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Re: (ET) Trouble with my C-185
Thanks again.
I will report back on what I find.
Dennis
-----Original Message-----
From: Clean Power Supply [mailto:cleanpower att net]
Sent: Friday, May 03, 2013 10:39 AM
To: elec-trak cosmos phy tufts edu
Subject: Re: (ET) Trouble with my C-185
Larry has it pretty well laid out here.
Just to clarify: The black phenolic contactors were never used for
armature reversing. They are 1A and 2A functions.
Dennis,
Let's do an unscientific experiment. Turn master on, turn key on, sit on
seat, put toggle switch in forward, depress pedal. Smack each lower
contactor smartly with the handle of a screwdriver. If the motor runs you
have a faulty contactor.
BTW,
In your C-185 the 4 open devices on the upper control panel are called
relays, the 2 black phenolic devices on the lower control panel are 1A
contactor and 2A contactor. The one in the middle is the PTO contactor ,
the lower left 6-terminal steel is the F contactor and the lower right one
is the R contactor.
Let us know what you find.
Sincerely,
Harold Z.
On May 3, 2013 at 11:15am -0400, you wrote:
>My I-5 had a similar failure that was due to a bad Forward contactor,
>one of the 6-terminal types. Those devices depend on a spring (and
>gravity) to close the normally-closed contacts, whereas the
>normally-open contacts are closed by the rather hefty electromagnet
>coil. If the F contactor's normally-closed contacts are open, then
>you'll loose forward motion. The motor will *not* draw any current
>but will act as if one of its armature connections was missing (which
>it effectively is!).
>
>The older, double-stacked, contactors don't have that problem because
>both sets of contacts are actuated by electromagnetic action.
>
>Larry Chace, Ithaca, NY I-5 and E15
>
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>Elec-trak cosmos phy tufts edu
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