stasrter brush plste

W

wbs

Senior Member
hello-background:starter is very weak-with wire from starter disconnected from starter lug and switch on car floor 'on', i get 6.43 v.
There is 6.44 v. at battery terminals ,so connection from battery to starter ok. When i measure ohms from starter lug to ground with wire from battery to starter lug disconnected,i get a few ohms, i think it should be mega ohms. so if there is almost a short circuit between lug and ground, do i need to replace starter terminal insulastor and inner insulator?
how to do it?:
do i need to remove whole starter or can i just remove the brush cap? when i replace brush cap , do i have to have some sort of a brush spring retractor when i put brush plate back on? thanks
 
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Are all the grounds clean? What gauge cable are you running from battery? What is the history on the starter? The post could be loose from the fields, your windings could be bad, the insulator on the brush plate is probably bad. Is the armature shaft straight? You would need to pull the brush up high enough so you can put the spring against the brush, it will hold it up and out of the way.
 
thanks for your help -one of my concerns with my measurements are they are made with the starter disconnected . i'm going to take the motor to the shop and if they find nothing wrong, then look for voltage drops across switch, cables, etc.while the motor is cranking.
 
Is it a reputable shop you are taking it too? Do they know Model T starter and generators? I have had many come to my place after they have gone to the best shop in town here and I end up redoing everything that they 'fixed' and then fix them right.
 
I agree that the local generalist who doesn't have experience with Model T generators is a poor choice. Personal experience here. You're better off to get the book and fix it yourself or send it to Andy, Ron Patterson, or Brent Mize.
 
thanks to Mr jelf and 'Oso. being inexperienced, i think that maybe a generalist would be less knowledgeable about out of spec issues but sould be able to deal with resistive-conductive issues and magnetic flux type issues which would be more universal to all starters. am i right? what kind of errors do you see that vgeneralists make that they should not try to repsir? thank you
 
One problem I encountered was that the guy didn't know where to get parts. When I got it back "fixed" from him it still had a broken insulator. I bought one from Lang's and replaced it myself. The guys I mentioned above could probably tell you other things that are peculiar to the Model T generator which some repair folks who haven't dealt with them wouldn't know.
 
This guy didn't reinsulate the field wires, packed grease in a bad bearing, didn't know how to set up the third brush, didn't know to cross the field wires on the generator, where should I quit. All for a slim price of $100.
 
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