42 Millitary Issue B

Here' a view of the rear end and pintle hook.  This is as good a scanned image as I can get from the manual. 

That PTO shield looks like one supplied by Monroe for use with their seat. 

The shield shown for the PTO in the above photo is factory. I have seen it on other 1940 B's.

I agree Ken, I've never seen a parts book with that PTO guard in it and I have a wide range of B parts books from real early to late. I've only found that guard on tractors with the Monroe easy seat along with the Monroe hydraulic lever mount.

I did notice that narrow seat and was thinking the plywood, or perhaps metal,  base must must reach the full width of the frame, or perhaps a couple shallow tool boxes one on each side? I'd like to get a more detailed look at that fire extinguisher also. 

Military PTO Guard. Terry Deans AC Data Book notes "In 1940 and after, a more substantial plate-steel PTO Guard with a warning transfer replaced the earlier sleeve-type guard without the transfer.

That pintle hitch on the horshoe drawbar seems woefully under engineered, IMHO.

I find it odd that the Radiator sectional view on page 37 of the T manual does not show shutters.

On the subject of not being able to identify a parts illustration or parts number for a specific part even though one may have "all" of the Parts manual for a "B" please bare in mind that the Design person(s) or Department responsible for the production of the manuals does not always list every single part or for that matter illustrate ever single part that is on a machine.  This would be particularly true for limited production machines that had slight variations, but were in fact , 99% the same as the standard production item.  Additionally, there are in existence "Allis Chalmers" factory books that list out the price of certain optional equipment for tractors and related equipment which there is no illustration ever provided.  The reference source of information is from the  Chief of Allis Chalmers Tractor Engineering circa 1930's - 1950's and is documented in print. 

Ken, good luck in your perserverance and study of the Allis Chalmers Miltary B.  Just wanted to provide some clarification and context to the discussion of the PTO guard. 

Forgot to mention. The Pintle hook looks similar to what we use today on our bucket trucks at work. Could've been made by Holland Mfg. Co. back then. I bet with some research, you could come up with a pretty close replica of it. I have an older Holland Pintle hook catalog I'll browse through at work. It shows the Industrial hooks that were available. That hook was probably specked out like the Power Co. spec's our hooks on the back of our trucks. The hook part itself looks very similar to the Holland PH125A with clam shell slide down lock.
Steve@B&B

Jim has a pintle hook from off of a Allis Snow Tractor. I don't know enough about pintle hooks to know if it is the correct one needed to clone his B.

    The only other Allis Tractor I have seen in full military dress was a D21 at the Arden NC GOTO.  I hope to see Jims B and that D21 side by side at a show one day.

IB was only in the beginning stages of production if I remember correctly. Prototypes were being made around that time.

A military IB would seem to be a better option as Rick stated, especially cosidering there are IB's with a large airport tug type front guard.

Edited by GBACBFan - 06 Feb 2010 at 6:10pm

Ken,
While I do not believe the M7 pintle hook would be correct I will probably use mine unless and until I find one that more correctly looks like the one in the TM.  The M7 pintle hook is identical to the IB pintle hook shown in the parts book.  Below is a copy of the id tag that was on my M7 hook that shows the AC part number to be 210629 (a match with the manual).

I'm going to make an assumption (for lack of any facts).  It is my guess that, assuming 96 tractors in 1940 is all the Model B's the Ordnance Dept. procured, they could have directed the pintle hook be one that was already being purchased for other vehicles.  The Army at that time did like to standardize, keep down the number of different part numbers, and have some interchangeablility of parts among different vehicles.  The reason they wouldn't have chosen the pintle hook used on the M7 snow tractor is because it didn't exist at that time.  The first M7's weren't delivered until 1944.

What would really be a boon to this discussion would be to find some actual dated photographs of this tractor in use, probably at some quartermaster depot or air corps flightline.  But until then we shall continue to opine.
Regards,
Jim

I will PM Jim for a M3 B progress report.

I can't see how it attaches, but that PTO guard looks a lot like the one on my 35 WC.