Belarus Tractor torgue for head bolts: Belarus  -- Other Tractor Brands Discussion Forum and Review Belarus Tractor torgue for head bolts: Belarus -- Other Tractor Brands Discussion Forum

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 03-07-2009, 13:04 Post: 160860
bushhog



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 Belarus Tractor torgue for head bolts

Hi guys; Let me prefice by saying I am a real novice mechanic and I'm working off suggestions from everywhere.I have a 1994 Belarus 250A, my problem is the fly wheel will only go halfway arround. I need to remove the head to see what is stopping the pistons or rods from moving completly up and down. I am told that the torque and order of loosening and tightening on all bolts is critical. My question is how do I find this torque and order information?This info is not in owners manual or parts catalog. Thanks for any info.






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 03-07-2009, 13:55 Post: 160862
auerbach



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 Belarus Tractor torgue for head bolts

It's similar to removing/installing a tire rim. No precautions are required to remove them, but to be kind to the metal, you could loosen each opposite pair by two hairs (sorry, only advanced mechanics understand "hair" metrics), and then undo them.

To install, start around the middle of the head and work outward, alternating ends, in at least three steps toward the final torque setting. It's only that number that you need to get, likely around 70-80 foot-pounds.

Unless you are careful and lucky, plan on replacing the gasket between the head and the block (after thoroughly cleaning and inspecting the two mating surfaces). If you're planning on keeping it a long while, consider getting new head bolts and checking their torque after 100 or so hours.






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 03-07-2009, 18:16 Post: 160866
cutter



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 Belarus Tractor torgue for head bolts

Are you convinced the problem is between the head and piston and not on the bottom end?






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 03-07-2009, 19:15 Post: 160870
bushhog



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 Belarus Tractor torgue for head bolts


Thanks auerbach.
Cutter; I am not sure the problem is not on the bottom end.I guess I have to start somewhere. Is there a way to decide if the problem is top or bottom? Thanks.






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 03-07-2009, 19:37 Post: 160871
cutter



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 Belarus Tractor torgue for head bolts

Isn't there a way to access the oil pan? You could pull that off and inspect from the bottom. Some diesels have an access plate on the side of the block, check for that as I am not familiar with that engine.






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 03-07-2009, 20:01 Post: 160872
bushhog



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 Belarus Tractor torgue for head bolts


Thankyou Cutter I will check it out. Do oilpan bolts have torque requirements? If not that maybe the easier first attempt.






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 03-07-2009, 21:58 Post: 160875
cutter



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 Belarus Tractor torgue for head bolts

Most every bolt on the thing probably has torque requirements and in fact most bolts have a limit before they stretch too far an/or break. Can't tell you what that might be, I go by feel on stuff like oil pans.






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 03-07-2009, 22:30 Post: 160876
auerbach



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 Belarus Tractor torgue for head bolts

Tell me the bolt size and what's stamped on the head and I'll give you the torque.

The size in millimeters can be the diameter at the threads or the hex width (the distance from one shoulder to the opposite one). A number on the head, likely a 7 or 11, indicates the metal grade.






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 03-08-2009, 19:17 Post: 160907
bushhog



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 Belarus Tractor torgue for head bolts

Hi auerbach,I have some measurements on bolt heads,I took it that shoulder to shoulder meant flat side to opposite flat side(corner to corner was 2-3mm more)oil pan bolt had #8 on head and 11mm wide.The remaining nuts and bolts had no #'s on top of them.Head 16mm threaded rod 10mm;Nut 16mm threaded rod 9mm;Nut 22mm;Nut 19mm; Some of these nuts had no threaded rod exposed. Thanks in advance.






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 03-08-2009, 19:26 Post: 160908
cutter



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 Belarus Tractor torgue for head bolts

If I were in your position, I would pull that pan and worry about the torque later. You may be making a repair from the bottom end or you may be pulling the thing apart. Either way, start tearing down and keep the bolts with each respective component.

Once you find the problem, then you can gather the information needed to stick it back together. I doubt you will have a problem doing that. Good luck!






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