I have a Yamaha P-155 piano for about 8 years now.
I played very actively for the first three years. Unfortunately, later I practically stopped playing. In the meantime, there were problems with sticky / slow keys. The key always returns to its place but does so slowly. in addition, if I press the keys at an angle, pressing is even more difficult.
I opened my piano. it turned out that no key is broken,
Finally, I decided to perform a complete cleaning and lubricant / grease changestep 1
- disassembly and cleaning of all keys
The keys are very easy to disassemble. In order to remove the black key, you must first remove the two adjacent white keys. There are a lot of videos on youtube on how to do this. But I decided to remove them all and clean them:
I washed all the keys first, It's not that easy because the grease is very thick. and is in a hard-to-reach place on each key.
first I washed all the keys in warm water with a little soap. and then with water under pressure, I washed away the remains of the old grease. now they are all clean;)
It turned out that there was also a lot of dirt on the hammers, and even more was under them:
then I decided to clean and disassemble the entire mechanism.step 2
- remove all 88 springs to release the hammers.
The springs must be slightly bent, but be careful not to deform it
In the meantime, I ordered two dedicated lubricants.
luckily, they were available at one of the online stores for $ 40 each tube
AAX90710 G-1066Ystep 3
- take out and clean the hammers.
The keyboard mechanism must be unscrewed from the bottom housing first (all this is described in detail in the manual)
then you have to turn the entire keyboard upside down. Unfortunately, to take out the hammers. you have to remove the bottom stopper / smoother first. It is glued to the frame with double-sided tape (easy to remove) After all these years, the adhesive cannot be reused. so I definitely recommend that you simply replace it, which will have a positive effect on the lower volume of the mechanism.
it cost me around $ 24. (Still waiting for shipping) This Part is shipped with adhesive tape so replacement will be simple.
Finally I was able to take out the hammers
Here one important point The hammers are divided into four sections with different weight and in each section there are two types of hammers (white and black keys) so we have a total of 8 types of hammers. Fortunately they are marked with colors. below is a panoramic photo with all the hammers:
from the left:
1 section - green, red
2 section - black, purple
3 section - red, yellow
4 section - blue, no color
all the hammers have been removed!
I had to clean them all from dirt and grease, just like the keys. but I cleaned the hammers much fasterstep 4
- cleaning the frame
now it's time to clean your frame. some dirt can be simply vacuumed up. but the grease has to be wiped off. There are several elements on the frame where each key touches it: gray rubbers, and directly the frame
still trying to clean the frame of grease. and waiting for a new stopper.
and my piano looks like this now
: Let me know if I should update the topic when the stopper comes to me ?