Bx22 won’t move when warm

[Skylinevalley]

I have a box22 that everything works fine on,the backhoe and front loader works flawlessly but when the tractor gets warm it will no longer move just “gurgles”. The kubota shop told me it has good pressure and that the pop pins are stuck inside the case. They wanted 5400 to replace the cover and pop pins. But does anybody have any advice, it moves fine when it’s cold but when it gets warm it won’t move, all filters have been changed and strainer and fluid. Thanks everyone

 

[Skylinevalley]

Anybody got any ideas

 

[Henro]

First I have heard the term "Pop pins." Wonder what that refers to?

If 5400 refers to dollars...seems like a lot to spend on a nearly 20 year old tractor. Especially if it is a repair, and not a brand new HST installation.

There are very knowledgeable members here. Hopefully they will contribute some answers.

 

[Skylinevalley]

First I have heard the term "Pop pins." Wonder what that refers to?

If 5400 refers to dollars...seems like a lot to spend on a nearly 20 year old tractor. Especially if it is a repair, and not a brand new HST installation.

There are very knowledgeable members here. Hopefully they will contribute some answers.

That’s what I was told they are called, one is behind a Allen key and the other is on the right side supposedly. The one on the front is a spring and ball bearing, and the other is a spring and a cap of some sort. They did want 5,400 to replace the cover and the pop pins as they referred to . It’s very high that’s why I was reaching for advise on here

 

[Dieseldonato]

Would need to see what they are talking about in some sort of breakdown. I'm assuming they arw talking about some sort of relief valve, or may be some sort of valves related to the hydrostatic motor/pump. It's hard to say yes or no when we don't really know what part your dealer is referring to.

 

[Skylinevalley]

Would need to see what they are talking about in some sort of breakdown. I'm assuming they arw talking about some sort of relief valve, or may be some sort of valves related to the hydrostatic motor/pump. It's hard to say yes or no when we don't really know what part your dealer is referring to.

It’s 120, 140 and 150 from what I’m told

 

[Skylinevalley]

It’s 120, 140 and 150 from what I’m told

 

[hagrid]

He means relief valves.

 

[Henro]

He means relief valves.

Seems strange that pressure relief valves would be inaccessible and also subject to erratic operation due to temperature change…just my impression though…

 

[ve9aa]

Are you in North America or the UK? ( I own a classic British car and it nearly sounds like a term I have heard over on the UK car forum)

Are we talking US Dollars, Yen, Pounds Sterling, Pesos or?

How old is your hydraulic fluid?

 

[Skylinevalley]

He means relief valves.

Well he mentioned the pressure relief valve but then mentioned these as pop pins so I dunno

 

[Skylinevalley]

Are you in North America or the UK? ( I own a classic British car and it nearly sounds like a term I have heard over on the UK car forum)

Are we talking US Dollars, Yen, Pounds Sterling, Pesos or?

How old is your hydraulic fluid?

Yes I’m in North American and that’s dollars

 

[Dieseldonato]

Doesn't make sense for a relief valve to bypass when hot and not when cold. When cold the fluid is "thicker" and has a tendency to pop the relief. Typically once warm the relief will settle back on its seat and stay there unless the pressure picks up above the relief setting. Maybe they are some sort of check valve and it's getting bypass from being worn?

 

[Henro]

Well he mentioned the pressure relief valve but then mentioned these as pop pins so I dunno

lOL. I had to look back and see who the OP was! It was you! Unusual for people to refer to themselves in the 3rd person.

Edit: OK, I get it now…you meant the other guy…

 

[OrangeKrush]

I think I would definitely check into this more and get a second opinion from another dealer. Unless they have had problems with these on others how do they know.. guessing? If they do the job and that's not it you're out an awful lot of money.

 

[ehenry]

How many hours on the BX?

Did this happen all at once ?

 

[Skylinevalley]

The tractor has 1111 hours on it, it was doing it when I got it, I do know the old filter literally sucked itself shut on the inside and expanded the outside

 

[hagrid]

Oh my...

 

[Henro]

The tractor has 1111 hours on it, it was doing it when I got it, I do know the old filter literally sucked itself shut on the inside and expanded the outside

Thinking about this, your analysis does not make sense.

IF the filter actually housing expanded, suction internally would not cause this to happen.

I think, but do not know for sure, that filters usually have a flow path from the outside to the inside, and onward from the inside.

So, if the filter actually expanded on the outside, and collapsed on the inside, it must be due to high pressure on the outer side of the filter media, in the space between the filter media and the case.

IF so, what could cause this? If the filter is in the high pressure side of the hydraulic pump, and the filter media plugged up due never being changed, or due to something happening that put lots of contaminants in the fluid, maybe that would be the cause?

Just speculation here. Maybe someone who really knows something can offer some ideas...

 

[Skylinevalley]

Thinking about this, your analysis does not make sense.

IF the filter actually housing expanded, suction internally would not cause this to happen.

I think, but do not know for sure, that filters usually have a flow path from the outside to the inside, and onward from the inside.

So, if the filter actually expanded on the outside, and collapsed on the inside, it must be due to high pressure on the outer side of the filter media, in the space between the filter media and the case.

IF so, what could cause this? If the filter is in the high pressure side of the hydraulic pump, and the filter media plugged up due never being changed, or due to something happening that put lots of contaminants in the fluid, maybe that would be the cause?

Just speculation here. Maybe someone who really knows something can offer some ideas...

Yea I’m not sure honestly that ls just what kubota told me. I used it yesterday and everything worked fine(bucket/backhoe) the hydrostatic trans is a lil weak at temp makes a whining noise, it is very weak on a hill