Tractor transmission oil overheating. ( Valtra 6400)

[s o c]

Hi. Wondering if anyone on here has come across this problem.

I’ve recently had new hydraulic pump fitted to my Valtra  6400 (with  Botex roofmount crane)

Also fitted new pto shaft and flywheel pto hub.. ( old one had stripped its spines)

 filters and oil all new also.

Everything seems fine in normal operation  but when driving on road, hydraulic oil temperature warning light ones on after 10 miles.

First time it happened, I blewout oil cooler , second time I washed cooler ( carefully).

Valtra mechanic said oil level might have  been too high, I had filled to the Extra-Max line on dipstick. I drained some oil until at Max level on dipstick. Still happens after 10 miles.

I have tried removing pipes both sides of cooler to see what direction flow through cooler and what confuses me is that there is oil flowing from both sides.

Is there a valve or thermostat on the circuit thats  not working properly?

I would fit new oil cooler it I’m not sure it would solve problem.

Thanks

Edited 6 hours ago by s o c
Spelling

[AHPP]

52 minutes ago, s o c said:

there is oil flowing from both sides

 

Sure it's not just falling out of the pipe(s) with gravity? Because, yeah, that sounds wrong.

 

Unless there are two inputs and an output you haven't found yet?

Edited 5 hours ago by AHPP

[openspaceman]

2 hours ago, s o c said:

Hi. Wondering if anyone on here has come across this problem.

I’ve recently had new hydraulic pump fitted to my Valtra  6400 (with  Botex roofmount crane)

Also fitted new pto shaft and flywheel pto hub.. ( old one had stripped its spines)

 filters and oil all new also.

Everything seems fine in normal operation  but when driving on road, hydraulic oil temperature warning light ones on after 10 miles.

First time it happened, I blewout oil cooler , second time I washed cooler ( carefully).

Valtra mechanic said oil level might have  been too high, I had filled to the Extra-Max line on dipstick. I drained some oil until at Max level on dipstick. Still happens after 10 miles.

I have tried removing pipes both sides of cooler to see what direction flow through cooler and what confuses me is that there is oil flowing from both sides.

Is there a valve or thermostat on the circuit thats  not working properly?

I would fit new oil cooler it I’m not sure it would solve problem.

Thanks

Does the oil constantly flow through the Botex spool block while you are doing road work? 

[GarethM]

Valtra oil filter ?, had it once where a filter was fitted to a hydraulic power pack pump that was the smaller micron size.

 

Thinking cleaner must be better, for it to build up back pressure and turn filter into component parts.

 

Personally I'd start at a new filter just incase it's liberated the swarf following the rebuild, then cut the old one apart to see what's inside it.

[s o c]

1 hour ago, openspaceman said:

Does the oil constantly flow through the Botex spool block while you are doing road work? 

No.

spool kept off.

thanks.

[s o c]

1 hour ago, GarethM said:

Valtra oil filter ?, had it once where a filter was fitted to a hydraulic power pack pump that was the smaller micron size.

 

Thinking cleaner must be better, for it to build up back pressure and turn filter into component parts.

 

Personally I'd start at a new filter just incase it's liberated the swarf following the rebuild, then cut the old one apart to see what's inside it.

Thanks.

im thinking along similar lines.

filter is genuine.

was going to take out tomorrow and see, it’s like oil is bypassing and causing back pressure against the circuit .

[woody paul]

Is it getting hot? Could be censor faulty. 

[s o c]

3 hours ago, AHPP said:

24 minutes ago, woody paul said:

Is it getting hot? Could be censor faulty. 

Yes .

getting hot .

[GarethM]

Daft question, you've used the roof crane since all the work was done ?.

[s o c]

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

heating only happening when driving long runs on road.