Source for brake M/C

Started by BlownMGB-V8, June 10, 2018, 08:06:37 AM

Previous topic - Next topic
Print
Go Down Pages1
User actions

BlownMGB-V8

June 10, 2018, 08:06:37 AM
The Mark-I MGB used a metal canister type 3/4" bore M/C, the early Spitfire used the same M/C with an 11/16" bore.

I need one with a 5/8" bore.

Does anyone know what car that was used in?

Jim

BlownMGB-V8

#2
June 10, 2018, 12:32:41 PM
Thanks Graham, that'll be the last resort as I'd have to reconfigure the line(s) and I'd rather have matching M/C's. My balance bar needs a little help as it is at the end and still needs more.

I'd like to stick with the tin-can reservoir OEM type if I can find one. The Mini is a little closer than the Spitfire/Midget one but my calculations indicate the 5/8" would be a better match.

Jim

ex-tyke

#3
June 10, 2018, 12:55:17 PM
Might investigate re-sleeving your 3/4" M/C and getting a 5/8 rebuild kit and piston.(you're good at lathe work)

Do it yourself or have White Post do for you.
http://whitepost.com/brake-sleeving-rebuilding-services/

BlownMGB-V8

#4
June 10, 2018, 01:05:28 PM
Actually that was wrong, the 11/16 bore is less than .700" so the Spitfire M/C would be better than the Mini.

But my guess is that an earlier car, maybe something pre-disc brake would have used a 5/8" bore.

Jim

geezer

#6
June 11, 2018, 11:26:22 AM
Jim,

You might look into a clutch master cyl from a Midget, Sprite, or a Spitfire.  If memory serves me they are smaller than the brake cyl.

BlownMGB-V8

#7
June 11, 2018, 02:15:55 PM
Yes, they are 11/16". I need 5/8"

Jim

ex-tyke

#8
June 11, 2018, 05:39:00 PM
I assume that you want a dual circuit M/C (rather than a single)  
 Might not be anything out there that small ......I still maintain that sleeving is a viable option.

BlownMGB-V8

#9
June 11, 2018, 08:02:03 PM
Actually Graham I'm looking for a single circuit M/C and would also consider a clutch M/C. I have a twin master/balance bar setup, with dashboard adjustment knob. Currently both M/C's are 3/4" bore just like the mark I and II cars use.

Apparently the Minx used a 5/8" M/C for the clutch which I think would work, Lockheed No. 4223-917 Where to get a new one is the question.

Jim

ex-tyke

#10
June 11, 2018, 08:34:44 PM
If your looking for a basic single circuit master, check the Dorman website for clutch masters . Here's one 5/8"  bore example for a Ford Courier.
https://www.dormanproducts.com/p-9028-cm39125.aspx?origin=keyword
Ford Courier clutch master.JPG

BlownMGB-V8

#11
June 12, 2018, 08:34:42 AM
That Dorman does look pretty good. I've sent Kelvin a note to see if maybe Moss might have the Minx part. If not I may have to go with one of those types.

Jim

BlownMGB-V8

#14
June 12, 2018, 04:20:44 PM
Thanks Graham, I just sent them an email.

Moss has the .700" one for the midget.

Jim

mgb260

#15
June 12, 2018, 04:48:20 PM
The Datsun/Nissan Z master:


https://www.ebay.com/i/112981256561?chn=ps

BlownMGB-V8

#16
June 15, 2018, 03:09:34 PM
Got one coming from UK. NOS, hopefully get here in the next couple weeks.

Jim

ex-tyke

#17
June 15, 2018, 03:44:18 PM
QuoteGot one coming from UK. NOS, hopefully get here in the next couple weeks.
Application?....photo?....inquring minds need to know!

BlownMGB-V8

#18
June 16, 2018, 10:11:37 AM
I'll post a photo when it gets here but as far as I can tell it looks just like the early MGB round tin can master. (or clutch M/C which is what it is) May be zinc galvanized rather than cadmium chromated.

Application is Rapier Minx, part number is Lockheed AP #  4223 - 917.

No longer being made according to one source. N.O.S. like I mentioned, no idea how many are left. My guess, not many.

Jim
Print
Go Up Pages1
User actions