My first valve of my trumpet will not go all the way down, I can't

How to Use the First and Third Valve Slides on the Trumpet

One of my trumpet valves gets stuck on its way up while I blow the horn. Is this a sign of dirt build up or damage to the valve casing? What can

I'm confused. I never played the trumpet before. When I get my trumpet for the first time, do I have to tune it? If so, how? - Quora

Why is my valve not going on my trumpet? - Quora

How To Fix Trumpet Valves

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I was taking my valves out for oiling and the 3rd one got stuck. I pulled it really hard out and it looks like the little plastic bit broke (the left one

Does the 2nd slide need replaced? It has dents, but it doesn't effect the sound. : r/trumpet