Starter, Heat to screws Generator

[Command52]

Im in the process of completely rebuilding my generator and starter . As usual the pole screw as they call then are stuck , Can I heat the pole shoes up to get the screws out without damages the shoes. I have new field coils so im not worried about them. Im pointing at them in the picture Thanks Billy

[Command52]

I have been spraying them for over a week

[staninlowerAL]

Impact screwdriver might work.

[Command52]

I tried my impact driver , Keep busting bits

[Don McCombs]

I have been spraying them for over a week

What are you spraying them with?

[muleboss]

Hammer and small punch. They will come out. Might bung up the slots a little , but they will loosen.

[John *.?-!.* cub owner]

I believe that on some starters those bars are held in place with a material similar to an early version of JB Weld. I am thinking heat is necessary as the bonding material is also in the bolt threads.

[Stanton]

I Googled "removing field coil screws on old generator" and got several hits. You might try copying and pasting that into Google and read about what others suggest. After getting search results, hit the Images button and there's all kinds of examples with drill presses, vises and specialty equipment.

Here's a reply on a collectors site for Ford autos:

"It's hard. You have three or four choices: (1) Take it to an automotive electric repair shop: they have a C-Clamp tool with a blade on the end of the auger that will turn it loose: (2) Use a punch and a 3 lb hammer, place punch in screw slot and hit with hammer in a counterclockwise direction: (3) secure the generator on a drill press, put the appropriate blade into the bit, lower the bit into the screw slot, and have a friend turn the bit with a pipe wrench: (4) use a hand impact drive with a decent bit and a heavy hammer. It's impossible to save the screws from damage: new screws are cheap. The screw itself has a concave shoulder that fits into a receiving recessed pocket: the threads on the screw thread through the tube and into receiving threads in the field shoes. When you replace the field screws, put them in VERY Tight. Good luck."

Another car site shows some pictures here: https://www.jalopyjournal.com/forum/threads/removing-coil-bolt-from-generator.1006698/

Think I'd do as Muleboss suggests and try the punch and hammer first, then move on to something else if necessary.

Let us know how ya do.

[SONNY]

Punch and hammer usually gets them, Try that first and if it don't do the job I would use a drill press and carefully drill them out. You will have to get new screws to put back in.

[tst]

heat works then impact driver, when installing new coils make sure they are well center, I use a exhaust pipe expander to make sure they are in place correctly

[Command52]

Could you explain how to center the coils Thanks billy

[tomstractor]

Heat the head of the screws with a torch till they glow , then let cool. They will come right out.

[tmays]

Heat the head of the screws with a torch till they glow , then let cool. They will come right out.

Got a friend who swears by this method. Key is to walk away and really let it cool

[SONNY]

The heat should sink all the way to the end for sure!
The coils have to be centered so they have even space around the armature . If not even , then the fields can't carry current evenly resulting in a non working starter. Thats why I don't mess with them. A shop here has all of the equipment to do the job and I watched them do one,---at that point I could see that left me out! -- They use jigs, fixtures, testers, etc. that we don't have.