M9000 Overheating rear-end - NOT ENGINE

[bishop123]

I was advised to re-write my original post for clarity.

Hoping someone out there has had some experience with this and can offer advise -

We recently acquired a Kubota M9000DTC with a cab. It has run beautifully these past 6 months or so - until this past week when THE REAR-END overheated.

We had been bush hogging - about 10 acres - not overgrown, but pasture that had been grazed.

The rear-end / chunk became EXTREMELY hot - fumes from it - like hydraulic fuel burning came into the cab, smoking, etc. We thought it might actually catch fire. Smoke was "rolling" out of it. - The rear-end Diff. not anything attached to it (bush hog)

NOTHING AT ALL TO DO WITH THE ENGINE - which was not overheated at all.

We called the guy that had worked on some of our equipment in past - who is a recently retired Kubota mechanic, actually - and he said "some of them just do that and there is nothing you can do for it".

This just does not sound right ..... I certainly HOPE it is not right.

Has anyone had any experience with this?


THANK YOU

Bishop

 

[kevinj]

Does that model have an oil cooler?

 

[crmorse]

I have zero experience with this model so consider this a completely uninformed guess.... but any chance the brakes were dragging? My guess is it has wet-brakes like most larger units and if they were dragging a long time that could create a lot of heat....

Hopefully the braintrust will be along shortly to shed light.

 

[North Idaho Wolfman]

The hydraulic system on that model has three pumps and moves a ton of fluid quickly.
Any restrictions or contamination in the system will make the temp rise very quickly.
If the cases are dirty that inhibits the cooling ability of it, and with a cab unit any dirt / debris build up around and under the cab with also cause it to hold too much heat.

Was the fluid level checked when it was running hot?
low fluid =low ability to cool.

When was the last time you changed fluid and filters?
Contaminated fluid, dirty filters = heat build up.

What fluid are you using?
Lower quality of fluids increase friction = higher heat.

Have you checked the plugs and vents?
See below.
Hot hydraulic fluid smells really bad and any contaminates and moisture in it will cause it to steam/smoke.

Saying it's hot is one thing, having an IR heat gun reading is another thing, It would give us a much better understanding on the level of heat your dealing with.

If I remember correctly there were complaints on that model that the vent would get plugged and then the smell would go straight into the cab.

And saying you have an M9000 is like saying you have a chevy, give a little more specific information please.

 

[bishop123]

North Idaho Wolfman - THANK YOU VERY MUCH for so much info & things to look for!!!

It is a DTC - M9000DT-CAB.

I will print your suggestions and accompanying graphics and try to narrow it down.

AGAIN - THANK YOU!!!!

 

[russell.still.5]

If I didn’t know when the transmission was last serviced, that’s where I would start. Do a complete fluid change and filters. Keep the buckets so you could reuse the fluid if you did end up having to go inside the transmission.


Sent from my iPhone using Tapatalk

 

[D2Cat]

Before changing fluid it would be better to get everything clean, check vents, and reading with infrared thermometer. Then know what you're starting with and have measurable differences when you're finished changing fluids, if need be.

 

[russell.still.5]

Before changing fluid it would be better to get everything clean, check vents, and reading with infrared thermometer. Then know what you're starting with and have measurable differences when you're finished changing fluids, if need be.

If it got as hot as he thinks it did, couldn’t it have “burnt” the hydraulic fluid? He also said newly acquired. I always change all the fluids when I get something “new to me” unless there is solid evidence of when it was last changed.


Sent from my iPhone using Tapatalk

 

[007kubotaguy]

Hello
The first thing I would check is your Remote Hydraulic levers. Be sure one is not stuck in the on position. This will heat the oil up Real quick.
Good luck Lance