water pump location

Can anyone tell me where the water pump is located on an A? Mine does not have one as far as I can tell. Originaly a distilate tractor. C113 engine to the best of my knowleage. FAA 115150 serial num.

"Mine does not have one as far as I can tell."

You answered your own question. It is a thermo-syphon system.

Thank you for the reply!! I dont suppose you could explain the theory on that could you? i"ve never heard of that. I"m new to the tractor scene and am not familiar with the tech. of the "40"s as this tractor is more than twice my age!!

Its pretty simple, the top of the radiator is hotter than the bottom while the tractor is running, cuase the hot water/coolant naturally rises and the colder coolant "sinks" to the bottom. As the water/coolant cools off it goes through the engine and heats up, rising back to the top of the radiator, than slowly cools or loses heat and sinks to the bottom again. And the process just repeats as the tractor runs, with the air being pulled through the radiator helping to cool the water/coolant.

-Jordan

It relies on convection, and it's done without benefit of a pump or a thermostat.

The coolant is heated in the motor as it passes around the cylinder sleeves, causing it to rise, where it picks up even more heat from the cylinder, and rising all it can. It is allowed to flow out the top of the head to the radiator. As it cools in the radiator, it falls instead of rising. At the end of a long run, the top of the radiator will be too hot to hold your hand to, but you can lay your open palm across the bottom comfortably. It's that convection (coolant rising as it's heated in the motor, and falling as it cools in the radiator) that sets up the circulation.

You can add a pump if you want to. Hal

thanks everybody! if i were to run gas solely would it overheat? i.e. gas intake as opposed to distilate intake?

Nope, it won't care if you run it on gas. My SA (no pump or heat guage & it has been overhauled with Super C sleeves for a little more power) works just fine in the hot summer running an L-59 Woods in pretty heavy stuff. I always let mine run at about 1/3 open for 5 minutes or so after its been working hard, less gurgling when you shut it off. (My $0.02 worth. jal-SD)

No. In fact a lot of distillate tractors had shutters to close in front of the radizator, as the cooling system was so efficient that the cooler burning distillate couldn't heat the engine up sufficiently in cool weather, without obstructing the air flow over the radiator.

I'll add my explanation although the others were right, it is a little hard to understand.

The cool water in the radiator is heavier than the hot water in the engine. It is this difference in weight that causes the cool water to try to settle to the bottom and in the process flows in the pipe to the engine. This pushes hot water up and it floods the top of the radiator and fills the space left by the sinking cool water.

They are a great system, you don't need a thermostat because the water does not leave the engine until it gets warm. It is self regulating.

You may get a little boil over after a hard pull but it is nothing to be alarmed at.

You may have noticed the tractor does not have a fuel pump either, but it's predecessors in the 1930's did.

The letter series Farmalls (and other late thirties tractors) were designed by engineers with the same education as those who designed the B-17, P-51, Cord, Deusenburg, Cadillac V-16, etc. They look old and crude but are very well built.

The carburetor on the H and M, (and I think the A and B) have no mechanical accelerator pump. There is an air circuit that sends small bubbles into the main fuel jet, which is a tube. When you snap the throttle open the pressure around this tube suddenly drops and the air bubbles explode and force more fuel into the engine. The engines are very responsive to rapid load changes for this reason but have no accelerator pump leather to wear out or linkage to break.

Distillate tractors have hard valve seats (distillate was unleaded) so you never worry about running unleaded gas in them.

They're not very sophisticated old tractors.

he thermosiphon system was pretty common on the older hardware. Ford used it on the model T. The water pump did not show up in Fords until the model A in 1928.

Hey Guys Don't forget to tell him to look inside the fuel tank for used fuel guages (old sticks which fell in and remain inside the tank) Have fun! and Happy Holidays!!!