2nd Gen Non-Engine/Transmission starter contacts!!

[shendren]

well, i am finished changing out the starter contacts. WOW!! one of the contacts was almost burned all of the way thru.....



i recommend you change yours out if you are approaching 100k.



why only one of the contacts worn so far?



funny that the replacement contacts were not thicker but had a larger footprint than the originals. has anyone else noticed this?



thanks.

scott.

 

[LarryB]

Scott

That's because I sent you the SuperSize contacts. These are designed for 24 volt applications. These should last quite a bit longer than the stock replacements.



This picture shows a stock contact compared to our Super Size contacts.



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[LarryB]

Here is a picture of them installed but with the plunger removed.



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[shendren]

thanks Larry for the info. but why did just one wear so bad and the other hardly looked worn? thanks. scott

 

[LarryB]

Scott

Simply put, direct current (DC) travels in one direction causing one side of an arc to burn more. so the when the power travels from the first contact to the plunger the plunger may burn but over a larger area. As the plunger has a much larger contact area the burning is less noticable. When the power travels from the plunger to the second contact, the second contact gets burned.



At least this is how I understand it. Hope this helps.



Larry

 

[shendren]

so it's normal for one to burn more than the other? it's not just mine. thanks. scott.

 

[EMDDIESEL]

Why is it that a company as big as DC does'nt think of this but Larry B does?. It shows where the real brains are, The TDR

 

[Steve Roseman]

Originally posted by EMDDIESEL

Why is it that a company as big as DC does'nt think of this but Larry B does?. It shows where the real brains are, The TDR

Cost, bottom line cost. If they built the rest of the truck to last as long as the motor, they wouldn't sell very many new ones. Seems the contacts outlast the warranty period, that's all they worry about.