Tractor-Operated LeTourneau Crane M20.

Hello Boely - I don't have much, but here is the sales specification sheet, and the line drawing, from the 1943 LeTourneau sales catalog.

The drawing should be to scale .. but unfortunately, there is no reference such as the scale, or a graph .. and the drawing is done on a three-quarter view basis, making it even more difficult to relate to precise measurements. I trust this helps you some. Regards, Ron.

Spec sheet .. http://img440.imageshack.us/img440/8712/letm201fj9.jpg

Line drawing .. http://img440.imageshack.us/img440/1167/letm202uo4.jpg

Have only some pics from 1937 but maybe help it anyway.

[img]http://img152.imageshack.us/img152/8676/letcw7.jpg[/img]

Thanks!!

This will certainly be of help,OzDozer and QuAD many thank for the reference,s as said they are of great help.

The line drawing and the picture from 1937 are great,the picture shows some great details!!

Again thank you both for your help.

Grtz!

Boely.

The crane in QuAD's picture is not an M20 .. but appears to be an early version of the AD-4. This unit was available with either steel wheels or rubber tires.
The steel wheel option appears to have disappeared by the early 1940's, probably due to the need for speedy movement from site to site. The steel wheels limited the crane to site use.

In 1940, the range consisted of the AD2, AD3, and AD4 .. but by 1943, with additional cranes built purely to Military specifications, the range consisted of models AD2, AD3, AD4, L20, B30, L41, M20, TC4, and L40.

[b]Boely
Ifn U still Lookn try these on for size
LeTourneau patents just a clik away
LOL

http://www.google.com/patents?id=UnVRAAAAEBAJ&dq=letourneau+crane

http://www.google.com/patents?id=JwtHAAAAEBAJ&pg=PA1&dq=letourneau+crane&source=gbs_selected_pages&cad=0_1#PPA2,M1

http://www.google.com/patents?id=SulHAAAAEBAJ&pg=PA1&dq=letourneau+crane&source=gbs_selected_pages&cad=0_1#PPA1,M1

cya
§wishy
HasBeen[/b]
Artist&PixelMaNipple8R

Swishy - All those patents are purely for the LeTourneau tractor unit cranes .. those fitted up with a permanent LeTourneau tractor unit .. not the towed crane design as in the M20. These towed tractor cranes were designed to be used behind dozers, utilising the tractor drawbar and the tractor CCU.
The ones with rubber tires could be lowered right down, and then roaded at speed behind any truck of sufficient size, thus making them extremely portable and very versatile. The lifting capacity of these style of cranes was nothing short of amazing, for the era.

Found a picture of one on rubber as used by AAF WWII
AJ

LeTourneau crane?