Yamaha Cornets Owner's Manual page 12

Maintenance
■ Twice Yearly Maintenance
● Cleaning the instrument
1.
Make a brass soap water solution.
Prepare a brass soap water solution using
between 10 to 15 parts warm water (30° to
40° C) and 1 part brass soap. Before putting
the instrument into the soap water solution,
remove the pistons, valve casing covers,
slide valves.
2.
With the instrument removed from the wa-
ter, apply some soap water solution to a flex-
ible cleaner and use the cleaner to clean the
inside of the instrument's pipes.
Flexible cleaner
3.
After cleaning the instrument, use clean
water and thoroughly rinse out the brass
soap water solution. After that, apply valve
oil and slide grease and reassemble the in-
strument.
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● Cleaning the mouthpiece
1.
Dip the mouthpiece brush in the brass soap
water solution and clean the mouthpiece
throat with the brush. Rinse the mouthpiece
out with clean water.
Mouthpiece brush