curious....

[leversole]

The way my frame doubles just under the cab, with the "second" frame on the outside of the frame the splays and runs forward, I must assume (you know what that means!) that a double frame is wider than a single frame, so my question is, was there a seperate trunnion stand (cast) for single and double frames? I understand all of the frame interior parts would be the same, but what about the things that mount on the outside?

[David]

Usually with a factory double frame, the second member is on the inside. It takes the place of the spacer plates at the trunion and the outside width stays the same as a single frame. Only difference is the length of the crossmembers.

[fifth wheel]

To answer your question the double framed B models use the same trunion stand as the single frame units because the second rail is on the inside and yes the crossmembers are shorter. On the triple frame B models the third rail is on the outside and the trunion stand is different from the single and double framed units, to allow for the wider frame. This should show up on the part number suffix (the P number P2, P3, etc.) On some L models they were available with 1/4 or 5/16 frames and the difference shows up in the trunion support and the radiator support because these are attached with reference to the outside of the frame.

I find this interesting and I would like to know more about the part numbering system, I think when there is a L.H. and R.H. part the lower number is the right side, and the P numbers have to do with dimensions and fitment.

FW

[rhasler]

I find this interesting and I would like to know more about the part numbering system, I think when there is a L.H. and R.H. part the lower number is the right side, and the P numbers have to do with dimensions and fitment.

FW

You are correct. Same way with M suffixes as a general rule.