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Transmission Lube on older tractors

D

David G

Well-known Member
I am finishing up with replacing the transmission and axle seals on my MH 44. I am wondering if it is OK to use a thicker lube aka 130 when refilling. All my tractors are kept inside a heated shop and only get worked hard in the summer.

I drained the lube out, and replaced it with 85W90, of the Farmall H last year when I replaced the transmission seals . They are fine now, but it is dripping out of every other place possible. I plan to replace those seals this winter.
 
David, I don't have the manual for your tractor, yet, many old tractors used 20 weight oil in the transmission. Today we use 80/90. I don't know if 130 weight gear oil would do good in cool weather, but should hold up enough in hot weather. Is there a reason you want to use such a heavy oil?
 
I want to minimize the potential for leaks. I am putting new seals in, but there is some wear on the axles. There were a bunch of new leaks that sprung up in the H after changing lube.

I am thinking about the 85W130
 
I think David is thihking that the heavy oil will not leak-wrong!unless you are pulling the snot out of it for hours on end in 100+degree heat,use the thinner oil.In fact,too heavy oil may harm things because it will not flow right.
 
I should have state that I replaced the front seals last year. It is leaking out of both axles, top cover and the PTO seal now. I plan to replace those this winter.
 
Try some Lucas Stop Leak to soften those 60 year old seals. What ever you do don't mention yellow metal friendly oil.....Ron
 
I use 85W-140 in all of my trasctors where the hydraulic oil is separate from the transmission lube. Mostly John Deere A, B, H, & D. Where the transmission oil douybles as hydraulic fluid, Allis B, I use universal hydraulic/transmission oil. No problems in 35 years, so I guess it's OK. Changing it every few yearss is a good idea, you will get some condensation.
 
Many highway vehicles use motor oil in the manual transmissions.
Motor oil is yellow metal friendly.
Find some Shell Rotella T1 50wt or 60 wt. Rates the same viscosity as 90wt gear lube.
 

As an old truck driver, I learned years ago that the Slipperiest thing that you can use on a 5th wheel (in the Winter) is STP...!!!
If you ever have had a problem with getting a tractor-trailor to turn (bend in the middle), you know how stiff Grease can be..!
I always use some STP with my transmission oil if it is the typical all geared arrangement..be it the Diff or the Transmission..
I figure it can't hurt and just may slow some oil seepage..
I agree that 140 Wt at anything under 10 Degrees is almost more of a grease consistency than an oil...
Ron..
 
them old tractors came out of factory with 140 gear oil.i remember our w-6 in -30 , had to let her run and warm up before could even shift it it gear.
 
I would go with what that tractor manuel recommended. Seals don't last for ever. I want that oil flying all over in side that tranny when it is running. Not the oils's fault seals get old and hard.
 
GL-1 is straight mineral oil, not Hypoid gear lube for differentials (like GL-5) which have no yellow metal. I use it in 90 or 140w. By the time you crank up and get going it has had time to circulate. Besides, old tractors have lots of "slop" in the dimensions that allow for a thicker grease. I use it, been farming 32 years.

Mark
 
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