Same Question. What's My Model #? :D

jchriscloud

New User
Good Afternoon, Tractor Gurus!

I've inherited a kinda-sorta-vintage Ford Tractor along with the island that I am now managing in the Abacos Bahahahamas. It's a GREAT unit--runs perfectly....EXCEPT, I suspect a blown freeze plug. This is going to necessitate cracking the unit in half and, as such, I want to make as sure as possible that I have the necessary parts on island prior to performing such major surgery. Also, I am a FIRM believer in having the official Shop Manuals for as Much equipment as possible, so I'm also hoping to find that. But in order to do any of the above, I need to know without doubt what exactly IT IS.

I cannot for the life of me get this program to post photos. Arrgggghh.

Anyway, the info is as follows:

the vin plate says: Top line: C481474. Second line: K5011F, followed by 5J26B. Third line: 5G07C. Fourth line: 5H21B, then 5B26C. Fifth line blank. Then, in raised lettering on a plate on the starboard side of the block: D4NN 6015F, then stamped into the block below this, also starboard side is what I believe to be the VIN: K764329. Elsewhere on the tractor, there is, on the transmission (?): D3NN 7006C, 957E-4033A, and "N20 1 75 C5 NN 4024Y MH"
 
The model number is K5011F:
K50 at the beginning means that it is a 3550, which is the later industrial version of the 3 cylinder 3000 series. The 3550 was made from 1972-1975.
The first 1 means it has a diesel engine.
The second 1 means that it has no PTO.
The F at the end means it has the 4x4 torque converter power reversing transmission.

5J26B is the unit number, which means that it left the assembly line on September 26, 1975 during the day shift.

5G07C, 5H21B and 5B26C are codes for the assembly dates of various sub-assemblies of the tractor, like the engine, transmission and hydraulic pump.

C481474 is the serial number which is a 1975 serial number and agrees with the unit number above that it is a 1975 tractor.

D4NN6015F is the engine casting code, and from everything I can find on Google, that should be the 183 cubic inch 3 cylinder diesel engine (4.20 inch bore x 4.40 inch stroke), which is also what my references say that a 3550 should have come from the factory with.
 
Why would a bad freeze plug require the tractor to be split in half? The freeze plugs are all external on the block. You can see and get to them without removing much of anything. I would really hope that a freeze plug would not have popped out from freezing in the Bahamas. Do you have antifreeze in the oil?

It sounds like I should take a look at it, in person. I think we all should. Just send us all plane tickets, and we can come down there and help you get the tractor running and remove any unwanted adult beverages you have laying around. Thanks
 
John,
The 3 cylinder engines had soft plugs in the back of the block and head.
The ones in the head you can get at by removing the fuel tank and battery tray bracket.
But the ones in the back end of the block require a split to replace.
 
You are correct. I forgot about those. See, I would have remembered that after I got down to an island in the Bahamas.

:lol:
 

heh. heh. I hear that a lot! Actually, it's been done! I've had technicians from the areas of HVAC, Solar, Hydrogen, and outdoor furniture come to various Cays I've run over the years. ;)
 
Welcome to the forum! Which island are you on?
I think I saw one of those tractors mowing the airport in Freeport.
 

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