Thread: Replacing shuttle valve switches & need Nanocom

I noticed that the comments I added to images do not appear unless you view images as a slideshow. As this is the first time I have used Members Gallery to upload photos maybe I did something wrong. Set slide show for at least 8 seconds.
Brakes are now working better than I can ever remember. The colour of the brake fluid drained during bleeding was quite dark & murky looking. Possibly never changed since last modulator repair 5 years ago. I read somewhere that Wabco recommend 25000K fluid replacement. Pedal is firm with good response & feedback.
Cheers..B

Originally Posted by bruiser69

Finally took the chance after receiving Shuttle Valve Switch & seal Upgrade kit today & removed ABS modulator after arranging with 'harlie' to provide Nanocom. Couldn't source the Castrol GT-LMA fluid, but after Google search settled on Castrol Response Super Dot4 which is basically the same synthetic high performance brake fluid designed for high tech ABS systems.
The hardest part, after removing Wabco ABS block, was the installation of the upgraded shuttle valve seal kit from Falconworks Message - AULRO Photo Gallery

After the removal & reinstallation of the shuttle valves (with seal kit) it was a breeze!
Not that I doubted Falconworks advise that the seal upgrade kit would resolve the SVS issue for at least 100K, But decided to PERMANTLY seal the top and bottom of the switch boots with Loctite 596 RTV. The switch that had failed (Max pressure) was full of brake fluid.
We did the stamdard brake bleeding (In -Out with spanner on bleed screw draining into Coke bottle) with engine running on all 4 wheels followed by the Nanocom Modulator bleed , which delivered a nice creamy mixture before running clear after several retries.
Very happy.

Southside LR quoted me $1800 for modulator repair. The Falconworks Shuttle Valve Switch kit, including upgrade shuttle valve seal kit, cost me $US154 delivered (7days).
IMHO if anyone replaces shuttle valve switch assy without doing seal upgrade , they are asking for trouble. Just check out the amount of fluid that caused the damage to my already replaced SVS assembly .
If anyone wants to do this check out the link & PM me if not sure.

Cheers..B

hey bruiser, i sent you a pm too but i'll try this way as i am that desperate.
i searched the web hi and low and i think you are the only one in the world who has actually done the seal repair along with the shuttle valve switch repair, so i joined this forum just to look at your pics. i usually hang out at landroversonly.

i got my shuttle valves out to install the seals from falconworks and to my surprise i could find no existing seals. i tried to take a look at your pics but there is not a clear pic of where the seal actually goes.

i've done the abs repair of bypassing the shuttle valve circuitry and here i sit with my modulator still cracked open. too scared to re-install the shuttle valves because i may have the seals in the wrong place.

so here are the parts. the little black washer is the new seal. the rest are all old parts
parts 2.jpg

i'm guessing it goes over this shaft
over this shaft 2.jpg



and rests here and the spring retains tension against the seal
i think it goes here 2.jpg


i'm not sure where my seals went but my SVS was definitely covered in dot4.

any help from anyone would be greatly appreciated.