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I was throwing a large platter using the quarter trick. First one I throw the rip collapsed on me. So the clay went to the Bluebird 440 pugmill. After finishing the piece, I could not locate the quarter. I checked all over the wheel area. I knew I took out from the clay. That was yesterday.

Today, I suspected the quarter got inside the pugmill with the clay. There is a sight chance it jams up inside and damages. So I disassemble the pugmill. First I pour a cup of water and the run the pugmill to loosen the clay, then unhook a spring and a shaft inside the vaccum chamber, push in the shaft. Remove all screws and pull out the barrel. Once everything is exposed, I started to comb through the shafts looking for the quarter, and found the quarter on interior of the barrel. That was relief.

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I noticed the triangle thing needed to replace. This combined with the shaft in the air camber make it the de-airing process works. I do not know how though. If groove on this triangle thing becomes deeper, it stops de-airing. I need to replace it every five years or so. All I need is to unscrew two nuts and replace it with new one. After putting together the barrel in reverse way, I need to expose the fan, so I can manually turn the drive shaft to see the shaft in the air chamber is working correctly. In the past, I did not read the manual carefully, I turned on the motor and jammed the shaft and the triangle thing, and destroyed the shaft couplers and inserts, which connect the motor and the mixing shaft.

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Now, everything is working order again.

Pugmill and quarter
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