Wiper Control Air Leak

[chessie4905]

The "valve body" as it's called is where the air lines connect. They are some trpe of plastic or nylon. As they age, they crack where the fittings thread in and eventually leak air. Before they get to that point, you can put a small screw type hose clamp around the threaded port opening to keep crack/s from spreading to eventually leak. Mohawk used to carry replacement valve bodies for around $60.  I had one that was cracked enough to leak and robbed one from my 4905 parts coach. I discovered the older valve bodies were cast metal and much less susceptible to cracking.