So good news, the motor is apart (but still attached to the impeller).First I decided to take the bolts off the back of the motor, then try to remove the rear plate and brushes. This is always tricky, especially when the motor is.... well gunked. I need to post some pictures, will do so at some point.
But anyway, best way to do it for me is to take a pair of flat bladed screwdrivers with fine blades and start tapping around the edge. Use lots of penetrating oil around the seam and try to get a blade between the seam and the cap. Preferably not at the weakest part which is where the holes in the cap are.
Also soak the top of the bearing with a lot of penetrating oil. It's press fitted in and if you lift too hard or without oil it can break the end of the shaft or make a general mess (or pull off the bearing which is.... well worse things happen).
Anyway once you start to split it work your way around the top, spraying penetrating oil in the crack. Eventually you will be all the way around, then start lifting from either side, then move 45 degrees, then lift, then move. Goal is to rock the cap off the bearing. Take time.
Top finally came off and the end of the motor is.... well a dirty mess. I'll be pulling that bearing at least. Then got the magnet tube/motor body off by lifting straight and gently, good news is all four magnets are attached. If one had dropped that's not a big deal, just note the magnet orientation, and glue it back with JB weld and a set of wood spacers to press against the wall nicely while it dries. I've written that up elsewhere.
I can also see there are four bolts, not two holding the motor to the blower housing. I'll get those other two another day. But I will re-assemble the motor so the stress of lifting the bottom plate is shared along the length of the motor. Will just take some time....
C On 5/13/2025 5:11 PM, Christopher Zach via Elec-trak wrote:
Thanks Tim! I think after looking at this that someone welded on a bolt there as some sort of a "cap" on the impeller. Unless they put the armature in a lathe, drilled a hole, and tapped it I don't see that connecting to the shaft.I noticed there are two holes in the impeller plate to get to the motor hold down bolts. I THINK one can remove those, then lever the motor back between the rear of the impeller housing and the motor end plate to get the impeller off. I'll give that a shot.Chris On 5/13/2025 3:31 PM, Tim Maxwell wrote:If you still need a picture for comparison, I can get one this weekend. I have attached the parts breakdown from the 40e manual, which shows the motor shaft having a keyway.Tim M On 5/12/2025 3:59 PM, Christopher Zach via Elec-trak wrote:Can someone snap a quick picture of their impeller so I can check? The unit now has penetrating oil in the set screw holes, and I'll work on it a bit more tomorrow. Should come off without that much effort, I don't recall if it had a keyway in it either (I would think one would rather it slip on the shaft than break the armature if it got jammed)C _______________________________________________ Elec-trak mailing list Elec-trak cosmos phy tufts edu https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak_______________________________________________ Elec-trak mailing list Elec-trak cosmos phy tufts edu https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak