Air operated dump valuve

[jerry_94110]

Hello,
I purchased "Free Bird" around 3 months ago and final was able to take her out
on our maiden voyage. I had all the shocks and air bags replaced and had all the
mechanicals check out at ABR (American Bus Repair) located in Alameda, CA. Great
place to have work done if you are ever in the area.

The maiden voyage went well. We took her from San Francisco to Lake Tahoe. I was
amazed at how many complements we received. I came across one issue when it was
time to dump the tanks. Both gray and black dump valves seem to stick. I had to
pull (quite hard) on the black round knobs to get them open. I also noticed that
after I closed them, the black valve continued to leak air.

My questions is do these valves need to be lubricated so that they don't sick
and also, how do I fix the air leak? Or should I just buy new valves? I located
power twis-loc valves on dupree products website. is this the correct valve to
replace them with?

Any help would be appreciated.

Jerry Kocher
1987 PT38
San Francisco, CA