Brake Drum Size

[Robert FilbeyParticipant]

Hi, I have a 1953 11BL.  I’m trying to figure out the correct diameter for the front and rear brake drums.  My on line searches have resulted in conflicting information.  Does anyone happen to know the answer to this question?  Thanks very much.

[BernieParticipant]

The workshop manual specifies drum sizes.

A pdf version is available for download in the technical area of the members only part of the forum.

Better still, the Club also has brand new manual and spare parts catalogue reprints for sale, much easier to have a hard copy to study.  Contact Ian Harvey….

secretary@traction-owners.co.uk.

B…..

[Robert FilbeyParticipant]

Thanks Bernie.  Since I posted this, I did a more careful search in the technical area and I think I found the answer.  Looks like the front drums are 12 inches in diameter and the rear drums are 10 inches in diameter.  I also found another reference which seemed to indicate that earlier BL’s had 10 inch diameter drums on the front as well.  Appreciate the info regarding the reprints, will contact Ian about that.

[BernieParticipant]

Yes, those are the nominal diameters but the manual also states the precise maximum permissable revised diameters should the drums be worn or machined to rectify wear.

And, yes again, pre-war small bodied cars did indeed have 10″ front and rear.

B…..

[Andrew HassamParticipant]

Hello,

I’m new to the TOC and have not yet located the pdf workshop manual referred to in this thread. Where exactly do I have to go to find it?

With thanks,

Andrew

[BernieParticipant]

Andrew,

A 6-year-old would probably access it in half the time it usually takes me, however ……

<span style=”font-size: 17px;”>Click on “Members Only Area” in the drop-down menu, top left on Home page.</span>

<span style=”font-size: 17px;”>Scroll down to “Tech Library” and click “Browse”</span>

<span style=”font-size: 17px;”>Scroll down to “Spare Parts and Repair manuals”</span>

<span style=”font-size: 17px;”>Click on the inverted Chevron to reveal list of publications.  Scroll down to the required pdf and then click on the small image under the title.</span><!–/data/user/0/com.samsung.android.app.notes/files/clipdata/clipdata_bodytext_250826_165810_723.sdocx–>

B…..

[BernieParticipant]

…. and a 6-year-old would not have had all the additional gibberish in the above message.  Hey-ho, say larvae.

[BernieParticipant]

<p style=”margin-bottom: 1em; color: #000000; font-family: ‘Source Serif Pro’, serif; font-size: 12px; background-color: #fbfbfb;”>See if this is any clearer …..</p>
<p style=”margin-bottom: 1em; color: #000000; font-family: ‘Source Serif Pro’, serif; font-size: 12px; background-color: #fbfbfb;”>Click on “Members Only Area” in the drop-down menu, top left on Home page.</p>
<p style=”margin-bottom: 1em; color: #000000; font-family: ‘Source Serif Pro’, serif; font-size: 12px; background-color: #fbfbfb;”>Scroll down to “Tech Library” and click “Browse”.</p>
<p style=”margin-bottom: 1em; color: #000000; font-family: ‘Source Serif Pro’, serif; font-size: 12px; background-color: #fbfbfb;”>Scroll down to “Spare Parts and Repair manuals”</p>
<p style=”margin-bottom: 1em; color: #000000; font-family: ‘Source Serif Pro’, serif; font-size: 12px; background-color: #fbfbfb;”>Click on the inverted Chevron to reveal list of publications.  Scroll down to the required pdf and then click on the small image under the chosen title.</p>
<p style=”margin-bottom: 0px; color: #000000; font-family: ‘Source Serif Pro’, serif; font-size: 12px; background-color: #fbfbfb;”>B…..</p>

[BernieParticipant]

Bummox!  I’m off to find a 6-year-old.

[Andrew HassamParticipant]

Thanks, Bernie. I’d been looking in the right place but not identified it. I really needed the help of that 6-year-old. Still, I have it now.

[Author]

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