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Man On The Clapham Omnibus

Westfield Tandem Master Cylinder

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Man On The Clapham Omnibus
My brakes are spongy and the pedal goes well down to nearly the end of its travel. I have bled the system extensively and still the pedal is 'soft'. In the master cylinder reservoir there is a sort of black particulate matter which I assume is rubber from the seals which are probably over ten years old. The car (SEiW) was built in 1994 and has top mounted pedals with a standard Westfield supplied master cylinder. I think the cylinder seals should be replaced but Westfield quote only for a new complete cylinder here. Is it possible to buy a repair kit from a parts supplier? What car does the cylinder come off so I can order it?

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Man On The Clapham Omnibus

The answer to the above is that a repair kit is available for the standard Westfield tandem Girling type master cylinder. The old Girling number for the kit is SP7657 and the kit is made by Past Parts click here under their part number 17-1032. So if your master cylinder has Girling written on it and looks like the one on the Westfield site, and its casting number (underneath) is 74660152, this kit should be for you. I got mine from LCP Automotive in High Wycombe - branches all over the home counties.

Not having yet fitted mine at the time of writing, your mileage might vary, as they say. The storeman did say it was an equivalent and the 'proper' one might be SP7693

Further edit after speaking to the man at Past Parts. The only difference, he tells me, between this kit 17-1032 and the 'proper' kit is the seal for the reservoir  cap. Hardly important. I really must recommend Past Parts for their customer service. :t-up:

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AdamR

I realise this is a huge bump, but just wanted to say thanks for the above info - got a 17-1032 kit through today. Price was relatively high (£30 once VAT and postage had been taken care of) but hoping it does the trick! Thanks again.

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Man On The Clapham Omnibus

Adam, I hope it does too because as time passes, these things will become harder to source...

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AdamR

True - almost makes an upgrade to twin masters and a bias bar look like a more efficient solution all things considered...!

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Rogers79

Hi, I'm looking to put bias brakes in my megabusa, does anyone know what size front and rear master cylinders I need to buy? I did it years ago but have forgotten. 

Thanks jez 

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Tim (TimDave25) - Joint Thames Valley AO
On 09/03/2017 at 21:50, Rogers79 said:

Hi, I'm looking to put bias brakes in my megabusa, does anyone know what size front and rear master cylinders I need to buy? I did it years ago but have forgotten. 

Thanks jez 

0.625 front and 0.7 rear. Which seems to be the standard choice. 

Some useful info here: http://www.stoptech.com/docs/media-center-documents/pedalsetup-dualmaster-guide

 

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thall1

Hi, new to the site, I've got an '89 SE that I built. I've put it back on the road after 15 years stored. New pads and seals fitted to the brakes but the brakes are shocking compared to modern cars!.. its fitted with a non servo Cortina mk3 so I appreciate its never going to be brilliant but id like to get it better. I suspect the master cylinder bore is worn and despite new seals the brakes always feel spongy and pump up on braking. It'll be a shame to replace it as I made a stainless reservoir to replace the plastic 'spigot' type that was originally fitted which required mods to the cylinder body to achieve a leak free, removable reservoir.  Do any of you know of a modern 19.0mm bore master cylinder and reservoir that will fit without modification to the mounting holes?

westfield2.jpg

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Mighty Mart

Thall1,

that looks very clean and tidy mate...a credit to you IMHO.

hope it's back on the road soon!

Mart.

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thall1

hi Mighty Mart. thanks for the nice comments...its not bad for almost 30yrs old!..its on the road, has been since 2015, not that I use it much...just a couple of hundred miles or so each year now...its only got just over 16000 on it now...just a shame it doesn't stop!...it may be that there isn't much wrong with it but its been so long off the road I may have forgotten how bad it is!..

westfield.jpg

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Mighty Mart

To be honest, being so light, the brakes 'should' be very good. Even reasonably big power shouldn't need big brakes IMHO.

my m16 calipers and drums on the back work as well as any car I've had actually...think I've got mintex 1144 pads on the front though.

Mart.

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thall1

different pads on the front was another thought... I may go down that route first...thanks for the info on yours...

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Martin Letts - AO Hampshire and Isle of Wight

Sorry for leaping on your bandwagon, but could you cast any light on my master cylinder ie where can I get a new one, it is off a 1989 narrow, any help gratefully received

19BE1EFB-E383-4C81-B3EA-288C6E7C1B8A.jpeg

233D6130-A209-4F30-A0BF-A3FFC5D8E9F1.jpeg

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Man On The Clapham Omnibus

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Dave Eastwood (Gadgetman) - Club Secretary

From previous posts, I have a feeling it was rebuild kits only on that one. I’ve a vague memory that one of the specialist might be able to recondition them, including re-sleeving the bore. But that’s about it.

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