water pump on my 45 A

Sat Mar 17, 2007 8:27 pm

OK I have a 1945 Farmall A. It has a steel shifter knob and it is S/N 143037. I was trying to figure out where the radiator was leaking and it was leaking at all places the water pump yes the water pump This looks to be a later engine. It also has the dip stick for the oil and also the pet cocks on the oil pan. What are the numbers I need to look for and where will they be to see what block I have? I think its a C-123 engine.
can anyone help me figure out what I have.

Sat Mar 17, 2007 9:32 pm

Look for the engine number, stamped onto a flat boss on the block, right side, to the front, very top edge, view obstructed by the governor control rod.

Date code, directly below the engine number, at the bottom edge of the block.

Check part number of the block, somewhere on the right side.

Is there a blank plate covering an opening for a hydraulic pump? It would be below the magneto.

Is it a power unit engine? Look for a cast-in starter cutout on the block in the same position as the Cub starter is mounted.

If it is late enough, it could have C-123 cast into one side or the other of the block.

Sat Mar 17, 2007 9:36 pm

Chad- The part number for the block is on the right side-sort of between the oil filter and the distributor(or mag)-that year "A" should have a block with a # something like 6342DX. If it's a newer block, a 6-digit+suffix, like 354895R92. A water pump can be added to an early engine,and I think power units used a dipstick. Hope this helps.

Sun Mar 18, 2007 7:17 am

ok I found my slip that I wrote on when I was down there.
behind the oil filter it looked to be 6342D
bottom front of engine was hard to read looked like 11.21.0
I will look that one over again it was very hard to read.
I will look for the part number on the top of the block.
thanks for the help so far.

my A also seems slower in each gear then my dads 1940 A is that possible of just my imagination?
the thing is running good with 7 year old gas or better lol I need new stuff.

Sun Mar 18, 2007 10:29 am

cjpenny89 wrote:my A also seems slower in each gear then my dads 1940 A is that possible of just my imagination?
the thing is running good with 7 year old gas or better lol I need new stuff.

Smaller tires or lower engine RPM would do that.

Sun Mar 18, 2007 12:06 pm

That is a correct A block part number. The date code is reasonable for your serial number. You will probably find that the engine number matches the serial number. The water pump and dip stick have been added by a PO.

Mon Mar 19, 2007 5:47 am

more numbers
head 6716-DB 11.6.0
block 6342-DH
S/N FAA 4307
the previous owner did rebuild it about 8-10 years ago and maybe he had it done then he has had it since it was only a few years old so I will have to call and ask him.
thanks for the help!

Mon Mar 19, 2007 10:11 pm

You might want to look closer at the engine number as it should match the tractor serial number. Sometimes the digits weren't struck that will. What you reported looks like it might be a partial of the tractor number.

Tue Mar 20, 2007 5:23 am

Ok jim I will look a little closer!

Tue Mar 20, 2007 1:54 pm

It's 11.6.O (oh, not zero). O is the date code for 1945.

Jim's probably hit the nail right on the head: Previous owner had the block machined for a dipstick, and added the water pump.

Wed Mar 21, 2007 11:28 am

thanks for the info on the block numbers. I do like that dip stick but I don't want to fix a leaky water pump.

Wed Mar 21, 2007 12:12 pm

Valu-Bilt catalog list water pumps by tractor model and casting number. I assume the casting number is the one on the water pump. The same water pump (listed) fits; A, Super A, C Super C, 100 - etc. 2 bolt. Price is $110.39

Suggest pricing the water pump at your local autoparts store and Case IH dealer.

Water pump replacement is not a major job.


Wed Mar 21, 2007 1:25 pm

I'd probably replace the pump with the standard elbow. It probably would also require replacing the head gasket.