Shops, Barns, Varmints, and Trucks - Starter/Generator Soldering

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Starter/Generator Soldering

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Shops, Barns, Varmints, and Trucks
Forum Description: anything you want to talk about except politics
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=209447
Printed Date: 21 Dec 2025 at 9:17pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Starter/Generator Soldering

Posted By: wjohn
Subject: Starter/Generator Soldering
Date Posted: 21 Dec 2025 at 3:50pm

I was putting new solenoid contacts and brushes in the starter in my truck, and discovered halfway through that the brush leads are soldered to the windings (seems some are and some aren't on the Denso starts used in Cummins engines). I ordered a new starter for now and moved on... But I've always wanted to learn to do more on starters and generators seeing as we can't just go pick up a new on from our local auto parts store for our old tractors.

What is the tool of choice for something like this? I can tell it is going to take a lot of heat since the copper is pretty thick and is going to wick a lot of heat away... Big soldering iron? Torch?

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1939 B, 1940 B, 1941 WC, 1951 WD, 1952 CA, 1956 WD-45

Replies:

Posted By: steve(ill)
Date Posted: 21 Dec 2025 at 4:50pm

BIG old time solder iron.. Not a newer solder gun...

https://www.youtube.com/watch?v=-nMLhl2q4s8" rel="nofollow - https://www.youtube.com/watch?v=-nMLhl2q4s8

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Like them all, but love the "B"s.

Posted By: jaybmiller
Date Posted: 21 Dec 2025 at 5:11pm

I'd think they'd be 'silver soldered' NOT 'plumber's solder.

Just had the starter die on my '97 F150. The braided copper wire from the solenoid into the brushes corroded away. $150 replaced it but what a 'silly' idea having bare braided copper wire exposed to water,especially salty water.

Sad thing is IF I could find the part,it's a simple 10 minute repair.

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: Clay
Date Posted: 21 Dec 2025 at 6:33pm

I just rebuilt the starter for my 1983 F-250 6.9 idi diesel.

The brushes were worn out. Armature, bearings and windings were in good condition.

I used silver solder on the fields and braided copper wire.

Only cost me $15 for the parts as opposed to around $200 for a replacement starter.