Vehicle & Technical > Series Land Rovers
What's this bit called?
paulmmc:
What is the proper name for this part of the brake system from my S3? Is it a shuttle valve?
Thanks, Paul
MudLifeCrisis:
Sorry can't answer the question but nice to see someone else from St Albans on here.
Brian
TBM:
http://www.lrseries.com/shop/product/listing/14123/NRC4880-BRAKE-SYSTEM-PDWA-VALVE.html?search=nrc4880&page=1
Often called a Shuttle Valve but correctly called a PDWA valve. Part number NRC4880
They can cause problems when bleeding and many bypass them.
bogie:
Far as i know it aint a good idea to bypass the shuttle valve as it loweres the pressure to the rear brakes so ur back end doesnt kick out when braking hard and if your rear brake line gets damaged it isolates the front so you still have front brakes to stop,but dont hold me on this !
TBM:
--- Quote from: bogie on October 25, 2009, 18:48:06 ---Far as i know it aint a good idea to bypass the shuttle valve as it loweres the pressure to the rear brakes so ur back end doesnt kick out when braking hard and if your rear brake line gets damaged it isolates the front so you still have front brakes to stop,but dont hold me on this !
--- End quote ---
It doesn't lower the rear pressure but it does isolate the front or rear circuit if there's a break in a line. Bypassing turns it into a standard single line circuit like on the older Land Rovers.
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