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Korg C-3500 Piano Sticky keys and lubricant

Hi and thanks for your help!!
I live in Khartoum, Sudan. The church here owns the Korg C-3500. Some of the keys have been sticky and they were hoping I could fix it. I am a music teacher in a senior high school here. There are no technicians to bring in to receive 'factory' help. Upon taking it all apart, I discovered the rub points between the key and the counter balance were incrediably dirty with a heavy grease and loads of Sudanese desert dust. The dust is legendary here and is a consistant source of income for the local cleaning people. Looking at the parts, my first thought was the problem was all this dust encrusted grease and that some one maybe here in Sudan thought to grease the keys to solve the same problem I was trying to fix, namely sticky keys. So, I washed and scraped everything to as clean as possible. I reassemblied everything, and to my amazement, more keys were slow, sticky or just stayed down. So this led to the idea that the heavy grease must be factory applied (without the dust, of course). So the questions are: 1) Am I correct that the grease is factory applied? 2) If so, then what kind of grease will work best 3) Can you send it to me ASAP?

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Hi. I saw this looking for info on the C3500 of which I own one myself. I don't know the answer to your question but I found a site where you may buy a downloadable c350 service manual for $45. Go here,

/Mats Rahm

Posted on Oct 19, 2009


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