Yamaha Tubas Owner's Manual - Page 12

Maintenance ■ After Playing After playing the instrument, make sure that moisture or dirt is removed from it using the procedure described below. ● Valve slide maintenance 1. Depress the piston or lever that corresponds to the valve slide you want to clean, and remove the slide. ● Oil the pistons As done before playing the instrument, apply some valve oil to the pistons and move them up and down a few times. (See page 24) ● Oil the rotors (Rotary tuba only) As done before playing the instrument, apply some rotor spindle oil to the rotors and move the levers a few times. (See page 24) * Removing the valve slide without holding the piston down creates a drop in air pressure within the pipe, creating a suction which can result in poor piston function or damage to the inside of the pipe. 2. Remove moisture from the slide. Also, re- move moisture from the water key. ● Body maintenance Use a polishing cloth to gently wipe the instrument's surface. If dirt or tarnish is obvious, the following products can be used. For lacquer finishes Polishing cloth + lacquer polish For silver plate Silver cloth + silver polish For a beautiful shine, buff the instrument with a silicone cloth. Water Key * The valve slides are made of brass or nickel silver which are both excellent at resisting corrosion. However, corrosion may appear if moisture is left in the instrument for an extended period of time. Please use caution. 28