load sensing valve

[JohnM]

The load sensing valve is there to stop the arse-end locking up under heavy braking on an unladen van. The car version has a pressure reducing valve. The consequence of the rear locking up is that the van is likely to spin as the locked wheels have a tendency to try and come round to the front. Not quite F-k all difference.

[CourierJim]

Always follow the rule : "If it ain't broke, don't fix it!". It's there for a good reason.

[timpascoe]

Its easy to free up and there is a new spring available on ebay. Its a simple job but access makes it very fiddly. Removing spare wheel and right side rear wheel helps, as does very good lighting. The old spring is best cut off with a good quality fine hacksaw blade rather than trying to move the old adjuster with the hex nut in it.

[Manu14]

Hello, I am a vehicle technical inspection operator, and the best thing you can do is go directly to have it cleaned at a dealership or an itv, greetings

[oilyrag]

If rear brakes lock 'prematurely' you'll more than likely run out of talent, lose control and have a big accident - hardly worth it when the real solution is to fix the thing properly.  

[Kyleonsite]

Just done mine getting it ready for its MOT. Bought the Ebay replacement spring.
My load sensing valve was seized in position, penetrating spray and a bit of wiggling had it moving again. Managed to remove the torx grub screw from the old spring.
Easy job but I have long thin fingers!
Top tip for installing the adjusting nut (or any nut in difficult to reach positions where you can turn the bolt) - cover the ring end of a spanner with kitchen roll/small piece of cloth/paper etc and push the nut through the material into the ring end of the spanner thus trapping and stopping the nut falling out of the spanner.