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Here's some
hints:
You'll
probably have to soak them in WD-40 or Kroil Oil and then try again or use a
vice-grips on the head.....
The endshields are a rabbet fit to the frame - after
removing the screws, you may have to insert a screwdriver into the gap and
pound/pry apart.
When you pull the
armature out, be careful......the brushes spring down onto the
shaft.
They use wires
(or pins) inserted into the side of the brushholder (there's a small hole) to
keep the brushes up to slide it back in...I remember that was a little tough but
do-able. Just be careful when putting the brushes in as you have to hold
them all back to put it together....
- Blow out
the stator and armature with compressed air -- do it outside! Lots of carbon dust
!
Don't use solvents except on a dry
rag to wipe an area - never soak windings in
solvents.
- Take some non-metallic sandpaper
(Scotch-brite) and clean the commutator up
Clean out undercut/mica slots with a
small knife to remove carbon - if no undercut is left, you may need a service
shop to undercut it and turn the commutator.
- Replace the bearings with same kind - do not
spin them by hand! I'd put a little extra grease around them if space
permits.
- Brushes should
be rounded-in to the commutator for
good fit - use sandpaper if necessary
- Check windings
- look for burn marks, bad connections
- Check leads, stator windings - burn marks, etc....
re-insulate any damaged leads.
- Check and clean shunt field connection....armature
connection posts....
- Shoe-shine the shaft extension with some sandpaper to
clean up
Re-assemble, and turn by hand - should turn freely
and no brush clicking....
...Walt
-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu [mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of Kleinbrahm, Bob Sent: Monday, December 19, 2005 4:00 PM To: et Subject: (ET) E-20 drive motor. Hi,
I am in the process of rebuilding my E-20 tractor and have obtained bearings and brushes for the E-20 traction motor. I have the motor on my work bench and am about to disassemble the same, however I could use some advice on how to do so. This motor probably has never had a rebuild that I know of and the ends of it seem to be held together by 4 flat head screws. I tried to loosen these screws, but am leery of rounding out the flat head notch with too much force. Has anyone come up with a good solution for removing the ends of these motors?
Thanks,
Bob K
Bob Kleinbrahm Senior Network Engineer First Republic Bank San Francisco, CA. 94111 415 288-1478
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