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Author Topic: 8345 overheating  (Read 6434 times)

damengineer

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Re: 8345 overheating
« Reply #5 on: July 28, 2015, 07:24:11 AM »
When I said restrictor plate, I removed the guts from the thermostat and put the plate back in.   However, I have that big thermostat in this one, and I think there was anothe rpart in the lower end of the thermostat that should have been in there.   I have received another thermostat from Ebay member Harp2rs.  He asked what style head outlet I had and then sent me the proper one.  I have not had a chance to install the fan and the thermostat yet.  This tractor has A/C and I wonder if the A/c condenser coils in front restrict the air flow.  The electric fan does not come on until the A/C is turned on.   A/c is not working right now.  There appears to be a thermostat mounted on the radiator shroud.  This should be connected to turn the fan on when the air hits a certain temp.  I cannot see that this is working..

My New Holland tractor is back home & I am doing an in frame overhaul.  It sucked a valve.  Valve train was very loose.  Old retired Ford mechanic told me that this Ford engine had to have the valve train kept adjusted....  The weather here in central OK is at a 105-110 deg heat index.  I cannot get a lot done before I have to retreat to the house.   Can't work at night due to the mosquitos and biting flies.  This place is more miserable in summer than Louisiana.
  • MTZ 1220 w/ Kr-34 loader, Belarus 8345 w/ Koyker loader, Belarus 825 w/ Memo loader, White 2-105, Case 1270,
If your not leading the pack, the view is always the same!!

imperial1960

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Re: 8345 overheating
« Reply #4 on: June 15, 2015, 07:46:23 PM »
I would make sure anti freeze (silic drop out)  tests good and try a 10 day flush( something that attacks crud in the radiator) first this could bring temps down to normal.Draining antifreeze check color brown is bad
Belarus 562 4x4 russian loader bucket

imperial1960

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Re: 8345 overheating
« Reply #3 on: June 15, 2015, 07:32:09 PM »
Restrictor plate? this could be a plate with a hole to restrict water flow with no t-stat used! Overheat-when oil pressure drops checking these might help.If you have a heat gun shoot top radiator and the bottom radiator hose should be about 7-10 degree split higher split would be radiator is internally plugged.Check water pump pressure could be impeller slipping and slowing down water flow.Check radiator pressure cap also if head gasket fails yes you will get excessive pressure in radiator then it will blow water out the radiator cap.My 562 has a filter screen on the return side of the oil cooler not sure your model has this.
Belarus 562 4x4 russian loader bucket

Haymaker

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Re: 8345 overheating
« Reply #2 on: June 15, 2015, 11:26:06 AM »
Have you checked temp with an infrared thermometer while running the mower?   I've ran a 9ft disc mower/condtion with my old 825 and it makes it work but it cools fine.
What does this restrictor plate look like?  AS I've had my thermostat housing off and I never noticed any plate just the thermostat in there.   I have the oposite issue mine don't get warm in the winter months.  Well unless I really work it hard etc. 
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damengineer

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8345 overheating
« Reply #1 on: June 13, 2015, 12:19:56 PM »
My 8345 is overheating while pulling my  617 New Holland 9 ft disc mower.    Last year I replaced the top tank on the radiator and the cap.  I removed the radiator shutter and washed out all the coolers and condensers.   I disassembled the thermostat  and reinstalled the restrictor plate.   I have not had any problems with overheating.   When I started pulling the disc mower, in about 10 minutes the heat gauge started moving from 80c to 100c ZI thought perhaps the gauge was not correct, so I continued on and the gauge raised another 10 deg.   I replaced the fan belt with a wider belt to allow for worn pulleys and re tightened the belt after  running 30 minutes.  The overheating still occurred.  If I continued for another 10 minutes the oil pressure started to drop.  When I removed the radiator cap, I noticed the water flowing in the top of the tank and also a few bubbles.  I could not determine if this was from turbulence or exhaust leaking into the cooling system.   The tractor starts and runs great uses no oil and no water is in the oil.  When I can find my combustion leak tester,  I will check the coolant for traces of combustion....     

I have a 6 blade fan ordered, I also wonder about the restrictor plate.  There are 3 different thermostats that are listed, how do I tell which one is the correct one?
  • MTZ 1220 w/ Kr-34 loader, Belarus 8345 w/ Koyker loader, Belarus 825 w/ Memo loader, White 2-105, Case 1270,
If your not leading the pack, the view is always the same!!