Hey all, I have been busy for the past couple of weeks and my D50 has been dissected down to the armature while it was waiting for front and rear bearings and brushes to be installed.
Well, I installed the brushes and the bearings (the front bearing plate was replaced as a whole, since it wasn't much more in cost than just the new front bearing and I reasoned that it would be easier just to replace it as a unit). It was uneventful except for the part where I slid the front bearing/plate assembly onto the shaft. A small ring popped out of the front of the bearing plate. I managed to get it into the recess but every time I spun the armature, this ring wanted to rotate out of its recess.
I got to thinking that the fluted ring that goes right behind the fan (this is included with all replacement OEM Kirby Amodel fan kits) would have to sit in this recess, and the ring that came with the front hearing plate assembly was preventing it from going in, so I took it out. I figured that the ring was designed for metal fan assemblies but I could be wrong. I temporarily reassembled the fancase to the motor unit to make sure it ran. It did and sounded good, but it made a spooling sound as it spun up, almost like a turbo spooling up, which concerned me. After it was up to speed, and when it wound down, nothing sounded amiss. This was the case for low speed (nozzle) and high speed (hose).
At first I thought that the fan was not tight enough, since a loose fan could very well make a turbo spooling sound so I checked (it was tight already). I checked the commutator and brushes while it was running, there was minimal arcing (albeit a bit more evident on high speed). Since the fan and hub were tight, I am at a loss as to what the cause of the sound could be from. I will say that the armature did not rotate as fluid as my other Kirby machines once the new bearings were installed, but then again I'm guessing that it may take some time to break them in. I don't think it has anything to do with the brushes as I've replaced the brushes in my Avalir and Heritage II and haven't had a "turbo spool" sound (however, I did not replace the bearings in those machines as the bearings were still in good shape).
Any ideas as to what the "turbo spool" sound might be caused by?
Well, I installed the brushes and the bearings (the front bearing plate was replaced as a whole, since it wasn't much more in cost than just the new front bearing and I reasoned that it would be easier just to replace it as a unit). It was uneventful except for the part where I slid the front bearing/plate assembly onto the shaft. A small ring popped out of the front of the bearing plate. I managed to get it into the recess but every time I spun the armature, this ring wanted to rotate out of its recess.
I got to thinking that the fluted ring that goes right behind the fan (this is included with all replacement OEM Kirby Amodel fan kits) would have to sit in this recess, and the ring that came with the front hearing plate assembly was preventing it from going in, so I took it out. I figured that the ring was designed for metal fan assemblies but I could be wrong. I temporarily reassembled the fancase to the motor unit to make sure it ran. It did and sounded good, but it made a spooling sound as it spun up, almost like a turbo spooling up, which concerned me. After it was up to speed, and when it wound down, nothing sounded amiss. This was the case for low speed (nozzle) and high speed (hose).
At first I thought that the fan was not tight enough, since a loose fan could very well make a turbo spooling sound so I checked (it was tight already). I checked the commutator and brushes while it was running, there was minimal arcing (albeit a bit more evident on high speed). Since the fan and hub were tight, I am at a loss as to what the cause of the sound could be from. I will say that the armature did not rotate as fluid as my other Kirby machines once the new bearings were installed, but then again I'm guessing that it may take some time to break them in. I don't think it has anything to do with the brushes as I've replaced the brushes in my Avalir and Heritage II and haven't had a "turbo spool" sound (however, I did not replace the bearings in those machines as the bearings were still in good shape).
Any ideas as to what the "turbo spool" sound might be caused by?
