Changing Hydro fluid question

[ttowne66]

Hello Guys

Going to change out the Hydro fluid from UDT to Amsoil ATH synthetic. Is it just as easy as draining the old, changing the filters and dumping in the new as the manual suggests, or is there anything more that I should know. Thanks.

Tom

 

[grandad]

It's a bit more complicated than changing the engine oil, but it's not that bad. Each model is a bit different but here are some general things to be aware of:

1. There are usually multiple drain plugs... be sure you get all of them.
2. There's usually a little metal screen that catches debris you need to locate and flush clear. Can be hard to locate or remove on some models.
3. The son of Godzilla works in the Kubota factory installing the HST oil filters. Be prepared for a major tug-of-war getting the factory ones loose at the first servicing. After that, piece of cake.
4. Be sure you have plenty of pans, buckets, etc.!

 

[ttowne66]

Grandad

Thanks. How do you get all the fluid out of loader? Do you need to allow for extra fluid when changing because of this extra fluid in the loader?

 

[midlf]

You don't need to worry about the hyd fluid in the lines and attachments. Compared to the amount in the trans the attachments are inconsequential.

 

[john_bud]

Ttowne,

There are plugs for the rear end as well as the trans housing. Pull them one at a time, before you pull the filter off. There is more than 5 gal of fluid in there so going 1 at a time gives you the least chance of overflow. If you raise the loader up all the way and extend the bucket before you start, you can then get more fluid out. After you drained the housings, then float the loader down and curl the bucket back (engine off). The weight of the loader will force out the fluid. It's like 1/2 to most of a gallon, is it worth it? You decide!

When you pull the filters off, again do them one at a time. When you replace the filters, you might want to partially fill them. Saves time the pump is dry and sucking air.

You should use this time to change fluid in the front axles if you have 4x4. It takes a LONG time to drain, and unless you have a special funnel or 1/2 moon pan that fits in the wheel, it is a bit messy too.

Putting fluid back in is the hardest part. The fill is close to the tractor and so you need a long funnel. They don't flow out that fast, so you are holding the 5 gal jug in one arm and steadying the funnel with the other and cussing under your breath every time the funnel overflows onto your shoes. A drill powered pump is a hot ticket to avoid that aggravation.

Once you do it, you will wonder why anybody would pay to have it done!

Don't forget to hit all the grease fittings, check air pressure and retorque the wheel nuts.


jb