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Farmall H transmission oil


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#1 IH-Harvester

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Posted 11 December 2009 - 10:53 AM

Last night I pulled the belt pulley shaft out of my H to replace the shaft oil seal. I noticed the gear oil in the case looked like chocolate syrup. I cleaned the case out real well and put everything back together. I was getting ready to add oil to the gearcase but wondered what oil to use? I got to thinking and wondered if the transmission circulates oil up to that housing? If it does,did moving the tractor just put more nasty gear oil up in the belt pulley gearcase? I need to drain the transmission oil also, I never have in the few months that I've owned the tractor. What Oil do I use in the transmission and belt pulley housing?

#2 HappyHank

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Posted 11 December 2009 - 11:06 AM

Years ago, when I had an H Farmall, I just used 80-90 gear oil in the transmission and rear end. Mine didn't have the pulley housing on it.

#3 randy hall

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Posted 11 December 2009 - 11:10 AM

i use 140 weight gear oil. it's thinner than the molasses that's in there now and it won't seep out past the seals as easy as 90 weight. remember everything in that old gearbox is sixty years old and has a little extra clearance worn into the moving parts.

#4 Samsdad

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Posted 11 December 2009 - 11:30 AM

Last night I pulled the belt pulley shaft out of my H to replace the shaft oil seal. I noticed the gear oil in the case looked like chocolate syrup. I cleaned the case out real well and put everything back together. I was getting ready to add oil to the gearcase but wondered what oil to use? I got to thinking and wondered if the transmission circulates oil up to that housing? If it does,did moving the tractor just put more nasty gear oil up in the belt pulley gearcase? I need to drain the transmission oil also, I never have in the few months that I've owned the tractor. What Oil do I use in the transmission and belt pulley housing?

I used 80W90. I don't have any leaks. The oil is circulated up to your belt pulley gear housing when your pulley is running. There's no drain plug for the belt pulley housing so you can suction the old oil out. My old old looked like road tar with plenty of sludge in the bottom of the transmission and rear end. Took awhile to scrape that old stuff out.

#5 Samsdad

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Posted 11 December 2009 - 11:30 AM

Last night I pulled the belt pulley shaft out of my H to replace the shaft oil seal. I noticed the gear oil in the case looked like chocolate syrup. I cleaned the case out real well and put everything back together. I was getting ready to add oil to the gearcase but wondered what oil to use? I got to thinking and wondered if the transmission circulates oil up to that housing? If it does,did moving the tractor just put more nasty gear oil up in the belt pulley gearcase? I need to drain the transmission oil also, I never have in the few months that I've owned the tractor. What Oil do I use in the transmission and belt pulley housing?

I used 80W90. I don't have any leaks. The oil is circulated up to your belt pulley gear housing when your pulley is running. There's no drain plug for the belt pulley housing so you can suction the old oil out. My old old looked like road tar with plenty of sludge in the bottom of the transmission and rear end. Took awhile to scrape that old stuff out.

#6 DC Snider

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Posted 11 December 2009 - 11:36 AM

Second on the 85W 140. I put 16 gallon in my M, nice and quite now. Not sure what the H holds, probably around 12 gallon or so. Yes the belt pulley is lubed from the transmission.

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#7 IH-Harvester

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Posted 11 December 2009 - 12:09 PM

Whats the best way to flush out the rear housing? Take the top rear end cover off? Is it ok to rinse it with diesel fuel to remove the sludge? I dont want to put new oil in it just to be mixed with the old sludge.

#8 F-N-HYMER

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Posted 11 December 2009 - 12:18 PM

WHEN CHANGE MY OIL IN REAR END I FILLED WITH DIESEL MOVE AROUND A LITTLE TO SLOSH IT AROUND THAN DRAINED AND FILLED WITH 80-90.

#9 FarmallFrank

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Posted 11 December 2009 - 12:26 PM

The "H" manual that I have shows, SAE-140 or SAE-160 oil for the Transmission, Differential, and the Steering Gear, that is in temperature's of 50* - 90* which would be pretty safe range to use from.

The capacity only shows 6 gallons.

I think I would just pour the diesel or kerosene into the rear end no real need to open it up, drive it around a little hitting the brakes from time to time to stop so it will sloush around in there then drain it may have to do it a couple of times to come out real nice.

Big thing does this tractor get stored inside at all, if not can you cover it in anyway, the H's and the M's platform is set up to collect and deposit rain water right into the differential, those little bolts that are recessed into the platform are the area's that I am talking about they hold/collect water and it eventually leaks into the rear end, look at how many there are, it doesn't take long to get much water into the rear end.

The "M" book only shows capacity of 13 gallons.

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#10 TxFarmallFan

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Posted 11 December 2009 - 01:23 PM

The "H" manual that I have shows, SAE-140 or SAE-160 oil for the Transmission, Differential, and the Steering Gear, that is in temperature's of 50* - 90* which would be pretty safe range to use from.

The capacity only shows 6 gallons.

I think I would just pour the diesel or kerosene into the rear end no real need to open it up, drive it around a little hitting the brakes from time to time to stop so it will sloush around in there then drain it may have to do it a couple of times to come out real nice.

Big thing does this tractor get stored inside at all, if not can you cover it in anyway, the H's and the M's platform is set up to collect and deposit rain water right into the differential, those little bolts that are recessed into the platform are the area's that I am talking about they hold/collect water and it eventually leaks into the rear end, look at how many there are, it doesn't take long to get much water into the rear end.

The "M" book only shows capacity of 13 gallons.


6 gallons on an H is right. I used 85w140, as others have said, and its quieted down considerably.





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