Go Bottom Go Bottom

Belarus Tractor torgue for head bolts

View my Photos
bushhog
Join Date: Oct 2008
Posts: 8 ky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-07          160860

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.


Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
auerbach
Join Date: Sep 2007
Posts: 2168 West of Toronto
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2009-03-07          160862

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. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
cutter
Join Date: Feb 2000
Posts: 1307 The South Shore of Lake Ontario, New York
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2009-03-07          160866

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

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
bushhog
Join Date: Oct 2008
Posts: 8 ky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-07          160870


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. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
cutter
Join Date: Feb 2000
Posts: 1307 The South Shore of Lake Ontario, New York
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2009-03-07          160871

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. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
bushhog
Join Date: Oct 2008
Posts: 8 ky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-07          160872


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

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
cutter
Join Date: Feb 2000
Posts: 1307 The South Shore of Lake Ontario, New York
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2009-03-07          160875

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. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
auerbach
Join Date: Sep 2007
Posts: 2168 West of Toronto
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2009-03-07          160876

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. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
bushhog
Join Date: Oct 2008
Posts: 8 ky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-08          160907

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. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
cutter
Join Date: Feb 2000
Posts: 1307 The South Shore of Lake Ontario, New York
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2009-03-08          160908

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! ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
vladimirec
Join Date: Mar 2009
Posts: 29 Croatia
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-10          160937

Torque for head bolts: 20-22 kg on 0.5m -> 10-11kg/m-->
100-110 Nm. These values are from service manual.
You should also adjust valve clearance,for cold engine it should be 0.3 mm both inlet ad outlet valve.

to all:
What gearboxes you have on yours 250's? one handle or two? ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
auerbach
Join Date: Sep 2007
Posts: 2168 West of Toronto
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2009-03-10          160943

Depending on your readout, 21 kgm = 152 ft-lbs = 210 Nm.

Yes, it's flat side to opposite. A #8 11-mm wants 50-60 ft-lbs. A 16-mm gets 125-225 ft-lbs, depending on grade (no grade-stamp implies a low grade). A 22-mm gets 250-500 ft-lbs unless it's a head bolt, in which case follow the specification. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
vladimirec
Join Date: Mar 2009
Posts: 29 Croatia
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-11          160995

quotation from manual 'zategnite ravnomjerno snagom 20-22kgs na rukavcu od 0.5m' --> tight evenly with force of 20-22 kgs on arm/wrist of 0.5m. Try to find better translation, maybe I'm wrong.

M=F*l M=20*0.5=10 kgm

The torque isn't greater because there is no head gasket,head comes directly on cylinder. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
vladimirec
Join Date: Mar 2009
Posts: 29 Croatia
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-12          161018

You have entire t-25(belarus 250) catalogue of parts on:
http://www.autosoft.ru/online/acat/?idmodel=229&idmark=28&atype=3 ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
bushhog
Join Date: Oct 2008
Posts: 8 ky
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-13          161031

Thankyou Vladimirec, I went to the website you mentioned but it is in Croatian. I have a parts manual but the torques are not there.On my next days off I am going to start taking some parts off to try to determine what is the problem. Thanks all.
....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
auerbach
Join Date: Sep 2007
Posts: 2168 West of Toronto
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2009-03-13          161047

Vlad, if you would like a pen-pal, a Canadian electrical engineering student, give me your email address. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo



Belarus Tractor torgue for head bolts

View my Photos
vladimirec
Join Date: Mar 2009
Posts: 29 Croatia
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2009-03-17          161176

Thanks for offer.mmcorsair8@gmail.com, but i'm not promissing nothing. ....

Reply to | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo


  Go Top Go Top

Share This
Share This







Member Login