Acoustic Piano Checklist

Quality is a top priority at Joh.deHeer. Our piano technicians work with great passion and enthusiasm on your instrument before we deliver it. Every acoustic piano we supply is therefore very thoroughly checked, repaired and cleaned where necessary. We understand that you are interested in what actions are performed on the pianos and that is why we are happy to present our checklist. All pianos that leave us have been checked on the basis of the list below.

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View our collection of Yamaha pianos 

The Joh.deHeer Piano Checklist

• Cleaning and polishing the housing and brassware. No damage unless they have been properly repaired.
• Cleaning inside of the piano.
• Clean and grease/spray keyboard pins.
• Cleaning the sides of the white keys (only visible when adjacent keys are pressed)
• The wood under the top of the black keys should be black and not have a white edge of wear.
• Waste must be correct.
• All springs must be intact and in good working order.
• Half course should be good (not too early and not too late)
• When using the right pedal, the dampers should come off in line as closely as possible.
• Hammer heads have been sanded or renewed and the last discant hammer heads must still have enough felt.
• Keyboard must be straight/flat (both white and black keys).
• The keys have no freeplay on the pins and do not clamp, but run smoothly over the pins.
• There is no moth in the piano and if there was, then the piano has been cleaned as well as possible and eaten-away felt pads have been replaced.
• No woodworm in the piano.
• Check the frames. They are often bad or already broken (mainly the brown ones)
• The hammers are well secured and have no freeplay and do not run too heavy.
• Regular and good depth.
• No cracks in soundboard and cast iron frame.
• The catchers are well adjusted.
• No ugly tones.
• Pedals work correctly without squeaking and creaking.
• Pinblock is all right.
• Tuning pins are in order and rotate as they should.
• The strings are good (not rusty) and there are no rattling strings.
• Piano is tuned to a'= 440 Hz.