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1970's Kubota tractor SAE 80? #4633718
01/13/18 03:38 PM
01/13/18 03:38 PM
Joined: Jan 2018
Posts: 6
Florida
Hatch Offline OP
Hatch  Offline OP
Joined: Jan 2018
Posts: 6
Florida
Hello all,
I am trying to figure out what's the best thing to replace my trans/hydraulic oil with on my 40+ year old kubota. Manual simply states SAE 80 and previous fluid looked like engine oil. I've been scratching my head at tractorbynet and someone mentioned bob so here I am.
There's basically 2 schools of thought - SAE80W-90, or tractor THF. What say you?

Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4633723
01/13/18 03:41 PM
01/13/18 03:41 PM
Joined: Nov 2013
Posts: 3,212
Kentucky
Ramblejam Offline
Ramblejam  Offline
Joined: Nov 2013
Posts: 3,212
Kentucky
What model Kubota?

Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4633729
01/13/18 03:48 PM
01/13/18 03:48 PM
Joined: Jan 2018
Posts: 6
Florida
Hatch Offline OP
Hatch  Offline OP
Joined: Jan 2018
Posts: 6
Florida
M4500DT
Diesel 6cyl gear driven

Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4633826
01/13/18 05:24 PM
01/13/18 05:24 PM
Joined: Oct 2014
Posts: 12,035
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,035
Idaho
I would call a dealer and see what they recommend.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4633863
01/13/18 06:25 PM
01/13/18 06:25 PM
Joined: Jan 2018
Posts: 6
Florida
Hatch Offline OP
Hatch  Offline OP
Joined: Jan 2018
Posts: 6
Florida
Dealers don't really deal with 40+ year old tractors

Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4633906
01/13/18 07:09 PM
01/13/18 07:09 PM
Joined: Nov 2013
Posts: 3,212
Kentucky
Ramblejam Offline
Ramblejam  Offline
Joined: Nov 2013
Posts: 3,212
Kentucky
Original fluid spec has been superseded, and THF (please get a quality product, not some low-priced garbage) is the updated recommendation for shared gear drive/hydraulic systems on M4500.

Two, five-gallon pails will get it done.

Re: 1970's Kubota tractor SAE 80? [Re: Ramblejam] #4633979
01/13/18 08:49 PM
01/13/18 08:49 PM
Joined: Jan 2018
Posts: 6
Florida
Hatch Offline OP
Hatch  Offline OP
Joined: Jan 2018
Posts: 6
Florida
So regular old tractor supply THF instead of 80w-90?

It sure is hard to find info on old M4500 tractors, is there a good source you're pulling from?

Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4633980
01/13/18 08:50 PM
01/13/18 08:50 PM
Joined: Sep 2008
Posts: 9,216
Ontario, Canada
IndyIan Offline
IndyIan  Offline
Joined: Sep 2008
Posts: 9,216
Ontario, Canada
Get one of the heavier THF and run it in the hydraulic system. Get some heavy gear oil for the front axle if its separate.


07 Focus ZXW, 5spd manual, 218km M1 5W30
18 Outback 2.5 CVT 15km 0W20
Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4634000
01/13/18 09:17 PM
01/13/18 09:17 PM
Joined: Nov 2013
Posts: 3,212
Kentucky
Ramblejam Offline
Ramblejam  Offline
Joined: Nov 2013
Posts: 3,212
Kentucky
Originally Posted By: Hatch
is there a good source you're pulling from?

If you're going to Tractor Supply, I'd get Rotella HD Tractor Fluid ($49.99/5gal).


Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4634064
01/13/18 10:47 PM
01/13/18 10:47 PM
Joined: Jan 2018
Posts: 6
Florida
Hatch Offline OP
Hatch  Offline OP
Joined: Jan 2018
Posts: 6
Florida
Awesome! Thanks ramblejam

Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4634434
01/14/18 11:05 AM
01/14/18 11:05 AM
Joined: Sep 2013
Posts: 10,534
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,534
Indiana
Originally Posted By: Hatch
M4500DT
Diesel 6cyl gear driven


Gear driven, but with a hydraulic system. (3 point hitch, loader, or belly mower)

Would this be 2 different fluids?

Hydrostatics on the other hand would be shared.


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

Re: 1970's Kubota tractor SAE 80? [Re: dlundblad] #4635059
01/14/18 08:38 PM
01/14/18 08:38 PM
Joined: Sep 2008
Posts: 9,216
Ontario, Canada
IndyIan Offline
IndyIan  Offline
Joined: Sep 2008
Posts: 9,216
Ontario, Canada
Originally Posted By: dlundblad
Originally Posted By: Hatch
M4500DT
Diesel 6cyl gear driven


Gear driven, but with a hydraulic system. (3 point hitch, loader, or belly mower)

Would this be 2 different fluids?

Hydrostatics on the other hand would be shared.

No, they all seem to use the same fluid for the trans and hydraulics, even the gear drive ones.


07 Focus ZXW, 5spd manual, 218km M1 5W30
18 Outback 2.5 CVT 15km 0W20
Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4635060
01/14/18 08:38 PM
01/14/18 08:38 PM
Joined: Jan 2018
Posts: 6
Florida
Hatch Offline OP
Hatch  Offline OP
Joined: Jan 2018
Posts: 6
Florida
Not sure what you're asking, but yes this is not hydrostatic, it's gear driven and apparently the transmission is lubricated by the shared hydraulic fluid.

Re: 1970's Kubota tractor SAE 80? [Re: IndyIan] #4635787
01/15/18 02:37 PM
01/15/18 02:37 PM
Joined: Sep 2013
Posts: 10,534
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,534
Indiana
Originally Posted By: IndyIan
Originally Posted By: dlundblad
Originally Posted By: Hatch
M4500DT
Diesel 6cyl gear driven


Gear driven, but with a hydraulic system. (3 point hitch, loader, or belly mower)

Would this be 2 different fluids?

Hydrostatics on the other hand would be shared.

No, they all seem to use the same fluid for the trans and hydraulics, even the gear drive ones.


I would check with the local dealer to be certain.

I was in there today asking about a used G series snowblower they had on the lot. I normally check out the selection of oil and they had quarts of Kubota 80w90 on the shelf. Granted, this could be for PTO boxes too.


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

Re: 1970's Kubota tractor SAE 80? [Re: Hatch] #4635791
01/15/18 02:38 PM
01/15/18 02:38 PM
Joined: Sep 2013
Posts: 10,534
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,534
Indiana
Originally Posted By: Hatch
Not sure what you're asking, but yes this is not hydrostatic, it's gear driven and apparently the transmission is lubricated by the shared hydraulic fluid.


I would confirm this with your dealer.

"Apparently" doesn't sound reassuring.


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

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