Technical Help required from our Italian members

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Technical Help required from our Italian members

I have had a response from the supplier lafo_it who says that the standard 500L pedal box should operate this cylinder......at least he responded!
I explained the situation and will see where this goes - I'm awaiting the manufacturers response.
 
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Morning Andrew;
We only tried the 'pedal' method of bleeding, but not only did my colleague have great problem in getting a 'pedal', when he did get one that was 'sort of acceptable', he found that constant pressure on the brake pedal slowly degraded the hardness of the pedal and the brake pedal slowly went to the floor. With regard to the brake-light switch, (we bought the switch that NANNI advises on their web-site is the one for the Mini-servo)they wouldn't fit AT ALL. The diameter of the switch thread is slightly greater than the female thread in the end 'nut' on the master-cylinder. I have subsequently discovered that the 'original' master switch possibly uses an 'imperial' thread (1/8--poss UNF )--in an Italian master-cylinder!
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Hi, Tom and Andrew,

The replacement switch thread might be 10 x 1mm so 25.4!! threads per inch.

The female thread in the end 'nut' on the master cylinder might be :-
1/8th inch BSP (British Standard Pipe) thread nominal diameter = 0.383in. = 9.7282 mm. 1/8th inch BSP Tr (BSP Taper) thread is the same.
1/8th inch BSP is 28 T.P.I. This would be slightly smaller than the rep. switch thread.

There's also 1/8th NPT (American National Taper Pipe Thread) whose nominal diameter is 0.405 inches (10.287mm). Idk the t.p.i.

Idk if you said if the thread was tapered? but I'll assume it is as someone mentioned using PTFE pipe tape when fitting theirs.

Maybe you could try switch units (brake, oil pressure w/light etc) from other cars (old Mini, Ford etc) to determine what thread you require on the switch to fit the master cylinder end 'nut'.

Some of the older cheapie (like mine :) ) tap and die sets included a 1/8th BSP tap.... and iirc the thread gauge (if supplied) had this size included...

Looking through the various m. cyl's on the gol inelliloris website, I noticed a number of them use a 2 or 3 way union held in place by a banjo bolt. This arrangement was used on some older Fiats where there was only one outlet port on the cylinder. Maybe the switch supplied to you is designed to screw into a brake pipe union?
As you no doubt know, 10 x 1mm is a common thread on Fiat brake pipe unions.... (iirc there was also a coarser thread used in the past.)

P.S. I'm not an expert on thread sizes, just posting a few dimensions I got from my old Zeus Precision Tables pocket book in the hope they might help. If I'm wrong, I will respectfully :worship::worship: to the proper Engineers on here, I'm only a humble Mechanic:cry:.

Al. :)
 
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Al, very few of us on the Forum are 'experts', I certainly am not. Most of what I know comes from practical experience and what I was taught by Geoff Anstead (during my time at Radbourne Racing). Notwithstanding that, your advice and input is always interesting and appreciated. Thank you.
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Hi Tom, (y)

Many thanks for your kind words.

I always enjoy hearing about your experiences with Radbourne Racing :worship:and how things were done 'back in the (good old) days'. You truly are a mine of great information including where to try for parts etc. nowadays.

Would Ant Anstead from the tv car restoration series be related to Geoff?
Ant seems to know a helluva lot for a relatively young guy. (I'm not!!).

Al.
 
Sadly Al, neither am I in my first flush of youth, so much so I have trouble remembering what that first flush was like! I have often wondered about Ant Anstead---among his many talents, his company built some top-notch Aston Martin replicas--they were NOT cheap, but all were pre-sold!
I know that you are in SE Ireland, but do you ever get to Liverpool?--I live just outside Chester, just a train-trip away from Liverpool--between us we could find a good place for a pint and chatter!
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Evening Andrew;
Have you had any response from 'Golinelli Loris' (the manufacturer of the 'mini-servo' brake master-cylinders) yet? The german and Dutch companies seem to respond quite quickly, but the Italians are not great responders---is it they think that if they don't respond the problem will somehow just disappear?
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Hi Tom
I had a response from the vendor and manufaturer.
Both were hopeless and could care less - this is as expected... No doubt because of Brexit.
I bought a 126 pedal box to experiment on and now have an installed solution.
The piston on the upgraded cylinder requires a longer pedal rod.
I have bought a 10mm clevis bracket and some 10mm studding.
Turned the end of the stud to dome finish and removed the first 50mm of the thread to prevent it ripping the rubber dust cover of the cylinder to pieces.
Then cut the stud to 85mm long and this allowed for some adjustment within the clevis when fitted - and hey presto!! High and firm pedal acheived....!
 
Thank you for that up-date Andrew. Why is it that the Italian companies are so crap at responding to queries? Then they wonder why we tend to deal with the German and Dutch companies, from whom I have always had a rapid response from any query I have made.
With regard to master-cylinder operating rods--- F.D.Ricambi sell 2 (I knew I had seen it somewhere)---the 500 F+L rod is 55mm long, whilst the rod for the 500R and the 126 is------75mm long.
My colleague and I bought out 'Mini-servo' master cylinders from 'Nanni', so my colleague is getting his Italian friend (who lives close the Nanni) to go round and have a face-to-face chat with them---let's see what that produces!
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The problem is solved - the master cylinder appears to be made for the later cars.
I will be in italy in july on my holidays- and plan to visit a tuning specialist .
Next mod is the engine stabiliser damper.
 
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