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Old 10th January 2014, 10:14 PM   #1
Belinda wheelwright
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un1 slave cylinder

Hi can anyone help what thread size is on Renault un1 clutch slave cylinder ?
Belinda & Keith
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Old 11th January 2014, 06:40 AM   #2
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Re: un1 slave cylinder

I assume you mean the bolts which hold it on. If so they are a very odd size. They are 7 mm. They can be a bit hard to get hold of. I got mine from a shop that specialised in old Classic British motor bikes as they were used on some old Triumph bikes. The other source would be engineers supply shops via the internet. I think I have some somewhere in the garage. I will have a look later today.
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Old 11th January 2014, 07:35 AM   #3
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Re: un1 slave cylinder

Or Ebay

M7x50 Bolts, 7mm Metric Thread 50mm long x5 bolts - ZINC plated | eBay

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Old 11th January 2014, 07:45 AM   #4
Belinda wheelwright
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Re: un1 slave cylinder

Quote:
Originally Posted by MikeP View Post
I assume you mean the bolts which hold it on. If so they are a very odd size. They are 7 mm. They can be a bit hard to get hold of. I got mine from a shop that specialised in old Classic British motor bikes as they were used on some old Triumph bikes. The other source would be engineers supply shops via the internet. I think I have some somewhere in the garage. I will have a look later today.
Cheers
Mike
sorry mike i wasnt very clear its the thread size for the pipe to feed the cylinder.
keith
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Old 11th January 2014, 08:48 AM   #5
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Re: un1 slave cylinder

Only the French would use M7.
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Old 11th January 2014, 12:53 PM   #6
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Re: un1 slave cylinder

OK. I would think that they are 10mm x 1mm with a length of about 20 mm and for 3/16" pipe. You can get them from EBay or somewhere like Automec. Mick Sollis has probably got some at the workshop. Chris Cole will know exactly what they are and may have some in stock as he does the sleeved down slave cylinders that I have on my car.
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Old 11th January 2014, 02:00 PM   #7
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Re: un1 slave cylinder

Hi Belinda,
The thread is M12x1mm and Speedflow do an adapter to take it to AN-4 male (357-04).

As these have a large bore (28mm), they need sleeving down to 22mm to give sufficient movement (basic hydraulic theory) to work with a .75” master cylinder. This is a known mod on these Renault transmissions and I’ve done mine and a few others for club members. Let me know if you want yours doing.

Regards,
Andy
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Old 11th January 2014, 02:02 PM   #8
Belinda wheelwright
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Re: un1 slave cylinder

Quote:
Originally Posted by MikeP View Post
OK. I would think that they are 10mm x 1mm with a length of about 20 mm and for 3/16" pipe. You can get them from EBay or somewhere like Automec. Mick Sollis has probably got some at the workshop. Chris Cole will know exactly what they are and may have some in stock as he does the sleeved down slave cylinders that I have on my car.
Cheers
Mike
thank you mike i will order one from speedflow on monday
keith
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Old 20th February 2016, 03:43 PM   #9
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Re: un1 slave cylinder

Gents I note the below statement in this older thread.. I wonder how this is achieved, can someone offer guidance as I have a lot travel on my pedal and I'm inching to IVA.
Regards Andrew

As these have a large bore (28mm), they need sleeving down to 22mm to give sufficient movement (basic hydraulic theory) to work with a .75 master cylinder. This is a known mod on these Renault transmissions and Ive done mine and a few others for club members. Let me know if you want yours doing.
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Old 22nd February 2016, 05:24 AM   #10
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Re: un1 slave cylinder

Hi Andrew,
It's acheived by machining down a smaller slave cylinder to fit in the current Renault housing
sent you a PM
Rgds,
Andy
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Old 22nd February 2016, 10:02 AM   #11
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Re: un1 slave cylinder

I sleeve to 22mm, going down further will make a very heavy pedal.
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Old 5th April 2017, 01:40 AM   #12
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Re: un1 slave cylinder

Hello

I have an un1 with ford bellhousing and ford input shaft.
now i wondering if i can use renault 20 slave cylinder.
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Old 5th April 2017, 10:16 AM   #13
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Re: un1 slave cylinder

Willwood does make some 1" master cylinders. But the selection is limited.
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Old 10th April 2017, 03:34 PM   #14
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Re: un1 slave cylinder

Okay. So with the 1" wilwood master cylinder, I don't have to do anything with the slave cylinder right?
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Old 23rd September 2017, 03:25 PM   #15
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Re: un1 slave cylinder

Correct. I have a 1" Girling master M2472 which I believe was once used on 1970's land rover. I have the Renault 25 Delphi LL21520 slave cylinder pushing an AP Racing CP2394-14 clutch inside a R30 bellhousing & Ford Essex flywheel. This works fine for me, 12000 miles and no problems.
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Old 25th September 2017, 05:20 AM   #16
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Re: un1 slave cylinder

Hello again,

I cannot find anyone who is selling the Girling M2472 1 inch master cylinder, but I have found OBPltd.com who make a similar 1 inch (25.4mm) master cylinder. Part numbers are: OBPMCN17, or if you want an integral reservoir version OBPMC007. Parts are in stock, so I'll be buying one for my service kit. Tony.
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