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Old 03-31-2005, 00:01   #1 (permalink)
John
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DS Brake caliper saga

Rear RH caliper outer piston does not apply same pressure as inner piston
resulting in vehicle pulling to left on braking. Inside of caliper cylinder
and sides of old piston showed no signs of wear to me on examination though
outer piston was a "tight fit"(this was original problem (and badly worn
disc on that side too).)
(new pistons and seals to caliper on RH wheel, and new discs to both rear
wheels.)
Vehicle still pulls to left on braking despite new parts.


Should I bite the bullet and fork out for a new caliper?
Do I need to replace LH one at same time?
Do these parts come complete with seals and pistons in situ?

Anyone know what part number I need?
I have seen:-
Rear RH (Late) STC1264#105050 @ 50.40

Rear RH RR,DS RTC5889#105051 @ 90.68

My Disco is :- 94 Discovery 300tdi (reg 20/6/94)

Thanks for any help.


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Old 03-31-2005, 01:02   #2 (permalink)
EMB
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Re: DS Brake caliper saga

2 points spring to mind

Firstly it's very unlikely that you will feel a rear brake imbalance as
a pulling on the road.

Secondly, unless you're machining both discs and fitting new pads to
both sides you'll never be able to tell if the braking is even.


--
EMB
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Old 03-31-2005, 01:02   #3 (permalink)
Austin Shackles
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Re: DS Brake caliper saga

On or around Thu, 31 Mar 2005 07:43:05 +0100, "John" <john@tollick.plus.com>
enlightened us thusly:


>
>Should I bite the bullet and fork out for a new caliper?
>Do I need to replace LH one at same time?
>Do these parts come complete with seals and pistons in situ?
>
>Anyone know what part number I need?
>I have seen:-
>Rear RH (Late) STC1264#105050 @ 50.40
>
>Rear RH RR,DS RTC5889#105051 @ 90.68
>
>My Disco is :- 94 Discovery 300tdi (reg 20/6/94)


Changes such as that normally go by chassis number.

It's always advisable to change brake bits on a per-axle basis - in
emergency, you can get away with changing things on one side only, but it
often leaves you with unbalanced brakes.

Generally, a tight piston is most likely to be something under the seal
causing it to not seat fully, and/or a dud piston, which is less likely in
your case.


Paddock's list has the following:

RTC5889 Rear Brake Caliper (New) - RH - to 38S44171D and 32S2118B
(approx March 1993) 46.50

RTC5890 Rear Brake Caliper (New) - LH - to 38S44171D and 32S2118B
(approx March 1993) 46.50

STC1264 Rear Brake Caliper (New) - RH - from 38S44172D and 32S2119B
(approx March 1993) 41.50

STC1265 Rear Brake Caliper (New) - LH - from 38S44172D and 32S2119B
(approx March 1993) 41.50


Those numbers look like axle numbers, at a guess, which would go with the
approximate dates. You're going to have to try and find the number, unless
it's possible to tell by looking at the caliper. Your disco is *probably*
the STCnnnn type, but not guaranteed to be.

Oddly, the front calipers are listed by VIN, not axle number.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
Appearances: You don't really need make-up. Celebrate your authentic
face by frightening people in the street.
from the Little Book of Complete B***ocks by Alistair Beaton.
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Old 03-31-2005, 01:02   #4 (permalink)
beamendsltd
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Re: DS Brake caliper saga

In message <424b9c78$0$42312$ed2619ec@ptn-nntp-reader02.plus.net>
"John" <john@tollick.plus.com> wrote:

> Rear RH caliper outer piston does not apply same pressure as inner piston
> resulting in vehicle pulling to left on braking. Inside of caliper cylinder
> and sides of old piston showed no signs of wear to me on examination though
> outer piston was a "tight fit"(this was original problem (and badly worn
> disc on that side too).)
> (new pistons and seals to caliper on RH wheel, and new discs to both rear
> wheels.)
> Vehicle still pulls to left on braking despite new parts.
>
>
> Should I bite the bullet and fork out for a new caliper?


That's certainly an option - possibly the easiest

> Do I need to replace LH one at same time?


Not if it working ok

> Do these parts come complete with seals and pistons in situ?


Yes - on the whole

>
> Anyone know what part number I need?
> I have seen:-
> Rear RH (Late) STC1264#105050 @ 50.40
>
> Rear RH RR,DS RTC5889#105051 @ 90.68
>
> My Disco is :- 94 Discovery 300tdi (reg 20/6/94)


The two above are from Axle No. 28S44172D and to Axle No. 28S44171D
repectively. I'd guess that uors is the former, but I couldn't be
certain.

>
> Thanks for any help.
>
>


Richard

--
www.beamends-lrspares.co.uk sales@beamends-lrspares.co.uk
Running a business in a Microsoft free environment - it can be done
Powered by Risc-OS - you won't get a virus from us!!
Helping keep Land Rovers on and off the road to annoy the Lib Dems
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Old 03-31-2005, 02:01   #5 (permalink)
Austin Shackles
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Re: DS Brake caliper saga

On or around Thu, 31 Mar 2005 08:14:26 +0000 (UTC), beamendsltd
<beamendsltd@btconnect.com> enlightened us thusly:

>In message <424b9c78$0$42312$ed2619ec@ptn-nntp-reader02.plus.net>
> "John" <john@tollick.plus.com> wrote:
>
>> Rear RH caliper outer piston does not apply same pressure as inner piston
>> resulting in vehicle pulling to left on braking. Inside of caliper cylinder
>> and sides of old piston showed no signs of wear to me on examination though
>> outer piston was a "tight fit"(this was original problem (and badly worn
>> disc on that side too).)
>> (new pistons and seals to caliper on RH wheel, and new discs to both rear
>> wheels.)
>> Vehicle still pulls to left on braking despite new parts.
>>
>>
>> Should I bite the bullet and fork out for a new caliper?

>
>That's certainly an option - possibly the easiest
>
>> Do I need to replace LH one at same time?

>
>Not if it working ok
>
>> Do these parts come complete with seals and pistons in situ?

>
>Yes - on the whole
>
>>
>> Anyone know what part number I need?
>> I have seen:-
>> Rear RH (Late) STC1264#105050 @ 50.40
>>
>> Rear RH RR,DS RTC5889#105051 @ 90.68
>>
>> My Disco is :- 94 Discovery 300tdi (reg 20/6/94)

>
>The two above are from Axle No. 28S44172D and to Axle No. 28S44171D
>repectively. I'd guess that uors is the former, but I couldn't be
>certain.


Paddock's list has 2 sets of numbers, 38S and 32S series. dunno if they're
right, mind... the 38S one matches the serial number you have.

might be that one set are for exports or something.


--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
In Touch: Get in touch with yourself by touching yourself.
If somebody is watching, stop touching yourself.
from the Little Book of Complete B***ocks by Alistair Beaton.
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Old 03-31-2005, 07:01   #6 (permalink)
beamendsltd
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Posts: n/a
Re: DS Brake caliper saga

In message <d2gn41le53407h38tu8q75oibph5fjtqtv@4ax.com>
Austin Shackles <austinNOSPAM@ddol-las.net> wrote:

> On or around Thu, 31 Mar 2005 08:14:26 +0000 (UTC), beamendsltd
> <beamendsltd@btconnect.com> enlightened us thusly:
>
> >In message <424b9c78$0$42312$ed2619ec@ptn-nntp-reader02.plus.net>
> > "John" <john@tollick.plus.com> wrote:
> >
> >> Rear RH caliper outer piston does not apply same pressure as inner piston
> >> resulting in vehicle pulling to left on braking. Inside of caliper cylinder
> >> and sides of old piston showed no signs of wear to me on examination though
> >> outer piston was a "tight fit"(this was original problem (and badly worn
> >> disc on that side too).)
> >> (new pistons and seals to caliper on RH wheel, and new discs to both rear
> >> wheels.)
> >> Vehicle still pulls to left on braking despite new parts.
> >>
> >>
> >> Should I bite the bullet and fork out for a new caliper?

> >
> >That's certainly an option - possibly the easiest
> >
> >> Do I need to replace LH one at same time?

> >
> >Not if it working ok
> >
> >> Do these parts come complete with seals and pistons in situ?

> >
> >Yes - on the whole
> >
> >>
> >> Anyone know what part number I need?
> >> I have seen:-
> >> Rear RH (Late) STC1264#105050 @ 50.40
> >>
> >> Rear RH RR,DS RTC5889#105051 @ 90.68
> >>
> >> My Disco is :- 94 Discovery 300tdi (reg 20/6/94)

> >
> >The two above are from Axle No. 28S44172D and to Axle No. 28S44171D
> >repectively. I'd guess that uors is the former, but I couldn't be
> >certain.

>
> Paddock's list has 2 sets of numbers, 38S and 32S series. dunno if they're
> right, mind... the 38S one matches the serial number you have.
>
> might be that one set are for exports or something.
>
>


Thats right - I've just not got them on the system yet!

Richard
--
www.beamends-lrspares.co.uk sales@beamends-lrspares.co.uk
Running a business in a Microsoft free environment - it can be done
Powered by Risc-OS - you won't get a virus from us!!
Helping keep Land Rovers on and off the road to annoy the Lib Dems
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