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Hi all,
I've restored a JD-series E12 to "mostly running" condition. The last
thing I need to do is get the 3rd (A2) speed back. Speed control switch
tests ok with VOM. The A1/A2 solenoids/contactors are the
bakelite-looking short, stubby solenoids like you find in golf carts. They
sit horizontally on the control panel above the "normal" vertical F, PTO, and R
contactors. Those of you with the Home Owner's Service Manual can find a
diagram in the back of Chapter 7, with the E14,16,... Anyway, I replaced
the A1 contactor, as it was rattling like a machine gun when shifting into 2nd
speed. Now, the 2nd speed runs great, but I still can't get A2 to work for
the 3rd speed. I assume that the A2 contactor works properly, because
I can switch it with the A1, and get the same result. I'm also only
measuring 2+ volts across the big terminals on either contactor, when the manual
says I should find 4.
Other info--this version of the E12 has the PM drive motor with a
centrifugal switch, and the manual says the armature must be rotating fast
enough to close that switch. I think it must be, as it sounds fine, and
goes almost as fast as my E12s in the same range/speed. I also tried to
energize the A2 contactor by using the Power Pulse button with the armature
stopped to bypass the centrifugal switch, but no luck.
Any ideas?
Thanks,
Tom Pattee
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