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Discussion Forum

Belarus Diesel engine froze up

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Dom C Thomas

10-18-2009 18:38:59
75.121.121.180



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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?

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buick8

12-09-2009 06:12:15
146.130.105.162



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 Re: Belarus Diesel engine froze up in reply to Dom C Thomas, 10-18-2009 18:38:59  
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.

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buckhornpaul

12-09-2009 05:38:35
69.168.138.192



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 Re: Belarus Diesel engine froze up in reply to Dom C Thomas, 10-18-2009 18:38:59  
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

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Dom C Thomas

10-20-2009 17:44:39
75.121.121.180



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 Re: Belarus Diesel engine froze up in reply to Dom C Thomas, 10-18-2009 18:38:59  
[quote="J Heietkemper"](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 ...[/quote]

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.

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phil25

10-19-2009 08:42:37
24.222.70.213



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 Re: Belarus Diesel engine froze up in reply to Dom C Thomas, 10-18-2009 18:38:59  
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

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J Heietkemper

10-18-2009 20:07:48
98.115.36.202



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 Re: Belarus Diesel engine froze up in reply to Dom C Thomas, 10-18-2009 18:38:59  
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 ...

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