A-C Model B Gatevalve

[Cardinal]

I have a 1939 Allis Chalmers Model B tractor.
It is a "hand crank" model.
There is a 90 degree gatevalve located in the intake manifold just above the Zenith carburetor.
My A-C operators manual says that the gatevalve may be opened tempoarily to let more air into the cylinders in order to aid clearing a flooded motor when hot.
I have been told that the gatevalve can also be used for tractor operation of a vacuum operated milking machine. The intake end of the gatevalve is a round stubby stem, very short for a hose connection.
I am inquiring to see if there is anyone who has ever actually used this tractor model to operate a milking machine off of motor vacuum.

 

[DickL]

Back in the late 1940's our C was used several times each winter to run the milking machine. It was not uncommon to lose power a coupla days at a time back then.

 

[Anonymous-0]

We used a C to run a Surge Milking Machine in the late 40s and early 50s when the power went out and also in tandem with a 1933 Chevrolet truck. Got the job done.

 

[Cardinal]

My thanks to Ralph and DickL for the replies.
If a "C" model Allis can operate a milking machine, I guess a "B" model could also.I milked 5 cows, morning and evening, two summers (1942-43) when I was 15 years old near Cerro Gordo, Illinois. Did that by hand. Never used a milking machine.
I am curious to know if the Model C had enough vacuum to milk several cows at once or could it milk only one cow at a time.
Cool Hand Don H.

 

[Dick L]

Dad had two milking units and I think he was only able to use one. I also think the units were slower.

I milked three cow thru High School by hand. Dad had sold the milk cows and took a factory job and Mom said she would not wash milking equipment again. I decided it would be easier to milk by hand with only a pail and strainer to wash morning and night which I would have had to wash on top of the milking machine anyway if I used that.

 

[Anonymous-0]

The B and C have the same engine. We simply ran a hose from the petcock on the manifold to one of the petcocks on the line on the stanchions and it would run one machine albeit a little slower. We also used our old Chevrolet farm truck hooked up the same way so we could run two machines. We had to let the third one rest. We were milking 28 to 35 depending on time of year.