35 replies to this topic

[dklawson]

You shouldn't need the regulator on the rear frame. This was only used on the single line brake systems prior to 1977. A plain tee would have been standard on your car.

That is not entirely true. The valve on the rear subframe limits the pressure to the rear wheels so they do not lock up prematurely. If the rear wheels lock before the fronts, you loose all stability and the rear end of the car will come around in a panic stop. Removing the valve from the subframe can therefore be dangerous.

Keep the part on the subframe and swap the front calipers left to right and you will be OK.

[mattyb]

I see your problem now! you've not got a master cylinder

#]#

Ha Ha ! (but thanks !)

Matt

[Artstu]

You shouldn't need the regulator on the rear frame. This was only used on the single line brake systems prior to 1977. A plain tee would have been standard on your car.

That is not entirely true. The valve on the rear subframe limits the pressure to the rear wheels so they do not lock up prematurely. If the rear wheels lock before the fronts, you loose all stability and the rear end of the car will come around in a panic stop. Removing the valve from the subframe can therefore be dangerous.

Keep the part on the subframe and swap the front calipers left to right and you will be OK.

No it is true

[dklawson]

No it is true

Don't want the valve on the subframe? It is there for a safety and has a purpose. You might be able to take it off and drive without issue for years if you are gentle. However, get in a panic situation where you jam on the brakes and you are likely to be in for a surprise. It's your car though, do as you see fit.

[Jackamilf12]

dklawson is right, i do not have the valve on the subframe and have had the misfortune to lock the rear before the fronts
however i havnt tested the rear valve system dont plan too either

[mk=john]

dklawson is right, i do not have the valve on the subframe and have had the misfortune to lock the rear before the fronts
however i havnt tested the rear valve system dont plan too either

Do NOT comprimise your safety if you are AT ALL unsure about anything in the braking system. Taking shortcuts in other less dangerous things like clutch, trim, paint you can live with!!!.
There must be someone on here who lives local to you who might be willing to pop around to check out your brake setup in return for a jar or two!!

Edited by mk=john, 02 November 2010 - 06:13 PM.

[tommy13]

Just to add to the confusion, I do not recall the regulator valve you have pictured on the rear subframe, being fitted after the MK3. This seems to be confirmed by the Minispares website.

http://www.minispare...=...8629&title=

In addition, the pressure reducing valve on the bulkhead, and you thinking you have a front / rear split system tie in with this brake arrangement depicted on Somerford's mini website.

http://www.somerford...x...=page&id=65

As you will see there is only a T piece shown in this diagram at the rear subby. While I agree with all the others that some method of limiting the pressure to the rear is necessary, I don't think you need two in the line ( assuming that is what the front one does)
There has been a lot of confilcting information in the posts to this topic, some of it obviousley wrong and i would urge you to seek further info from someone who would know for sure. mra-minis.co.uk on here perhaps?.

Edited by tommy13, 02 November 2010 - 07:13 PM.

[mattyb]

Just to add to the confusion, I do not recall the regulator valve you have pictured on the rear subframe, being fitted after the MK3. This seems to be confirmed by the Minispares website.

http://www.minispare...=...8629&title=

In addition, the pressure reducing valve on the bulkhead, and you thinking you have a front / rear split system tie in with this brake arrangement depicted on Somerford's mini website.

http://www.somerford...x...=page&id=65

As you will see there is only a T piece shown in this diagram at the rear subby. While I agree with all the others that some method of limiting the pressure to the rear is necessary, I don't think you need two in the line ( assuming that is what the front one does)
There has been a lot of confilcting information in the posts to this topic, some of it obviousley wrong and i would urge you to seek further info from someone who would know for sure. mra-minis.co.uk on here perhaps?.

All

As per kams post - My mini should (and does) have the later type bulk head mounted pressure mounted reducing valve fitted (early bulkhead mounted valves were only a low fluid warning valve and not a regulating valve)- its also had fitted on the rear sub frame an ADDITIONAL PRESSURE REGULATING VALVE. It shouldn't have both - I've removed the sub frame mounted valve and replaced it with a "t" piece. The bulkhead valve ramains in place.
I have today correctly fitted the calipers and have bled the brakes and the brakes now perform as i would expect.
The car will be MOT'ed and brake tested prior the use

regards

Matt

[Carlzilla]

Just to add to the confusion, I do not recall the regulator valve you have pictured on the rear subframe, being fitted after the MK3. This seems to be confirmed by the Minispares website.

http://www.minispare...=...8629&title=

In addition, the pressure reducing valve on the bulkhead, and you thinking you have a front / rear split system tie in with this brake arrangement depicted on Somerford's mini website.

http://www.somerford...x...=page&id=65

As you will see there is only a T piece shown in this diagram at the rear subby. While I agree with all the others that some method of limiting the pressure to the rear is necessary, I don't think you need two in the line ( assuming that is what the front one does)
There has been a lot of confilcting information in the posts to this topic, some of it obviousley wrong and i would urge you to seek further info from someone who would know for sure. mra-minis.co.uk on here perhaps?.

All

As per kams post - My mini should (and does) have the later type bulk head mounted pressure mounted reducing valve fitted (early bulkhead mounted valves were only a low fluid warning valve and not a regulating valve)- its also had fitted on the rear sub frame an ADDITIONAL PRESSURE REGULATING VALVE. It shouldn't have both - I've removed the sub frame mounted valve and replaced it with a "t" piece. The bulkhead valve ramains in place.
I have today correctly fitted the calipers and have bled the brakes and the brakes now perform as i would expect.
The car will be MOT'ed and brake tested prior the use

regards

Matt

Cool, im glad learning from my mishap has helped somebody. Good news that youve sorted it fella

[Kam]

As per kams post - My mini should (and does) have the later type bulk head mounted pressure mounted reducing valve fitted (early bulkhead mounted valves were only a low fluid warning valve and not a regulating valve)- its also had fitted on the rear sub frame an ADDITIONAL PRESSURE REGULATING VALVE. It shouldn't have both - I've removed the sub frame mounted valve and replaced it with a "t" piece. The bulkhead valve ramains in place.
I have today correctly fitted the calipers and have bled the brakes and the brakes now perform as i would expect.
The car will be MOT'ed and brake tested prior the use

Nice work Matt, its a PITA sorting out other peoples work, worse if they are not clued up

Good luck with the MOT

[mattyb]

As per kams post - My mini should (and does) have the later type bulk head mounted pressure mounted reducing valve fitted (early bulkhead mounted valves were only a low fluid warning valve and not a regulating valve)- its also had fitted on the rear sub frame an ADDITIONAL PRESSURE REGULATING VALVE. It shouldn't have both - I've removed the sub frame mounted valve and replaced it with a "t" piece. The bulkhead valve ramains in place.
I have today correctly fitted the calipers and have bled the brakes and the brakes now perform as i would expect.
The car will be MOT'ed and brake tested prior the use

Nice work Matt, its a PITA sorting out other peoples work, worse if they are not clued up

Good luck with the MOT

cheers Kam

a fair way off getting an MOT but really chuffed to have sorted the brakes and clutch ! both have an excellent feel to them - starting to tune the engine - timing was way out but I've strobed timed it (but must admit, havn't checked the points !) so will check them and re do the timing.

bought a gunson "click adjust" to do the tappets - been meaning to buy one for ages so hoping for good results !

all the best

Matt

[mattyb]

Just to add to the confusion, I do not recall the regulator valve you have pictured on the rear subframe, being fitted after the MK3. This seems to be confirmed by the Minispares website.

http://www.minispare...=...8629&title=

In addition, the pressure reducing valve on the bulkhead, and you thinking you have a front / rear split system tie in with this brake arrangement depicted on Somerford's mini website.

http://www.somerford...x...=page&id=65

As you will see there is only a T piece shown in this diagram at the rear subby. While I agree with all the others that some method of limiting the pressure to the rear is necessary, I don't think you need two in the line ( assuming that is what the front one does)
There has been a lot of confilcting information in the posts to this topic, some of it obviousley wrong and i would urge you to seek further info from someone who would know for sure. mra-minis.co.uk on here perhaps?.

All

As per kams post - My mini should (and does) have the later type bulk head mounted pressure mounted reducing valve fitted (early bulkhead mounted valves were only a low fluid warning valve and not a regulating valve)- its also had fitted on the rear sub frame an ADDITIONAL PRESSURE REGULATING VALVE. It shouldn't have both - I've removed the sub frame mounted valve and replaced it with a "t" piece. The bulkhead valve ramains in place.
I have today correctly fitted the calipers and have bled the brakes and the brakes now perform as i would expect.
The car will be MOT'ed and brake tested prior the use

regards

Matt

Cool, im glad learning from my mishap has helped somebody. Good news that youve sorted it fella

many thanks to you carzilla - took me a while to get there and it just goes to show what a great help these forums are !

cheers

Matt

[toromod]

It's great scrolling through forums when working on our cars and things aren't going right, there's always an answer!
I'm beginning to refit items on my 68 Elf restoration, it will be close to standard when finished - my question is regarding the pressure regulating valve on the rear subframe, since it will retain the single line braking setup can I fit a tee-piece on the subframe and fit the regulating valve on the engine bulkhead? Same pressure in the line from front to rear- any thoughts?

[Spider]

Yes, you can for sure. It can be fitted anywhere in the Front to Rear Line. As it has 2 outlets, you can simply fit either a Plug or a Disc Brake / Clutch Slave Bleed Nipple in to the unused outlet.

[alpder]

Consider the mounting orientation if installing in a non-standard position: it would seem convenient - for running the pipes - for the inlet to be on the side and the single (unsealed) outlet to be pointing downwards on the bulkhead. But that might risk a large bubble remaining inside the valve after bleeding. Tho' if you did use a bleed nipple to seal the 2nd outlet, it could be used to bleed the bubble out.

 

I've bought two of these valves recently in the UK. Both of them have 'volcano' seats inside the outlet ports (but, oddly, not the inlet port). Don't know whether these will work well with bleed nipples?