After oiling the valves, the keys(1 & 2) stay down. They worked ok before oiling.
Md Ariful Islam
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,
এমবিএ(মার্কেটিং)
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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
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পিজিটি(মেডিসিন)
Be sure the valves were not damaged during oiling; the tiniest dent can cause valves to stick. If the valves have not been damaged, remove the sticking valves and wipe them clean with a cloth, re-oil them, and return them to the instrument. Sometimes gunk or debris can cause the valves to stick.
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