MF 65

Phil Tibbetts · Jul 22, 2017

Going to look at a MF65 diesel next week. Owner says he was using it last fall but motor is stuck. I don't why it stuck, he didn't seem to know why. Tin looks good and he says tires are good. If the motor is stuck how much should it be worth. Are those motors relatively easy to find if it can't be rebuilt? I have no problem rebuilding it myself if it is rebuildable.

Phil Tibbetts · Jul 22, 2017

Also what is the difference in the 2 diesel engines? are the parts interchangeable to any degree?

ptfarmer · Jul 22, 2017

If it has the Perkins A4.203 that is a pretty common engine, if I remember right the pre 1960 65 used the Perkins A4.192, the A4.192 will have a little "pie" shaped piece between the oil pan, and the bell housing.

Phil Tibbetts · Jul 22, 2017

Guess I will have to wait until I put eyes on it. So will the 203 go into a 192 tractor?

Dieseltech · Jul 22, 2017

The first 65 diesels had the indirect injected A4.203, later models had the direct injected AD4.203. UK early models used the A4.192, 3.5 inch bore engine. I never saw that engine at the MF dealer I worked for, but there could be some US models with it..

Phil Tibbetts · Jul 22, 2017

Had me wondering, I had never heard of the 192 diesel engine in a 65 before.

Dieseltech · Jul 22, 2017

192 has 3.5 inch bore, 203 had 3.6 inch bore. Indirect engine has flat top pistons, direct has bowl type pistons..

ptfarmer · Jul 22, 2017

A friend of mine had a 1959 65 with the A4.192 that he sold for parts. The 4.203 should bolt right in, but not sure about the little things like the throttle linkage, or other little things.

The little "pie", or wedge piece between the oil pan, and the bell housing on the 65's with the a4.192 circled in red. The a4.203 won't have that, the a4.203 is like the a3.152 but with a extra cylinder .

DavidP, South Wales · Jul 23, 2017

Hi, in the UK at least the 65 with the 192 engine was referred to as
the Mark 1 and then the Mark 2 with the 203 engine. 192 engines gave
problems with the starting as they became worn hence the change.

DavidP, South Wales

Phil Tibbetts · Jul 23, 2017

Thanks to all for the info, I am hoping for the best but you never know with a 60 year old tractor.

Dieseltech · Jul 23, 2017

A4.203 had the oil pan wedge too. It went bye-bye on the AD4.203 engine.

Dieseltech · Jul 23, 2017

Don't know for sure but the larger 3.6 sleeve assemblies MIGHT replace the smaller 3.5 bore the 192 used. Main thing to remember is indirect and direct injected engines parts will not interchange far as pistons, head, injectors are different..

Phillip Tibbetts · Jul 23, 2017

I don't think I would bother with the engine if it was the 192, just find a 203. The thing is a lot of old tractors get parked for simple problems because the owner can't fix anything and the dealers would charge them a lot.

ptfarmer · Jul 23, 2017

Write down the serial number of the tractor when you go, and look at it.

Our Farmer · Jul 24, 2017

I have a 1958 Mk I with the 192. Rebuilt the engine when I got it, new sleeves, pistons etc, took a little digging to find the parts, but not really a problem. If I recall, a lit of WW II era jeeps use that same engine. Parts are available.

A few quirky things, the harmonic balancer is a little different size, so if you want to add a front pump you need to take one from a 203 to a machinist. The cold start fuel injector is a little different, again, I just built up the thread on a 203's with weld and had a machinist put the correct thread on it. The power steering pump is unobtanium. Mine's worn, I just use armstrong steering.

Mine starts and runs great. Very few problems. 99.9% of parts are available from Perkins.

Oh, and the steering drag linkage is also a bit different, but again, parts can be found.

MikeNL · Jul 24, 2017

Bought a 65 on the way home from work today. It had been hiding in the brambles waiting for a rear axle repair which never happened.
Have'nt had time examine it properly yet, but the motor looks like the 203 in my 155. There is no wedge on the block.
It has stood for a long time but was running when parked and the tin work is good. The rear axle is dismantled which made it cheap. In fact when I discovered the tank was full, it was actually almost free.

Serial number is CNDY 572720 - Can anyone tell me when it was made or anything else about it.

Dieseltech · Jul 24, 2017

1963, starts 572325 and ends 593027..

ptfarmer · Jul 25, 2017

It should have the 4.203 Perkins, if the injectors are in the head at a slight angle it is the direct injection engine (the indirect the injectors are vertical in the head). With the MF65 serial number prefix information I have, the CNDY prefix is interesting.

MikeNL · Jul 25, 2017

AD 203 motor. Has been stood for many years. There is a tin can over the exhaust, so it should be dry.
I can't turn the motor with the pulley belt, but I have disconnected the rear axle at the shear coupler.
Is there a way to apply force to the drive shaft without damaging anything and how much force should be required?

ptfarmer · Jul 25, 2017

You could remove the starter, take a pry bar with the end in one of the teeth in the flywheel to pry it over, and see if it will turn. It shouldn't take too much force with a pry bar, make sure the fuel shut off is off, and the transmission is not in gear. Something in the transmission could keep it from turning possibly.

MikeNL · Jul 28, 2017

Thanks for the tip. Turned quite easy, so I cranked it with a battery.- ok.

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