F15a steering knuckles

[Dave Schindel]

I am working on a 1940 F15a . I need someone to set me straight on the steering knuckles, can they be swapped from side to side? are they identical? I have no parts book so cannot check numbers.Can someone steer a knucklehead straight?

[rob love]

According to my later manual, yes and no. There was a part number that could do both, and there were part numbers that were particular about which side they were on. I am trying to find my early 41 manual to see what was more likely for yours.

[Jacques Reed]

Hi Dave,

From my later edition 1943 F15A-01 parts manual there were three types listed:

C11Q-3337 "used for replacing Steering knuckle CO1Q-3340 on R.H. side only" (it had 1/2" studs)

C11Q 3339 "Knuckle steering and cups assembly used with 1/2" studs" (no side specified)

CO1Q 3340 "Knuckle steering and cups assembly L.H. side only. Used with 7/16" type studs only"

Looks like C11Q 3339 is interchangeable L-R but perhaps another MLU member can shed some more light on it.

I do know of the two stud size differences as I have both types but not on same truck.

Hope this is of some help.

Cheers,

[Jacques Reed]

Further to previous post:

Attached is a photo of two steering knuckles with the two sizes of stud holes.

The one with the 7/16" dia stud holes is on the left side of the picture and they are noticeably smaller than the 1/2" dia ones on the knuckle on the right side of the picture.

Cheers,

[Private_collector]

Jacques,

I've taken screen shots of your two posts, hope you don't mind.
I have a feeling I may use that info at some point in the future.
Had no idea of any of that.

[Dave Schindel]

OK , beginning to look like the 1/2 in. threaded one goes on the right and 7/16 on the left. I have a 1/2 in. threaded one that came off the right side. I have 2 others I have not checked yet. I did not realize there was a difference in threads.