Tractor transmission oil overheating. ( Valtra 6400)

[openspaceman]

51 minutes ago, s o c said:

No.

spool kept off.

thanks.

Good. So it's either a restriction in the flow or could the brakes be adjusted a bit tight, assuming they are wet discs?

[GarethM]

27 minutes ago, s o c said:

Yes , done a lot of work with it since repairs.

heating only happening when driving long runs on road.

Fair enough, always worth asking 🙂.

 

You'd be surprised at the but the engine runs but you've not used it in anger to know if everything else works, but it shows the pumps working etc.

Edited Sunday at 13:28 by GarethM

[s o c]

20 minutes ago, openspaceman said:

Good. So it's either a restriction in the flow or could the brakes be adjusted a bit tight, assuming they are wet discs?

I don’t think they are and to be on the safe side I’ve eased back the adjustment a tad to see if it makes any difference.

[s o c]

44 minutes ago, s o c said:

 

Yes getting hot.

[s o c]

Hopefully, this may be the culprit.

cable either got pulled off or more likely, wasn’t connected properly after fitting pump.

will know for sure in a few days when driven home.

Thanks to everyone whe replied 👍👍👍

[Whoppa Choppa]

Interesting.. Had similar. Alarm goes off in cab at 70⁰c. 46 hydraulic oil isn't ideally supposed to get that hot.. 60-70 according to JD but still strikes me as awful hot. Blown out all rads, replaced tank return AND transmission filter. Now maxxing out at 60⁰c. There is a thermal valve aka thermostat which is supposed to get the oil up to temperature faster but it might have a check valve which will stick open with debris and bypass the oil cooler entirely - not good.

Edited 2 hours ago by Whoppa Choppa

[openspaceman]

2 hours ago, s o c said:

Hopefully, this may be the culprit.

cable either got pulled off or more likely, wasn’t connected properly after fitting pump.

will know for sure in a few days when driven home.

Thanks to everyone whe replied 👍👍👍

What does it do? Sense the pto shaft turning?

[openspaceman]

53 minutes ago, Whoppa Choppa said:

Interesting.. Had similar. Alarm goes off in cab at 70⁰c. 46 hydraulic oil isn't ideally supposed to get that hot.. 60-70 according to JD but still strikes me as awful hot. Blown out all rads, replaced tank return AND transmission filter. Now maxxing out at 60⁰c. There is a thermal valve aka thermostat which is supposed to get the oil up to temperature faster but it might have a check valve which will stick open with debris and bypass the oil cooler entirely - not good.

I agree hydraulic oil degrades with heat. I was unhappy if it got over blood temperature. Fancy thermostats something extra to go wrong. In cold weather I'd stall one of the services at tickover to warm it up and prevent cavitation. Cavitation kills aluminium gear pumps in short order.

[GarethM]

11 minutes ago, openspaceman said:

I agree hydraulic oil degrades with heat. I was unhappy if it got over blood temperature. Fancy thermostats something extra to go wrong. In cold weather I'd stall one of the services at tickover to warm it up and prevent cavitation. Cavitation kills aluminium gear pumps in short order.

Being a valtra think they all come with engine block heaters as standard.