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oil (engine oil) in hydraulic system is in rear of the tractor. cap for pouring in and controlling oil level is right-up position on tractor body looking from the rear. You should pour oil in when hydraulic is in up position. otherwise oil will leak out if you fill it full. <br>
Transmission oil cap is on the front-right-down position of transmission housing. it should be filled to the cap. gearbox and differential are placed together. Use transmission oil. that's it.

Hydraulic Fluid 250AS
Belarus
Replies 3 Post by vladimirec

Try to ask your belarus parts dealer if you can buy gasoline engine that is used instead normal electrical starter. no preheat, no accumulator problems...just a little of gasoline mixture ;-) http://www.youtube.com/watch?v=5hISlTfXRzk <br>
That engine starters are originally factory built, it is not some crazy mechanic's idea.

Belarus 805 Cold Starting
Belarus
Replies 4 Post by vladimirec

take down the head ( only 6 screws). replace rubber seal on pushrod tube, in the same time you could take down cylinder and check piston rings. Pistons, rings, pushrod tubes, gaskets etc. are same on all belarus air cooled models: 400,420,250.

Belarus 420 Got an oil leak and seeing exaughst coming from cylinder
Belarus
Replies 4 Post by vladimirec

Use some machine on PTO shaft. If it turns under load it means that clutch is probably OK. The simplest problem with that symptoms: you haven't put the hi/low or forward/revers gear right. maybe clamp on shaft from clutch to transmission broke. there is square plate near hydraulic pump. take it down and you'll be able to check it there. You can adjust clutch on round plate under the ladder...

Belarus 250 tractor - starts but will not move
Belarus
Replies 18 Post by vladimirec

When You are starting the engine with decompressor, if fuel system is OK, You should see white diesel mist coming out of your exhaust. You could ask someone to pump that little pump on injection pump while you are starting it to make air bubbles in system go away(just for diagnose purpose not every time :) ).There is no need to get new copper o rings, you need to take sandpaper 600 or so and try to make the o ring surface even. when you are mounting them you should heat them with flame and then quickly tighten in place. Good luck!

250 not starting well
Belarus
Replies 7 Post by vladimirec

You could change shaft seal or better just put the grease in.To change seal shaft is pulled to the right. there are bolts on the right side.

250as question
Belarus
Replies 7 Post by vladimirec

Try if starter works.Take the battery and cables.Put the - on tractor,and put the + to the screw on starter where there is L shaped copper conductor( BUT for really SHORT time a second max) .If it spins the starter is fine.Check the starter relays.Battery - , normaly goes from acc, to main switch and trough switch to treactor metall panel. If that's fine the problem could be in relays,If the tractor is older in relays are basic electronical parts...Good luck!

Belarus 250AS Starter Short melts wires
Belarus
Replies 10 Post by vladimirec

About your gears: are you sure that you put it in the fast/slow or forward/reverse gear banks correctly,all the way to the left or right???how many work hours has it got?Maybe your gears are worn out or clutch is defective.I cant belive that mechanic's in USA dont know how to fix so simple tractor.I've been here on foum about a year and i cant belive what suggestions i have read many of them dont haven't got any logic.This tractor is constructed so that you can do engine overhaul in field,you can crank it up using screw driver etc...there in no elecronics,pure mechanic.I CAN'T BELIVE IT.Bye and good luck! ;)

1990 Belarus 250 Questions and Introduction
Belarus
Replies 7 Post by vladimirec

There is entire catalouge of tractor parts but it's in russian:

http://www.autosoft.ru/online/acat/?idmodel=229&idmark=28&atype=3

part numbers for 250as
Belarus
Replies 5 Post by vladimirec

Hello! If You can't find appropriate fuel filters,change entire filter casing with one of some car for which you can find filters.Oil filter is centrifuge so You just clean it every time You change engine oil.In case this tractor is new for you like You said,You should also check oil in high pressure pump,hidraulic fluid,oil in hidraulic pump mechanism,transmision oil level,oil in steering wheel housing.<br>
<br>
You can put on any 12V 400-500W car alternator. <br>
<br>
Enjoy the Little mean machine :) ;)

250as new and have questions
Belarus
Replies 5 Post by vladimirec

First of all this is an air cooled engine so there can't be a water leak... If You have some skills You could remove oil pan to inspect crankshaft,piston rod and oil pump.if all parts are fine remove the engine head to see if valves ain't broken.It's pretty simple two bolts on valve cover and 4 bolts on head.

Belarus 250AS engine problems
Belarus
Replies 9 Post by vladimirec

You should be able to find appropriate picture there:

http://www.agrofoto.pl/forum/index.php?app=gallery&module=cats&do=sc&cat=235

If You are interested to find pics, info's and other about this tractor search for: vladimirec,wladimirec and t-25

belarus 250 as fuel lines
Belarus
Replies 5 Post by vladimirec

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

Belarus Tractor torgue for head bolts
Belarus
Replies 17 Post by vladimirec

You have to remove head, after that it's simple. take out the tube and replace o-rings.

250 oil leak pushrod tubes
Belarus
Replies 2 Post by vladimirec

I see that is an old post but whatever it maybe halps to someone.Belarus electrical instalations are 12V.The thing about 2 batteries is that each of them is 6V and they are in serial==> 6+6=12V,nomaly.This combination is more durable,it gives higher currency and batteries live longer.If you have two 12 V batteries check connection.It is normal for voltage to drop under 12V when you turn on starter.Check all cables,starter bearings, brushes and batteries.Batteries should be >100Ah,should have enough electrolite and should be charged to full capacity because starter,particulary on that engine,drains a lot of current.

Belarus Tractor starter problems
Belarus
Replies 4 Post by vladimirec

As i see most of you mechanics didnt even see 250's engine.
It's quiet possible one of simplest diesel engines.About valve cover - it has two bolts with copper ring(gasket) under each bolt.If cover is removed carefuly,cover gasket will be reusable.The head has 4 bolts and no gasket.Only thing you can see by removing valve cover is if valves are stucked in open position.Best way to rotate the engine is by using a rod on the bolt in front of engine.the one that holds main pulley.It has even markings to determine motor position.

Belarus valve cover nut removal
Belarus
Replies 5 Post by vladimirec

Electrical engeneering, but we went off topic with this.

Belarus Brake Installation howto
Belarus
Replies 9 Post by vladimirec

the belarus 400(d-144engine) and belarus 250(d-120engine)have same engine segments(cilinder,piston,head,valves etc.)just that 400 has 4 of them and 250 2.

piston swap
Belarus
Replies 10 Post by vladimirec