Yamaha YOB-431 Manual del usuario - Página 6

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Before You Play

Handling the Instrument

The instrument is made of a thin metal so please handle it with care. Do not apply any

excessive force to the instrument, or bump it in a manner that will dent or damage it.

■ Attaching the Screw-On Bell

When attaching the screw-on bell, always hold

the bell by its mid section and assemble. Do

not over-tighten.

■ Lubrication

Oiling the Rotors

While holding the levers down, remove the

valve slides then apply rotor oil to the ro-

tors as shown in the illustration below (a

few drops per rotor).

* Apply oil if the lever does not work

smoothly.

* When applying oil, do not let the oil mix

with the slide grease adhering to the valve

slide's interior.

Move the levers so that the oil is spread

evenly.

■ Attaching the Mouthpiece

Gently insert the mouthpiece into the

mouthpipe.

* Never force the mouthpiece into the

mouthpipe. The mouthpiece may become

stuck in the mouthpipe.