I just got my cylinders for my very old freeman 705 Loader rebuilt by the local tractor dealer. They sold me hydraulic fluid made for a new kubota to refill the system. It's extremely thin. I still have a drip even after this rebuild. I have to imagine its like putting synthetic oil in a old engine. The tolerances just are not tight enough. What weight old are people running on these older loader setups? I'm worried if I throw 85-90w in there it'll be too much strain for the pump? Does anyone have any suggestions what type of fluid i should be running? If it's 85-90w I'm good with that I just was looking for some advice on how to proceed. Thanks for any help you can offer.
- Thread starter nmorreale
- Start date
Wisconsin Cowman
Member
I image they sold you the Kubota UTD oil. Nothing wrong with running that I won?t use gear oil in a hydraulic system. I question the shape of the cylinders like the rods and head gland. Your going to have some oil
film because the rod needs a little lubrication.
film because the rod needs a little lubrication.
used red MN
Well-known Member
- Location
- Coon Rapids, MN
It?s more a question of what is the proper fluid for your tractor. Which looks to be a Massey 35 by an earlier post,
see link. If your tractor has a Multi-power you cannot use 85w90. The cylinder should not leak enough to drip it
may weep by a little to lube the seal but that should be it. I would ask the dealer who rebuilt it if there was some
scratches or groove that may be the reason it didn?t seal properly. Maybe these are packing type cylinders that
need to be tighten once they are stroked a few times. The dealer who rebuilt the cylinder should help you correct
the problem. Bottom line is I don?t feel that a hydraulic cylinder should leak if operated with hydraulic fluid.
Before hydraulic fluid as we know it today was made available many older hydraulic systems called for straight
10w oil which is not all that different in viscosity from modern hydraulic fluid. By the way welcome to YT!
Earlier post with more info
see link. If your tractor has a Multi-power you cannot use 85w90. The cylinder should not leak enough to drip it
may weep by a little to lube the seal but that should be it. I would ask the dealer who rebuilt it if there was some
scratches or groove that may be the reason it didn?t seal properly. Maybe these are packing type cylinders that
need to be tighten once they are stroked a few times. The dealer who rebuilt the cylinder should help you correct
the problem. Bottom line is I don?t feel that a hydraulic cylinder should leak if operated with hydraulic fluid.
Before hydraulic fluid as we know it today was made available many older hydraulic systems called for straight
10w oil which is not all that different in viscosity from modern hydraulic fluid. By the way welcome to YT!
Earlier post with more info
Janicholson
Well-known Member
I agree they should not leak more than a table spoon a week. If they had issues the rebuilder should have stated so. If they lift well and the tractor seems OK run it. Also there are chemistry and viscosity reasons not to use gear oil. If the cylinders are two way they should not leak mush at all. if they are lift only, they may eventually fill on the wrong side of the pistons and lock up part way up. Jim
Steve@Advance
Well-known Member
If you are running it off the belly pump, it needs heavier oil as that is also the lube for the transmission and differential. That requires 90 weight mineral oil or 15w40 engine oil.
If running it off an engine driven pump the lighter oil will be fine.
If running it off an engine driven pump the lighter oil will be fine.
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