20-cwt trailer, or: Harry's build thread!

[Harry Moon]

I've got the GS box just working on the floor replacing the front 2 feet. Sat nose down with water in it so had to fabricate said floor, bottom corners of the sides and bottom of the front bulkhead. I'll go take some pictures now that I've got the hang of posting pics on here.

[Bob Carriere]

....would not mind seeing your progress on the box and some general before and after pictures. Wheels/rims will most likely be found in old junk yards associated with 1940 GM/Chev.... very narrow for 7:50 tires.... military may have been oversize to 8:25 .......

Certainly a very sturdy frame....overbuilt as anything else from that period.

One question puzzles me...... after thw war it was quite common to retro fit CMP with civilian double wheels which fitted the rear axle shaft and bearing...... I wonder if the same applies in reverse..... that a CMP brake plate, drum and 20 CMP wheel could fit on that same axle shaft...?

Any one knows out there...?

Bob

[Harry Moon]

IMG-20120615-00062.jpg
Inside detail of the left rear light.

IMG-20120615-00059.jpg
Replacing the front portion of the floor, I can't duplicate the ribbing so I went a gauge up to make up the rigidity.

IMG-20120615-00061.jpg
The left rear light placement, the wiring harness had 2 wires but I believe it is just the pencil light of later CMP's with the second wire for grounding.

IMG-20120615-00060.jpg
Front Bulkhead was out where I could take a picture all original except for the bottom 3 inches.

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The front hitch, surge mechanism and the reverse lockup with the slotted holder for storage.

Having done the breaks a CMP brake drum does fit on, Shoes and all parts from the brake cables, cylinders backing plates etc are all the same as on a 15CWT CMP.

[Harry Moon]

Having said that the CMP brake drum appears to fit, the shoes are the narrower ones from the font of the CMP's but the spindle matches the rear which has a wider set of brake shoes.
Correction the shoes were exactly the same as the REAR brake shoes.

[Harry Moon]

IMG-20120620-00076.jpg IMG-20120620-00077.jpg

It might be a plan to just put CMP drum and wheel on. The 15 CWT used a CMP 16 inch wheel. Does anybody know of a 20 CWT with CMP pattern wheels. Mines a very late war production and by the tag i suspect it was destined for China.

[Bob Carriere]

....from a wonderful week of R & R.

will study you photos and get back to you.

Thanks for the pictures.....

Bob

[Gunner]

Hi Harry:

I'm restoring a 1953 Yugoslavian copy of a 1942 Zis 3 76.2mm Russian cannon. It too has skinny 5 stud 20 inch rims on it. I just had the rims sand-blasted and painted so I'll post some photos and measurements. I'd be very interested in finding out what rims the Soviets copied- Ford, GM, ??

Mike

[Hanno Spoelstra]

Originally Posted by Harry Moon

Attachment 50025
It might be a plan to just put CMP drum and wheel on. The 15 CWT used a CMP 16 inch wheel. Does anybody know of a 20 CWT with CMP pattern wheels.

FYI, my 20-cwt GS composite body trailer has the same type of hub, spacer and 20-cwt wheels.

H.

[Harry Moon]

IMG-20120721-00141.jpg
Floor patched up, cleaned up and primed. Starting to go back together!

[maple_leaf_eh]

Originally Posted by Harry Moon

...
Attachment 49956
Replacing the front portion of the floor, I can't duplicate the ribbing so I went a gauge up to make up the rigidity.

Attachment 49957

Earlier this summer I posted a link to a forum with a fellow doing sheet metal work on old cars. He describes forming ribs with a female mould and a judiciously applied hammer on a male die. The same effect can be done with a roller swaging tool, but after doing 4 feet of rib on one panel, it doesn't have any other use.

[Harry Moon]

Red neck? I resemble that remark.
Compared to the condo's townhouses and all the old lots divided into 2 or 3 my place is a farm (With a lot of nice flowers) around here.

[Harry Moon]

Rob, thank you for the clean and sandblasted rim. Fits, looks the same from 5 feet but how many different rims could Ford make in those days? 3 rims all 3 are different but at least the one you gave me is not a widow maker as I see they are called.

[rob love]

Harry

Your welcome. But what was the difference with that one?

There certainly were a lot of variations. Of the 3 I tried to prep for you, all three were different as well. I guess that will happen when equipment sticks around for 70 years. I know we ran into that wiht replacement parts for many of the SMP vehicles, and especially for the modified "off the shelf" vehicles. As they entered their mid-teens in service, it was often hard to source replacement parts, and the manufacturers were not willing to make more for a small fleet of 2,000 or so. We often got parts in that required modifications to fit. Even the M38A1Cdns were getting some odd pieces towards the end

By the way, don't forget to thank Casey. He drove half way across the province to pick this up, and then had to sleep with it on the way back to BC.

[Hanno Spoelstra]

Originally Posted by Bob Carriere

very narrow for 7:50 tires.... military may have been oversize to 8:25 .......

Actually, 5" wide 20" diameter wheels fitted with 7.00-20 road tread tyres.
I found one supplier carrying this tyre size. Brand is Rintal, I think it is an agricultural implement tyre. No doubt there are other brands carrying this size, though it isn't very common.

H.