- Apply a penetrating oil, such as WD-40, to the stuck valves.
- Let the oil sit for a few minutes.
- Note: Be sure to use a penetrating oil that is specifically designed for musical instruments. Some general-purpose penetrating oils may damage the finish of your trumpet.
2. Work the valves back and forth.
- While holding the valve in one hand and the trumpet with your other hand, very gently but firmly work the valve back and forth slowly and repeatedly until it loosens.
- After the valve loosens completely, rinse the valve with clean water to remove any residual oil.
Note: Do not force the valve. If it doesn't move easily, let the oil sit longer.
3. Use a rubber mallet (if necessary).
- If the valves are still stuck after trying the above methods, you can carefully tap the valve stem housing and valve guide area of the trumpet with a rubber mallet.
- Again, be careful not to hit the trumpet too hard, as you could damage it.
4. Take the trumpet to a professional repair technician.
- If you are unable to remove the valves yourself, you should take the trumpet to a professional repair technician. They will be able to remove the valves safely and make any necessary repairs.
5. Lubricate your valves regularly to avoid sticking
- Trump valves get stuck because of old and dried lubricants, that is why it is recommended to lubricate your trumpet valves regularly with 1 drop of a good quality trumpet oil such as Al Cass or Hetman in each piston.