John Deere 717A hydro change

[DavidK]

I have a JD 717A zero turn, which uses 15W-40 engine oil for the hydraulics. Should the oil be warm or cool when changing the fluid and filter? Does it matter? Thanks

 

[oldcodger]

I would say warm for the same reason we believe in draining engine oil when it is warm. Flows better and drains more completely.

 

[Creekside]

I'd say warm because if it's like the 757 or 777 it takes forever to drain. I also recommend removing the tank and washing it out as a normal drain doesn't get all of the fluid out.

 

[DavidK]

I'd say warm because if it's like the 757 or 777 it takes forever to drain. I also recommend removing the tank and washing it out as a normal drain doesn't get all of the fluid out.

Thanks. What would be the best thing to flush out the tank with after removing it? I do have a half gallon of an older API rated oil that I wasn't going to use to refill with. That should be okay to use for a flush before refilling, don't you think?

 

[Creekside]

Thanks. What would be the best thing to flush out the tank with after removing it? I do have a half gallon of an older API rated oil that I wasn't going to use to refill with. That should be okay to use for a flush before refilling, don't you think?

That would probably be fine. I believe I used diesel when I did my 757 a few years ago.

 

[IndyIan]

I suspect everything is going to be pretty spotless in the whole system if its been running diesel oil, but I guess a flush wouldn't hurt. I would drain quite warm too, to drain as much as possible.