[Junkyard Dawg]

I have a combo valve for a 4 wheel power drum set up....can it be used on a 4 wheel disc set up? Or is it only good for drums? Thanks.

 

[engineer]

only good for drums or for disc setup when additional prop. valve added.

 

[Philip]

The drum valve probably won't work with a disc set up due to the small size of the fittings the drum system used. The four wheel disc valve I removed from a 82 Cadillac had no proprtioning valving only the the shuttle for the brake warning light. This model had the same size caliper pistons front and rear so it may not have needed any proportioning.