Transmission Oil

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marshall
Posts: 42
Joined: Mon Sep 23, 2013 7:36 am
Zip Code: 01012
Tractors Owned: 1950 Farmall Cub

Transmission Oil

Postby marshall » Sat Jun 03, 2017 12:34 pm

I went to local Kubota dealer and the guy didn't have SAE 90. Instead I got SAE 80W-90. He said this is what everyone puts in the gears.

I just drained my transmission and out comes this opaque, tan colored stuff that is heavy viscosity. I'm looking at this new gear oil which
looks more like motor oil and am thinking this is lighter and am wondering if this is gonna be OK. Should I go ahead with it or should I be out looking for SAE 90 somewhere else?

staninlowerAL
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Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
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Location: AL (Southwest)

Re: Transmission Oil

Postby staninlowerAL » Sat Jun 03, 2017 12:41 pm

Sounds like your trans had some water infiltration. If it were my tractor, I would flush/wash it out with kerosene or diesel before refilling. Early model cubs used the gear oil, later models used HY-TRAN. Capacity 3 1/2 pints.

Jim Becker
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Re: Transmission Oil

Postby Jim Becker » Sat Jun 03, 2017 12:43 pm

80W90 is what you find today. You either use it or Hy-Tran equivalent. You old oil looks that way because it is contaminated with water.

I see Stan beat me to the same answer.

marshall
Posts: 42
Joined: Mon Sep 23, 2013 7:36 am
Zip Code: 01012
Tractors Owned: 1950 Farmall Cub

Re: Transmission Oil

Postby marshall » Sat Jun 03, 2017 1:05 pm

It's a 1950. If I were to wash out with kerosene before putting in the 80w-90 what's the method of doing the wash-out?
Do I replace the drain plug, dump in a pint or two of kerosene, wait awhile, and drain out?

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Glen
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Posts: 1972
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Transmission Oil

Postby Glen » Sat Jun 03, 2017 4:01 pm

Hi,
The guys on here say to put in kerosene up to the level plug on the left side of the transmission, put the plug in and drive the Cub for 5 minutes. Driving in 3rd gear would throw the kerosene around the most, washing the inside of the case some.
Then drain the kerosene out, and put in the oil.
The oil should not be thick, like the oil and water mixed together look. :)

staninlowerAL
5+ Years
5+ Years
Posts: 2773
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: Transmission Oil

Postby staninlowerAL » Sat Jun 03, 2017 4:15 pm

Glen wrote:...put in kerosene up to the level plug on the left side of the transmission, put the plug in and drive the Cub for 5 minutes...
Alternate cleaning, pull the shifter cover and use a garden sprayer to it down inside with kero/diesel while it drains out the bottom. Probably will need to replace the shift cover gasket. Take a look at this post about a week ago: viewtopic.php?f=1&t=96900&p=762999#p762999

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J3 Driver
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Tractors Owned: 1976 C-160 Wheelhorse
1995 JD F525
1998 JD 955 with 70A loader and 54 blade
JD 71 planter modified for use on Sleevehitch
Brinly plow, disk, and cultivator.
Son has a 1957 Cub

Re: Transmission Oil

Postby J3 Driver » Sat Jun 03, 2017 8:10 pm

Yep pull the cover. It's 8 bolts I think. Then you can look at the gears as well. Easy peasy.

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Glen
5+ Years
5+ Years
Posts: 1972
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Transmission Oil

Postby Glen » Sat Jun 03, 2017 8:19 pm

Hi,
Removing the shifter and cleaning in the forward part of the transmission, where the gears are, doesn't clean in the rear part of the case where the differential is.


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