Hi Guys,
<>E-12 went dead again after going only 15 feet in the last
snowfall. Snowthrower still works but
no forward or reverse on the tractor.
This is what has been checked so far:
Both relays close when the key and seat switch are
closed
(Normal operating Condition NOC). Between the two contacts on top of
each, 1RTN had 41.0v and 2RTN had 40.9v. They both stayed closed in
both
Forward and Reverse.
Then checked between wires # 11 and #14 and got 39.7v in Forward.
Then checked between wires # 11 and #41 and got 39.7v in Reverse.
Then checked between wires #8 and #24 and got 39.7 in both Forward and
Reverse.
This tractor has had some uneven power in both Forward and Reverse
since I
bought it 2 years ago . That is, the power felt a bit uneven and the
power
needle would sway a little back and forth. It did stop dead another
time
when the insulation on one of the wires from the Varistor got stripped
accidentally (when I was reinstalling the speed control) and this wire
probably
touched something else. Have covered the badly insulated spot.
Tested between wires #8 and #7 and got 38.9v in
Forward and
38.7v in Reverse. Got similar results between #8 and #6. That
is 39.7 in Forward and 38.6 in Reverse.
Pulled up the cover over the battery charger and inspected the heavy
ribbon
resistors. They looked fine front and back and so did all the
connections. I remember that they heated up like a toaster back when I
had the Varistor problem but they look fine now.
Then checked the main connection posts on the motor and they seemed
fine.
<>Got 39.3v across the large connection posts in both in
Forward and Reverse and. Had this motor rebuilt with new bearings and
brushes less than a year ago. Would hope it is still good.
Rotated the motor by hand but no action. Found wire
#22 on the seat switch and wire# 62 on the Varistor assembly. There
are
38.6v between them in Forward.
As to current, there is some slight current usage
but nothing like when the
toaster was happening.
I am just guessing but could I have burned something out or have a bad
connection somewhere on the Varistor assembly, a diode or resistor or
something
like that???
Would appreciate any knowledge you can share,
Thanks,
Richard "Zack" Zachary
E12 model 26AE12CA serial # FP22038