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Brake master cylinder
Posted: Sun Apr 27, 2008 1:17 am
by tortron
i just read that there was an early and a later version of the master cylinder. Is this true?
If so how can i tell the difference, i.e. part numbers.
thanks
Posted: Sun Apr 27, 2008 11:09 am
by Onne
Yes, two sizes (difference is in bore size) early cars (7" drums all round) had the larger bore, later 8" braked cars had the smaller bore.
Posted: Sun Apr 27, 2008 11:58 am
by tortron
is there any way to tell the difference from the outside? without having another to compare with
Posted: Sun Apr 27, 2008 12:31 pm
by Rasputin
The earlier ones had 13/16 stamped into them ,and the later ones7/8
Posted: Sun Apr 27, 2008 2:04 pm
by tortron
ha, so simple
Posted: Sun Apr 27, 2008 2:14 pm
by moggs222
I thought it was the early master cylinder that was 7/8" and the later one that was 13/16", best check.
moggs222
Posted: Mon Apr 28, 2008 7:21 am
by tortron
any confirmation on this?
Posted: Mon Apr 28, 2008 10:03 am
by Kevin
From a spares website
Brake Master Cylinder 13/16" Bore (Genuine Lockheed) RECOMMENDED The 7/8" Bore Master Cylinder fitted to Pre 1962 Models is no longer available. The 13/16" can be used as a replacement for Pre 1962 models.
Posted: Mon Apr 28, 2008 11:07 am
by Rasputin
Apologies if I got it wrong,but I got the info from Minor Matters technical tips
Posted: Mon Apr 28, 2008 7:20 pm
by moggs222
I had a look at the master cylinders on the shelf at my workshop and have got the following information that may be of help.
Early Lockheed 7/8" Master Cylinder Part Number LM18702
Late Lockheed/Delphi 13/16" Master Cylinder Part Number LM15453
Currently the late 13/16" Master Cylinder is manufactured by Caparo-AP Braking and their Part Number is 4225-453 PT3P and is available from most specialists.
I think MGM Spares who advertise in the club magazine have recently had the early master cylinder made but I suggest ringing them to check.
Hope this helps, regards Moggs222