The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
It is currently Sun Apr 22, 2018 4:58 am

All times are UTC




Post new topic  Reply to topic  [ 10 posts ] 
Author Message
PostPosted: Thu Dec 14, 2017 10:09 am 
Offline
TDC Member

Joined: Fri Oct 13, 2017 1:31 pm
Posts: 35
Are the brake pipe fittings imperial 3/8"UNF or Metric M10?


Top
   
PostPosted: Thu Dec 14, 2017 10:59 am 
Offline
TDC West Mids Area Organiser
User avatar

Joined: Thu Sep 28, 2006 12:13 pm
Posts: 11577
Location: Over here...can't you see me?
I believe the tandem master cylinder has metric threads (two different ones to prevent the lines getting mixed!) but generally all the rest are imperial


Top
   
PostPosted: Thu Dec 14, 2017 2:53 pm 
Offline
TDC Member

Joined: Mon Dec 12, 2016 9:53 pm
Posts: 492
Location: Harrow Middlesex
Quote:
I believe the tandem master cylinder has metric threads (two different ones to prevent the lines getting mixed!) but generally all the rest are imperial
Alun

Im gald you said that,as i have switched over from a single master cylinder,to a tandem master cylinder not made my brake pipes yet

Dave


Top
   
PostPosted: Thu Dec 14, 2017 8:58 pm 
Offline
TDC Member

Joined: Fri Oct 13, 2017 1:31 pm
Posts: 35
Thanks guy, great info as normal 👍👍


Top
   
PostPosted: Thu Dec 14, 2017 10:05 pm 
Offline
TDC West Mids Area Organiser
User avatar

Joined: Thu Sep 28, 2006 12:13 pm
Posts: 11577
Location: Over here...can't you see me?
I've been dwelling on this all day, so just opened up a new tandem cylinder to check.

The smaller of the two unions is 3/8". The larger has a diameter that seems to be either slightly bigger than 7/16" or slightly smaller than 12 mm, but I've not been able to lay my hands on a bolt or union of either size to test. 7/16" seems the closer, but something niggles that there's something metric about the cylinder...


Top
   
PostPosted: Thu Dec 14, 2017 10:12 pm 
Offline
TDC Member
User avatar

Joined: Sat Apr 12, 2014 10:02 pm
Posts: 1958
Location: Nr Kenilworth
was the bore a metric size Alun? I have a twin cyl off a car and thought the threads looked imperial still?

Tony

_________________
Membership 2014047


Top
   
PostPosted: Thu Dec 14, 2017 11:16 pm 
Offline
TDC Shropshire Area Organiser

Joined: Sun Aug 21, 2011 4:12 pm
Posts: 4439
Location: Highley, Shropshire
Quote:
I've been dwelling on this all day, so just opened up a new tandem cylinder to check.

The smaller of the two unions is 3/8". The larger has a diameter that seems to be either slightly bigger than 7/16" or slightly smaller than 12 mm, but I've not been able to lay my hands on a bolt or union of either size to test. 7/16" seems the closer, but something niggles that there's something metric about the cylinder...
All the tandem cylinders i've had have metric at both outlet ports, I have unions in stock that fit the front (larger) port, they are the same as used in a number of Peugeot and Citroen rear wheel cylinders (which is how I buy them from the factors) I can't say exactly what the size is, i've never asked, but I can't imagine a French car company using imperial unions at ANY price! You can get a 3/8" UNF bolt into the rear port, but it will not tighten correctly if you use a 3/8" union on a brake pipe. The correct thread at the rear is 10x1.25, the standard metric male union.

Steve

_________________
2 door '73 Toledo with Vauxhall Carlton engine OWF 797M (The Carledo)
Vermillion (and Rust) Sprint Auto EGP 247T (The Dolomega)
'91 Cavalier 2ltr 8v auto
'95 Cavalier 2ltr 16v auto
Spectrum Auto Services, Servicing, Repairs, MOT prep. Apprentice served Triumph Specialist for 40 years and home of Maverick Triumph.PM for more info or quotes.


Top
   
PostPosted: Fri Dec 15, 2017 9:48 am 
Offline
TDC West Mids Area Organiser
User avatar

Joined: Thu Sep 28, 2006 12:13 pm
Posts: 11577
Location: Over here...can't you see me?
Thanks Steve, good job I only lose tested 3/8” then!


Top
   
PostPosted: Sat Dec 16, 2017 10:54 am 
Offline
TDC Member

Joined: Wed Apr 06, 2016 12:28 pm
Posts: 4
Location: Bristol
Hi Guys I'm in the process of converting my Dolly to dual circuit and have obtained a tandem mastercylinder that definately has the primary outlet of 7/16" unf and the secondary of 3/8" unf as checked with thread gauge, micrometer and sample bolts just to make sure. I was told it was an early type so from previous replies it seems as though early ones are imperial and later ones are metric. Hope that helps.

Jim

_________________
I am a TDC member


Top
   
PostPosted: Sun Dec 17, 2017 5:52 am 
Offline
TDC Shropshire Area Organiser

Joined: Sun Aug 21, 2011 4:12 pm
Posts: 4439
Location: Highley, Shropshire
Quote:
Hi Guys I'm in the process of converting my Dolly to dual circuit and have obtained a tandem mastercylinder that definately has the primary outlet of 7/16" unf and the secondary of 3/8" unf as checked with thread gauge, micrometer and sample bolts just to make sure. I was told it was an early type so from previous replies it seems as though early ones are imperial and later ones are metric. Hope that helps.

Jim
There is an early dual circuit master cylinder that was only offered on certain export market cars which is different to the generally accepted tandem cylinder (Triumph part number519978) I've not seen one of these in many years, but this is presumably what you have and it may well be imperial. There are possibly even 2 different early ones as there is a LHD choice too (I have one of these, BOTH ports are 10mm)

Steve

_________________
2 door '73 Toledo with Vauxhall Carlton engine OWF 797M (The Carledo)
Vermillion (and Rust) Sprint Auto EGP 247T (The Dolomega)
'91 Cavalier 2ltr 8v auto
'95 Cavalier 2ltr 16v auto
Spectrum Auto Services, Servicing, Repairs, MOT prep. Apprentice served Triumph Specialist for 40 years and home of Maverick Triumph.PM for more info or quotes.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 10 posts ] 

All times are UTC


Who is online

Users browsing this forum: Google [Bot] and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Limited