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Position of Brake Proportioning Valve / Hydraulic Handbrake
scootz - 17/9/17 at 12:17 PM

Is there a preferred place to put a brake proportioning valve in the rear brake line when also using a hydraulic handbrake?

Before the hydraulic HB? After it? Doesn't matter?

Cheers

adithorp - 17/9/17 at 12:34 PM

I'd say valve then h/brake so the valve doesn't reduce the pressure from the h/brake.

Hydraulic hand brake won't pass IVA though (or MOT) and I'm not sure how proportioning valves are treated.

scootz - 17/9/17 at 06:26 PM

Cheers Adi. No MOT / IVA worries.

voucht - 18/9/17 at 10:59 AM

Hi,

Check this document, pages 27 to 33. I did these 3D drawings myself for this French company which is specialized in hydraulic systems for racing cars.

There's a lot of different installation 3D drawings according to the configuration of your braking system, and you'll find your answer there.

https://www.exactfrance.com/pdf-cata/cata2015_chap5.pdf

Hope that will help

Cheers.

Sylvain

Angel Acevedo - 18/9/17 at 04:23 PM

quote:
Originally posted by scootz
Is there a preferred place to put a brake proportioning valve in the rear brake line when also using a hydraulic handbrake?

Before the hydraulic HB? After it? Doesn't matter?

Cheers


Late to the party, but, I would put the H/B last to have the least amount of connectors therefore less chance of leak/failure as H/B serves (on some cars) double duty as Emergency brake.

scootz - 18/9/17 at 05:20 PM

Thanks guys