When I remove the valves of a piston tuba, do I remove the spring also?
Yes. When cleaning the tuba (in the sense of a full cleaning of the instrument), you should also take out the springs in order to clean properly. This is for more easily cleaning both the springs and also the bottom interior of the housing.
Short answer, no.
- To oil it, first unscrew the top valve cap and remove piston.
- Next wipe off the old oil.
- Apply the new oil to the piston.
- Replace piston to valve casing and re-screw top valve cap.
- Screw the finger-piece clockwise until it stops. This aligns the piston correctly in the casing.
- Press and depress key quickly to work oil around.
You don't need to remove the spring. However, a little oil on it won't go amiss.