richfield.com/ht ... nical.html

http://www.speedograph-richfield.com/index.html

Regards,

A.

A mate of mine fitted a morgo oil pump to his aerial square four. All good but the oil pressure guage stopped working. Turns out it worked by having a spiral of copper pipe with the needle attached, as the oil pressure increased, the spiral tended to untwist and made the needle move. A bit like one of those party tooters made of a coil of paper tube

Turns out the first run of the engine with the new oil pump had provided a huge increase in oil pressure and had effectively straightened the coil of copper pipe.

I'm not sure this helps fix yours but it's a bike from the same era and I thought quite an amusing story.

I think it is called a Bourdon Tube

Colin

dalgrae wrote: ↑

Mon Nov 09, 2020 3:16 pm

I think it is called a Bourdon Tube

Colin

Yes it is, and it is more of an arc than a spiral. Or it was on the ones I have taken apart.
Just two screws in the back to hold everything in place on the Smiths car ones.

Frank

Hello again!

Unfortunately Speedometer Richfield could not repair the oilgauge becaus of to much distorded and lack of parts.

Does anybody has possible a guide how to repair such manometer or other idea to stay with the old gauge?
Thanks Clemens

I'm sorry Speedograph Richfield were unable to help.

What is the diameter of the instrument body? There might be other classic gauges you could substitute until you can find someone who can repair or replace it.

A.