Belarus Diesel engine froze up

Dom C Thomas · Oct 18, 2009

I have a Belarus 420A, that I have been trying to get started.
It has been sitting for about 8 years.
I have had the oil pan off and everything inside looks good.
I have put SP Blaster to it for about 5 weeks, through the injector ports, and it still will not move.
I think that I might have another problem with it.
I have put it in 4 gear to move it back and forth, to try and loosen up the engine. Is it psssible that I might have a clutch sticking?

Anonymous-0 · Oct 18, 2009

I am assuming this tractor got rained on ...You MUST get all water out of cylindars,, no solvent can work thru water ...if you have direct drive with a clutch thru to PTO and You are desperate ,, You could hook a PTO shaft to a small idling tractor and dump the clutch ,, themotor will be spinning backwards from normal ,,Best method I ever Heard was to take a hydraulic line and Hook it too a spark plug hole.. probabvly the SAFEST and least likely to break something ...

phil25 · Oct 19, 2009

If this tractor has been sitting in the weather, there is a chance you have a cylinder or two filled with water, i have had water blow out of the exhaust manifold on mine after a good rain.
Maybe a good suggestion is to take the head off for cleaning the valves and removing any water and rust buildup from the cylinder walls.
So when it does become free, there is less chance of breaking the rings, trying to slide over the rough surface?
The PTO option could work if its a final option, but if the russian does not turn, something in the driving PTO line might let go or snap a gear tooth/cluth surface/shaft spline spline.
One thing to check is if there is a left tranny side PTO, and it is in neutral? If the rear PTO is in gear, you will increase the strain of the engine trying to turn,espically if the PTO is in the "ground speed" position and another option is that a PTO shifter is partially engaged, and locking the driveline?
hope it helps

Dom C Thomas · Oct 20, 2009

(quoted from post at 05:07:48 10/19/09) I am assuming this tractor got rained on ...You MUST get all water out of cylindars,, no solvent can work thru water ...if you have direct drive with a clutch thru to PTO and You are desperate ,, You could hook a PTO shaft to a small idling tractor and dump the clutch ,, themotor will be spinning backwards from normal ,,Best method I ever Heard was to take a hydraulic line and Hook it too a spark plug hole.. probabvly the SAFEST and least likely to break something ...

Thank you very much for the tip! We will be taking her apart this weekend and I will be keeping you posted in what I find! If I find any goldfich swimming around, at least I know what kind of a mess I will be in.

buckhornpaul · Dec 9, 2009

I had the same problem with the tractor I just
purchased. It was seized for about 3 years. what
I did was remove injectors, blow out the cylinders
with compressed air then used a 50/50 mix of
diesel and auto trans fluid. I let it sit for a
few days. while I was waiting I made a plate to
bolt in where the starter is, welded a short pilot
pipe on the plate, inserted a 15mm bolt into the
pipe, welded a starter gear on the bolt and used a
large bar to try turn over the motor. in a few
days I had it turning free. replace the injectors
and it started.. hope this helps. paul

buick8 · Dec 9, 2009

Last engine I tore down which was stuck, was a 6-cylinder Ford. One cylinder had the rings rusted to the cylinder wall; it was amazing how much force this could resist. I would have broken something if I had tried to force it to move. Most probably this is your problem: one cylinder. My Granddad along with 4 brothers was a mechanic for many years. He believed in soaking a stuck piston in Coca-Cola. Probably the phosphoric acid it contains will eat at the rust. Citric acid might be a good choice: Prestone radiator flush is citric acid. Personally, I would take the head off and look before I broke something; remember too that the word Diesel is not only a man's name, it is German for "expensive to fix" so don't break anything you don't have to.

Belarus Diesel engine froze up

Dom C Thomas

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Anonymous-0

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phil25

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Dom C Thomas

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buckhornpaul

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buick8

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