[GreenKeys] Fwd: LMU 11 motor
Duncan Brown
duncanancy at earthlink.net
Sun Aug 14 11:59:17 EDT 2022
Finally got a chance to replace the starting capacitor in my LMU 11
motor. It works now!
Two observations:
1. As was previously suggested, the test for a bad starting capacitor,
of giving the motor a manual spin to get it started, does not
necessarily work with the larger. 1/12 HP motors.(may depend on the
condition of the capacitor?) I had used this method before to diagnose
a bad capacitor in a M28KSR, but it didn't work with this LMU 11. When
powered on, the motor just wiggled and would not run when given a manual
spin. But with a new capacitor, the LMU 11 runs fine now..
2. When I previously repaired the motor in the M28KSR, the only starting
capacitor I could find was about four times the size of the original one
and had to be outboarded. But thanks to Tom, N3CRK, this capacitor
https://www.ebay.com/itm/401963481930?hash=item5d96e3fb4a:g:7ycAAOSwGrBd0z2U
fits ! (almost). It was also cheap and came in 3 days.
The new capacitor is the same diameter as the old one, but about a 1/4"
taller. So I had to cut off ~ 1/4" of the plastic on the top and most of
the terminals to get it back in the box.
The old capacitor read the proper capacitance on a DVM-capacitance
meter. But doing a resistance check, it only went up to abut 5M Ohms and
then started falling.
Thanks to everyone who provided comments!
Duncan
K2OEQ
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