Yamaha Alto Horn, Baritone, Euphonium Gebruikershandleiding - Pagina 13
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■ Once or Twice a Month Main-
tenance
●
Piston and valve casing maintenance
The pistons and valve casings are designed with
very little clearance between each other there-
fore, it is very important that these precision
parts be handled with care.
1.
Wrap a cleaning rod with gauze so that no
metal is exposed.
Cleaning rod
Gauze
* Exposed metal can damage the instrument.
2.
Remove dirt from the inside of the valve
casings.
* In models that are equipped with valve
springs under the valves, remove the
springs from the valve casing before
cleaning.
3.
Use the gauze to remove dirt from the pistons.
The piston is the most important part of
the instrument. Never treat the pistons
roughly, drop the piston, or let the pis-
ton fall, etc. If the piston becomes dam-
aged or dented, never return it to the
valve casing. Contact the dealer from
whom you purchased the instrument.
Maintenance
4.
After applying valve oil, gently return the
piston to its corresponding valve casing. At
this time, make sure that the valve guide
properly fits into the notch.
After firmly tightening the valve cap, move
the piston up and down a few times to dis-
tribute the oil evenly.
* Do not apply too much oil.
* Make sure that the number stamped on the
valve casing matches the number stamped
on the piston.
●
Rotor and valve casing maintenance
As done before and after playing, apply some
rotor spindle oil to the rotors and valve casing.
Also, apply some lever oil to the lever shaft.
29