P&W Arrow Hart Motor Starter

Hobby Shop · Nov 13, 2018

On start up, the motor was locking up on my Model C.
The contacts were terrible so I machined .008” off each one on the K&T 2D. I put the contacts back in, it started but was loud.

I should’ve went deeper from the beginning, the coils were bad. It took a few days to get the part numbers half sorted. I took a shot and ordered a 1964 part # that was close and it was a perfect match. A couple hours and $40 for some NOS coils and it should be good for another 60yrs.

Coil # 37674-502 is a replacement for coil #37640-502. The 2 at the end is for 220V and 501 is 110V.

Andy

johnoder · Nov 14, 2018

Atta Boy Andy

I like folks that just do it

Hobby Shop · Nov 14, 2018

Thanks John. :cheers:

The contacts needed a minor arc of 1-5/8”. The 2D had all 6 wrapped up in 30min.

TDegenhart · Nov 14, 2018

For the record, there was NOTHING wrong with the contacts. Extremely light useage. All you did was cosmetic and removed about 10 years of useable service from the contacts.

When will people learn.

Tom

Hobby Shop · Nov 14, 2018

TDegenhart said:
For the record, there was NOTHING wrong with the contacts. Extremely light useage. All you did was cosmetic and removed about 10 years of useable service from the contacts.

When will people learn.

Tom

Thanks, learn something new everyday.

Believe it or not. After I cleaned up the contacts, I started it 15x without the motor locking up. Before that, it sounded like trying to shift a manual trans without using the clutch...Everytime.

The humming from the starter was the only reason I went deeper into it..

Andy

thermite · Nov 14, 2018

Hobby Shop said:
Thanks, learn something new everyday. Believe it or not. After I cleaned up the contacts, I started it 15x without the motor locking up. Before that, it sounded like trying to shift a manual trans without using the clutch...Everytime.

The humming from the starter was the only reason I went deeper into it..

Andy

Umhh. I suspect you may have already twigged to it.. but no maker ever SHIPPED new contacts all grotty and cratered.

Might have been too much like work to f**k them up to simulate 40 to 60 years of hard use.

Or maybe they had just learned why it was a good idea not to bother?

Yah done good. No real point in ten years extra life when they are AGONY each go, is there?

It's like an Uncle. Marine Engineer. Single, good looking, good income, traveled the world in the narrowing selection of the engineering spaces of "steam up-and-down" and the counterpart on a broadening range of broads.

His Doc told him if he would give up smoking, drinking and hooring, he would live ten years longer.

His response? "No I won't. It will just SEEM like it! And why would I WANT to?"

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