101 brake drum must have shrunk ...

A

AJG

Guest

• May 8, 2006

• #1

Ok then. Got myself some Britpart brake cylinders from Beamends (at a
very reasonable price I might add), and have what appear to be the
correct shoes (I was supplied with them and don't know the source) so I
could set about the leaking front brakes on the 101.
Got all the fittings to undo and replaced the cylinders ... obviously a
bad omen as I hadn't sheared anything off. New shoes went on but brake
drum wouldn't!!! Adjusters backed right off and with some persuasion
I've got the drum on but it's far too tight on the shoes to be usable.

I've exercised the adjusters (the few clicks they will go) and pumped
the pedal to try to centralise the shoes if they're misaligned but no
joy.

Going to do some comparison measurements of take-off and new parts
tomorrow but anyone got any other ideas short of the incredible
shrinking brake-drum?

--
AndyG

 

L

Lee_D

Guest

• May 8, 2006

• #2

AJG <[email protected]> uttered summat worrerz funny about:
> Ok then. Got myself some Britpart brake cylinders from Beamends (at a
> very reasonable price I might add), and have what appear to be the
> correct shoes (I was supplied with them and don't know the source) so
> I could set about the leaking front brakes on the 101.
> Got all the fittings to undo and replaced the cylinders ... obviously
> a bad omen as I hadn't sheared anything off. New shoes went on but
> brake drum wouldn't!!! Adjusters backed right off and with some
> persuasion I've got the drum on but it's far too tight on the shoes
> to be usable.
> I've exercised the adjusters (the few clicks they will go) and pumped
> the pedal to try to centralise the shoes if they're misaligned but no
> joy.
>
> Going to do some comparison measurements of take-off and new parts
> tomorrow but anyone got any other ideas short of the incredible
> shrinking brake-drum?

Try the shoes on another axle which you know the cylinders work on. If it
fits then it'll be the cylinders that are some how wrong.. if it doesn't
then It'll be the shoes.

Do the cylinders have a profile on the slot in the piston? If so is this the
wrong way around? I.e. Would rotating the piston by 180 degrees put things
right?

Could be way off the mark but just thoughts off the top of my head.

Lee
--
www.lrproject.com
Reaching the parts other Landrover restorers can't reach - JLo makes new
home in the USA.
Percy IIa - two Engines to the mile, awaits a new chassis.
Morph - He's "living the dream".

 

E

EMB

Guest

• May 8, 2006

• #3

AJG wrote:
> Ok then. Got myself some Britpart brake cylinders from Beamends (at a
> very reasonable price I might add), and have what appear to be the
> correct shoes (I was supplied with them and don't know the source) so I
> could set about the leaking front brakes on the 101.
> Got all the fittings to undo and replaced the cylinders ... obviously a
> bad omen as I hadn't sheared anything off. New shoes went on but brake
> drum wouldn't!!! Adjusters backed right off and with some persuasion
> I've got the drum on but it's far too tight on the shoes to be usable.
>
> I've exercised the adjusters (the few clicks they will go) and pumped
> the pedal to try to centralise the shoes if they're misaligned but no joy.
>
> Going to do some comparison measurements of take-off and new parts
> tomorrow but anyone got any other ideas short of the incredible
> shrinking brake-drum?
>

I had many sets of shoes (for various vehicles) in the past that have
needed judicious attention with a file where they pivot and touch the
pistons to make them fit. And conversely I've had the occasional set
(all have been Mazda shoes) that have needed a small application of weld
to build them up so they will adjust corectly.

So long as the lining radius matches the drum and the extra adjustment
needed is only slight filing them is an acceptable option.

PS. Having absolutely no idea about the way 101 brakes are designed (and
if they are twin-leading shoes then ignore this) I will also suggest
checking that you have the leading and trailing shoes correctly positioned.

--
EMB

 

T

Tom Woods

Guest

• May 8, 2006

• #4

Must be all that rain weve had shrinking them

 

A

Austin Shackles

Guest

• May 8, 2006

• #5

On or around Mon, 08 May 2006 12:52:38 +1200, EMB <[email protected]>
enlightened us thusly:

>
>PS. Having absolutely no idea about the way 101 brakes are designed (and
>if they are twin-leading shoes then ignore this) I will also suggest
>checking that you have the leading and trailing shoes correctly positioned.

twin leading shoes on every wheel, AIUI, which is a bit of a daft thing to
do, as it means it's got hopeless brakes in reverse. I believe this is
what's known by software engineers as a "feature".
--
Austin Shackles. www.ddol-las.net my opinions are just that
If all be true that I do think, There are five reasons we should drink;
Good wine, a friend, or being dry, Or lest we should be by and by;
Or any other reason why. - Henry Aldrich (1647 - 1710)

 

T

Tim Hobbs

Guest

• May 8, 2006

• #6

On Mon, 08 May 2006 09:38:40 +0100, Austin Shackles
<[email protected]> wrote:

>On or around Mon, 08 May 2006 12:52:38 +1200, EMB <[email protected]>
>enlightened us thusly:
>
>>
>>PS. Having absolutely no idea about the way 101 brakes are designed (and
>>if they are twin-leading shoes then ignore this) I will also suggest
>>checking that you have the leading and trailing shoes correctly positioned.
>
>twin leading shoes on every wheel, AIUI, which is a bit of a daft thing to
>do, as it means it's got hopeless brakes in reverse. I believe this is
>what's known by software engineers as a "feature".

You don't start a climb unless you a damned sure you are going to make
it! The brakes are only just passable going forwards, going backwards
you might as well drag your foot on the road....



--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'03 Volvo V70
'06 Nissan Navara aka "The Truck"

 

B

beamendsltd

Guest

• May 8, 2006

• #7

In message <[email protected]>
AJG <[email protected]> wrote:

> Ok then. Got myself some Britpart brake cylinders from Beamends (at a
> very reasonable price I might add), and have what appear to be the
> correct shoes (I was supplied with them and don't know the source) so I
> could set about the leaking front brakes on the 101.
> Got all the fittings to undo and replaced the cylinders ... obviously a
> bad omen as I hadn't sheared anything off. New shoes went on but brake
> drum wouldn't!!! Adjusters backed right off and with some persuasion
> I've got the drum on but it's far too tight on the shoes to be usable.
>
> I've exercised the adjusters (the few clicks they will go) and pumped
> the pedal to try to centralise the shoes if they're misaligned but no
> joy.
>
> Going to do some comparison measurements of take-off and new parts
> tomorrow but anyone got any other ideas short of the incredible
> shrinking brake-drum?
>

It's probably granny, eggs, sucking etc - but you have got everything
the right way round? Usually the problem with drum brakes is the
exact opposite...... ;-)


Richard
--
www.beamends-lrspares.co.uk [email protected]
RISC-OS - Where have all the good guys gone?
Boycott the Yorkshire Dales - No Play, No Pay

 

B

beamendsltd

Guest

• May 8, 2006

• #8

In message <[email protected]>
Tim Hobbs <[email protected]> wrote:

> On Mon, 08 May 2006 09:38:40 +0100, Austin Shackles
> <[email protected]> wrote:
>
> >On or around Mon, 08 May 2006 12:52:38 +1200, EMB <[email protected]>
> >enlightened us thusly:
> >
> >>
> >>PS. Having absolutely no idea about the way 101 brakes are designed (and
> >>if they are twin-leading shoes then ignore this) I will also suggest
> >>checking that you have the leading and trailing shoes correctly positioned.
> >
> >twin leading shoes on every wheel, AIUI, which is a bit of a daft thing to
> >do, as it means it's got hopeless brakes in reverse. I believe this is
> >what's known by software engineers as a "feature".
>
> You don't start a climb unless you a damned sure you are going to make
> it! The brakes are only just passable going forwards, going backwards
> you might as well drag your foot on the road....
>
>
>
A least we know why the Italian armt didn't buy them

Richard
--
www.beamends-lrspares.co.uk [email protected]
RISC-OS - Where have all the good guys gone?
Boycott the Yorkshire Dales - No Play, No Pay

 

I

Ian Rawlings

Guest

• May 8, 2006

• #9

On 2006-05-08, beamendsltd <[email protected]> wrote:

> A least we know why the Italian armt didn't buy them

Why would the Italians need brakes going backwards for? I'd have
thought they'd want strong brakes forward but none backwards...

hehe, nothing like a bit of johnny foreigner bashing..

Just trying to think up something French-related now.

--
Blast off and strike the evil Bydo empire!

 

A

AJG

Guest

• May 8, 2006

• #10

In message <8fe0d8234e%[email protected]>, beamendsltd
<[email protected]> writes
>In message <[email protected]>
> AJG <[email protected]> wrote:
>> Going to do some comparison measurements of take-off and new parts
>> tomorrow but anyone got any other ideas short of the incredible
>> shrinking brake-drum?
>>
>
>It's probably granny, eggs, sucking etc - but you have got everything
>the right way round? Usually the problem with drum brakes is the
>exact opposite...... ;-)
>
>
Everything looks correct ... adjusters on the snails, springs in the
spring holes etc. and the pair of shoes look identical. I did the near
side today in about 30 minutes except I didn't replace the cylinders.
I've measured everything and I can't see the difference. I've reseated
the shoes again today and I'll be blowed if I can see what's wrong. My
next trick is to put the shoes into the drums loose and make sure there
isn't a twist on one of the shoes ...

--
AndyG