Gary,
Did you replace the front & rear bronze bushings? On mine the rotation
and weight of the armature had worn the rear bushing oval and the armature
had lowered. It had started rubbing on the lower field coil shoe and would
bind up as the torque of turning the engine kicked the armature out of true.
No cure except new bushings to hold the armature straight (I used the whole
rear part of a like-new TR-7 starter - lots of similiar starter components)
When you turn it by hand it does not 'kick over' like when loaded.
Also, it might be a shorted field coil. Pretty uncommon, but examine the
four field coils carefully for missing/decayed cloth insulation. It's tough
to see because the field coil is held tight against the case by the pole
shoe with cloth insulation squeezed in between. You can try tapping the
case vertically on the floor and look for telltale charred 'dust' from
burned insulation - or remove the shoes and check & reinsulate. A real
auto-electric shop may have a way to test 'em before you get in that deep.
Have fun!
Jeff
'74 CF13816U
----- Original Message -----
From: "Gary Fluke" <res0s0t7@verizon.net>
To: <6pack@autox.team.net>
Sent: Monday, June 09, 2003 1:29 PM
Subject: Re: brush nonsense
> Jeffrey,
>
> Thanks a lot for your thoughts. After reading your message I decided to
do
> what it would take to get good connections to the brushes and that all
came
> out fine. As you said, the solenoid worked fine when installed on the
> starter motor. The trouble is, when I tested the starter motor as it laid
> on the garage floor, it revved up OK for about 3 seconds and then slowed
> down to a steady but slow speed. That pretty well replicated what it does
> when in the car.
>
> The armature had scoring around it but the stator windings looked OK. Of
> course, one can't tell too much just by looking. It didn't feel as if the
> armature was binding when turning it by hand but when it runs it sounds
like
> there is a mechanical problem somewhere. Also, the brushes I took out of
it
> looked as if they had lots of wear left in them.
>
>
> Gary
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