Box to frame U Bolts

[Bob Carriere]

Are we sure they used U bolts?

All the CMP I have seen had long bolts going through thick plates to both the bottom of the frame and on top under the box???

If U bolts are used they would need to be installed up side down...U pointing up... and a 1/4 inch on top. They will not fit otherwise in the right space un de the frame. Very critical dimensions on the length of the U bolt as the top threaded end must fit the exact thickness of the frame plus the wooden spacer und the box and still have enough length to instal the top plate, lock washer and long U bolt nuts....if the U bolt is too long, once the boxes sits on the frame you will not be able to fit the nut.......

I have fabricated long bolts with plates at both end as that is the only way I have seen them installed......... Could it be that all the trucks I have seen had the boxes removed and reinstalled with bolts and plates sometimes in their career??

I have seen wooden blocks to stiffen the frames..... made of thick hard wood and groved on the inside portion to allow the inside bolt to hold it in place.......

Comments!!!

[Hanno Spoelstra]

Box is a 2C1 on my 1943 F15A Cab 13.

U-bolt at rear of chassis:

IMG_9424.jpg

Mid-chassis, this one has a spacer block:

IMG_9428.jpg

These are bad phone shots, I can make proper pics and take dimensions.

HTH,
Hanno

[Bob Carriere]

What are the dimensions of the bolts.....half inch or bigger and thickness of the plates??

Now for my next question...... where do we find spare parts listings for the cargo boxes???? All my manuals deal with the chassis, cab and mechanical components....... was there another manual for the box components????

Thanks

[Grant Bowker]

For those who may not know, I have Alex Blair's manual collection and the only reference to body construction is 1941 version reference in the post Hanno links to above.
I don't have material on the Lindsay construction for the house bodies or the for the later steel cargo bodies (and the machinery bodies made from them).
Also not known are the construction details for trailer bodies (except that some of them are very similar to the later steel bodies - may use some identical parts or sub-assemblies like tailgates).
I would be happy to hear from anyone with details mentioned.

[Robert Sexton]

I have a C15 with a Australian No 1 timber body.The bolts that hold the body to the chassis are as described by Bob Carriere. The cup head bolt passes through a plate with a square hole to lock the bolt from turning and spread the load across the body floor and then another plate under the chassis puts the pressure across the bottom of the chassis rail.My body has a chassis stiffener/spacer grooved to fit the bolt and sit snug inside the chassis rail.
All very interesting,
Robert

[Jordan Baker]

I took another read through my spare parts book and found the following.

[Jordan Baker]

And I checked one of my other references and answered this question.

Anyway, per the chart the correct diameter should be 5/8's and the threaded ends long enough for two nuts.