Carrier bearing mounting bolts, cotter pin bolts?

[71CHEVYSHORTBED402]

Just curious if the carrier bearing mounting bolts are supposed to be cotter pin bolts. I don't see a good reason for cotter pin bolts.

As I found them, there was a bolt and washer below, and a lock washer and nut on top. There were no cotter pins, though one bolt had what was left of one. Thank you

[randy500]

Fine thread too, right? They always have those but I have never seen cotter pins in the holes...

[Steeveedee]

Welcome back, Kotter! Couldn't help myself. Nope, no Cotter pins required in that application. Looks like someone went in and did a little dirty work at some point.

[71CHEVYSHORTBED402]

Originally Posted by randy500

Fine thread too, right? They always have those but I have never seen cotter pins in the holes...

Yep. The bolt threads are 7/16-20 x 1.1/8. The heads are small too. 5/8" head using a 11/16" OD nut.

Originally Posted by Steeveedee

Welcome back, Kotter! Couldn't help myself. Nope, no Cotter pins required in that application. Looks like someone went in and did a little dirty work at some point.

A great show. Especially Horsehack .......... Judging by Randy & your responses, sounds like it's a normal application, less the cotter pins. Yeah, someone busted a cotter pin in one, left it in there. I didn't even notice until I cleaned it.



Thanks for the responses.

[randy500]

Those are the right bolts and nuts. I guess maybe they had voter pin sin them from the factory, I just don't ever remember seeing them.
I lost one of those oddball nuts a couple weeks ago...I know the direction it went so I guess it will turn up.

[71CHEVYSHORTBED402]

Originally Posted by randy500

Those are the right bolts and nuts. I guess maybe they had voter pin sin them from the factory, I just don't ever remember seeing them.
I lost one of those oddball nuts a couple weeks ago...I know the direction it went so I guess it will turn up.

I imagine you're like me "I got to find that nut". I was thinking the bolt head was irregular, but I see you're right, it's the nut.

[D.PASSMORE]

Originally Posted by 71CHEVYSHORTBED402

Yep. The bolt threads are 7/16-20 x 1.1/8. The heads are small too. 5/8" head using a 11/16" OD nut.

That is correct for that size. I have the same bolts on my C30 carrier bearing

[mike16]

I dont think a cotter pin would be as effective as a lock washer in that application. I have had several of these trucks and never observed a hole in the bolt for a cotter pin used in that location. so dont read too much or over analyse the hole deal.