Replacing valve felts, washers and springs

[davewerden]

Replacing valve felts, washers and springs

Is the #4 felt roughly the same thickness of the black washer on 123? If so, I would temporarily swap and put a black rubber washer on 4. See if it is quiet then. If so, it's a good clue!

[prototypedenNIS]

Replacing valve felts, washers and springs

Are your cap threads loose? Grease threads.
Definitely swap the felts and check to see whether that felt is just too thin.
4th valve generally end up being different for several minor parts for 3+1's. Different sized caps, different thicknesses of felts, different width of spring.
Check to make sure the finger button is tight, that the valve cap isn't cross threaded.

Let us know if anything fixes it or if you find any other symptoms!

[Roger]

I realize I'm responding to an old post, but it caught my eye when browsing topics. I'm getting valve "thump" on my Adams E1 and assume I need new felts. Are they sold already sized for a particular instrument model, or are they cut to size from a sheet? And is replacing them best done by a tech?

[davewerden]

I realize I'm responding to an old post, but it caught my eye when browsing topics. I'm getting valve "thump" on my Adams E1 and assume I need new felts. Are they sold already sized for a particular instrument model, or are they cut to size from a sheet? And is replacing them best done by a tech?

I advise contacting your Adams dealer and getting a replacement set. Note that they are usually supplied in 2 plastic bags, one with 7 pads plus one with a single pad. The latter is for the top of the 4th piston, and is slightly thinner than the others. If the thumb happens when you press down, you might want to order a set of the valve-cap rings as well.

[Roger]

Thanks, David.

[Cameron J.]

Springs - normally every six months. Reason I replace them often is due to the plastic coating wearing off the Yamaha factory springs.
Felts - normally every six months as well.
Water key corks - once a year.
Valve guides - haven't had to repalce them yet!