Re: PT Valve Problems...?


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Posted by big joe jackson on November 25, 2002 at 01:07:11:

In Reply to: PT Valve Problems...? posted by Matt A on November 24, 2002 at 23:52:08:

I have had my rotary valves stop and or become very stiff a few times on my VMI Tubas.
I simply backed off the bottom valve covers. It appears that if the valve covers are on too tight, the rotors will bind up. Both of my tubas are B&S/VMI, and I have had this problem on both horns. I think that the spidle falls down, this may be caused by the expansion and contraction rates. Try backing off all of your valve covers, put some heavy oil on the insides of the valves, and also on the threads of the valve covers. This may help. Good luck.


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