Post by birkie on Apr 17, 2017 23:02:33 GMT
Hi all,
I acquired this CK-2-B16 a few years ago, and starting to get around to cleaning up and refurbishing it for daily use. I hadn't run it in a few years, but I fired it up for a few weeks to take some measurements and see how it ran. Well, it has a rattle which seems to be inside the compressor dome, as far as I can tell. Have a listen (you may need to turn sound up):
youtu.be/MfKIs6F7apA
The manual suggests that it could be bumpers rubbing against a stop sue to being out of level (I doubt this, tilting it various directions didn't do anything), or it could be the oil cup/trough has worked loose. The latter seems more likely, but I'm still not fully convinced. It says:
"If it is a 1934, 1935 or 1936 model, there is a possibility that the rattling noise may come from a loose oil cup. This cup catches the oil owing over the end of the cylinder and returns it to the space around the upper stator windings. It is held to the upper bearing bracket by two cap screws with lock washers under their heads. In 1937 and subsequent models, the oil cup is cast integral with the upper bearing bracket. A loose oil cup can be easily detected by shaking the machine. In addition to the deep toned thumping of the compressor bumper against the case brackets, there is a light jingling rattle.
"
There's a rattle, but definitely not jingling. Here's what happens if I just shake it when it's not running. It's hard to hear on the video; it's best near the end. The rattle appears as an "echo" a few seconds after each shake.
youtu.be/QudjIPzofYQ
I won't be able to actually *do* anything about it until I move it to our new place in Virginia, but I'm keen on getting a working hypothesis of what could be going on. Does anybody have any ideas or experience with this?
I acquired this CK-2-B16 a few years ago, and starting to get around to cleaning up and refurbishing it for daily use. I hadn't run it in a few years, but I fired it up for a few weeks to take some measurements and see how it ran. Well, it has a rattle which seems to be inside the compressor dome, as far as I can tell. Have a listen (you may need to turn sound up):
youtu.be/MfKIs6F7apA
The manual suggests that it could be bumpers rubbing against a stop sue to being out of level (I doubt this, tilting it various directions didn't do anything), or it could be the oil cup/trough has worked loose. The latter seems more likely, but I'm still not fully convinced. It says:
"If it is a 1934, 1935 or 1936 model, there is a possibility that the rattling noise may come from a loose oil cup. This cup catches the oil owing over the end of the cylinder and returns it to the space around the upper stator windings. It is held to the upper bearing bracket by two cap screws with lock washers under their heads. In 1937 and subsequent models, the oil cup is cast integral with the upper bearing bracket. A loose oil cup can be easily detected by shaking the machine. In addition to the deep toned thumping of the compressor bumper against the case brackets, there is a light jingling rattle.
"
There's a rattle, but definitely not jingling. Here's what happens if I just shake it when it's not running. It's hard to hear on the video; it's best near the end. The rattle appears as an "echo" a few seconds after each shake.
youtu.be/QudjIPzofYQ
I won't be able to actually *do* anything about it until I move it to our new place in Virginia, but I'm keen on getting a working hypothesis of what could be going on. Does anybody have any ideas or experience with this?
