Transmission oil - 80SAE

Transmission oil - 80SAE

Author
Discussion

Skyedriver

Original Poster:

17,880 posts

283 months

Friday 31st August 2007
quotequote all
Hi,
Now this may seem a bit thick from someone who has played around with cars for 30+ years but, the gearbox on the little tractor at work takes 80SAE gear oil. Is that the same as Hypoid 80? Also the manual says that the transmission oil and hydraulic oil (bucket on the front etc) are one and the same from the same resevoir/unit which sounds starnge to me.
Any comments?

pawsmcgraw

957 posts

259 months

Saturday 1st September 2007
quotequote all
the transmission and hydraulics on my tractor is all the same, about 25 litres in the rear diff housing/back end, which also has the power take off in the back and hydralic feed lines off the housing....same stuff in my opinion...and the manufactures.

Plank

147 posts

267 months

Sunday 2nd September 2007
quotequote all
No. Hypoid oil has additives for hypoid gears. Gear Oil comes in hypoid and non hypoid. The additive in hypoid oil will eat away at the brass in bearing cages and selector forks etc. So its important to find out which oil you need.

//j17

4,483 posts

224 months

Monday 3rd September 2007
quotequote all
Plank said:
No. Hypoid oil has additives for hypoid gears. Gear Oil comes in hypoid and non hypoid. The additive in hypoid oil will eat away at the brass in bearing cages and selector forks etc. So its important to find out which oil you need.
Not strictly true - GL-5 spec. EP oils have additives that attack phosphor-bronze components but GL-4 spec. oils don't.

Skyedriver said:
...the gearbox on the little tractor at work...
What is it? You can try the Penrite site (www.penrite.co.uk) if you know as they may have it in their (comprehensive) list. If they don't you can try phoning them and see what they recommend.

Skyedriver

Original Poster:

17,880 posts

283 months

Monday 3rd September 2007
quotequote all
Iseki, made god knows where.
the manual just states 80SAE gear oil
Since its been running empty for god knows how long I guess anything will be better that nowt but your continued views would be appreciated.

as a follow on I think we have just bought some EP80, now that could eat at the seals in the hydraulics?? or any brass bushes up there. Interestingly the reason it's empty is it leaks (from the hydraulics) possibly 'cos the wrong oil is in there now. That could also explain the crunchy change if the selectors are worn.


Edited by Skyedriver on Monday 3rd September 23:20

//j17

4,483 posts

224 months

Thursday 6th September 2007
quotequote all
If it shares gearbox oil with the hydraulics then EP80 should be OK (EP being Extrema Pressure - so the hydraulic pressure shouldn't break it down). To play it safe go for a GL-4 spec oil - normally cheaper than GL-5 too.

Skyedriver

Original Poster:

17,880 posts

283 months

Thursday 6th September 2007
quotequote all
Thanks, put some 4 in today, 500ml, still not reaching the dipstick!!!!!
Previous users found the best way to solve the prob was a big plastic sheet under the front, it was like the Torrey Canyon under there today.
Cleaned everything off and two hours late a pool about 6 inches across, dripping from the front (bucket) ram.
Guess the transmission is actually empty or a good as!!!!!
Ho hum!

//j17

4,483 posts

224 months

Friday 7th September 2007
quotequote all
Has it not occurred to anyone to replace the leaking seals?

Skyedriver

Original Poster:

17,880 posts

283 months

Friday 7th September 2007
quotequote all
No.

Plastic sheet underneath was obviously just as effective!!

Most of the gallon or so of oil on/between/under the folded sheet was clean except for the odd bit of tree so i suppose I could scrape it up and......

Apparently the comment was "oh it'll be all right"

The oil is actually running down the arm so the seal is well bu66ered unless there is another bit of tree/grit stuck there. Will try to run the ram up and down to see if it gets any worse...the stainless rod seems unmarked.

Not sure now whether to pour some more oil into the transmission or pour it straight onto the floor.

How easy is it to strip a ram and replace the seal, assuming it is available?

Regards
Tony H

Pigeon

18,535 posts

247 months

Wednesday 12th September 2007
quotequote all
Skyedriver said:
How easy is it to strip a ram and replace the seal, assuming it is available?
Doddle, you basically just unscrew the end. Keep it all scrupulously clean inside.

Skyedriver

Original Poster:

17,880 posts

283 months

Wednesday 12th September 2007
quotequote all
Sorry, sound like a thicky here but are seals fairly standard in size, if i took it out and measured it would an agricultural supplies type place be able to assist?
Never heard of Iseki before but there again not really done a lot on little tractors or big tractors come to that although the Volvo comes close.

Pigeon

18,535 posts

247 months

Thursday 13th September 2007
quotequote all
Agricultural machinery place or hydraulics specialist (not that uncommon) - take the old one along.