Sounds Expensive

[Tom_H]

I could tell that it was leaking out from somewhere under the seat....I checked her out and found no more leaks. I guess that the pressure relief valve did its job....

(2000 BX2200 with about 300 hr.) A month ago, I did a full day of ground engagement loader work with the toothbar. No problems. Sunday, I cranked up to remove loader and tiller, put on MMM. I did lift loader with tb with engine cold at low rpm, immediately after crankup so garage wouldn't fill with sooty exhaust. I noticed hydro fluid leaking from chassis. That line that plugs into loader when on, and back into tractor when off was wet with fluid (just had all quick connect hydro couplers replaced in Feb.). Then noticed constant stream of fluid racing along line from near rear of tractor and pouring to ground from beneath seat. As I moved tractor, it made several quite large puddles on garage floor. I am quite nervous about this. I've never had this happen before and didn't know about this pressure valve. Could I have overloaded pressure on hydro system by lifting so quickly before pressure built up? When does the valve close? Any ideas?

( . I would be interested to know how much it will cost for the new transmission...Mike

Me too.

 

[RonR]

I don't know what caused the HST to fail, but I do know from a past life that when an HST is run without oil (like a major leak), they will self destruct in very short order.

First sign or smell of hydraulic fluid, ya gotta shut them down, or it will be expensive.

I feel for ya.

ron

 

[Soundguy]

Any time i see fluid leaking at a QD.. it's best to turn off everything.. release pressure and reseat.

Also.. I don't think there is any 'time' involved in coming up to pressure. Assuming a PD pump.. it is at max pressure immediatly.. and GPM is effected by eng speed.. Also.. the relief valve is probably always closed.. unless you are overloading the system and ten it opens to vent pressure.. etc. I'm not familiar with your tractor.. but that's how most of them work in general terms..

Soundguy

(2000 BX2200 with about 300 hr.) A month ago, I did a full day of ground engagement loader work with the toothbar. No problems. Sunday, I cranked up to remove loader and tiller, put on MMM. I did lift loader with tb with engine cold at low rpm, immediately after crankup so garage wouldn't fill with sooty exhaust. I noticed hydro fluid leaking from chassis. That line that plugs into loader when on, and back into tractor when off was wet with fluid (just had all quick connect hydro couplers replaced in Feb.). Then noticed constant stream of fluid racing along line from near rear of tractor and pouring to ground from beneath seat. As I moved tractor, it made several quite large puddles on garage floor. I am quite nervous about this. I've never had this happen before and didn't know about this pressure valve. Could I have overloaded pressure on hydro system by lifting so quickly before pressure built up? When does the valve close? Any ideas?



Me too.

 

[Soundguy]

can cause Cavitation or oil starvation / foaming.... which them snowbalss the effect....

Soundguy

I when an HST is run without oil (like a major leak), they will self destruct in very short order.

First sign or smell of hydraulic fluid, ya gotta shut them down, or it will be expensive.

I feel for ya.

ron

 

[KubZilla]

(2000 BX2200 with about 300 hr.) Then noticed constant stream of fluid racing along line from near rear of tractor and pouring to ground from beneath seat. As I moved tractor, it made several quite large puddles on garage floor. I am quite nervous about this. I've never had this happen before and didn't know about this pressure valve. Could I have overloaded pressure on hydro system by lifting so quickly before pressure built up? When does the valve close? Any ideas?
.

Tom, I have about the same year model and hour total as yours. I couldn't ever see the actual leak, but it seemed to be leaking from under the seat and down the back of the transmission. It leaked about a cup of fluid in a three or four minute period . It continued to leak until I shut it off. As soon as I got home and washed it off, I started it back up, and had no leaks, so I put it to work and found no more leaks. Since I was very close to 300 hours anyway, I changed all the fluids, and they looked fine. It doesn't leak now, and I havn't had any more problems. I was afraid that I had blown a seal or something, but then I read something about the relief valve, and just figured that I got lucky this time. Time will tell...Mike

 

[Soundguy]

Do the hyd reliefs on these tractors vent to outside? From reading a few messages here.. it is apparrent that they do.. or people think they do...

Do they not vent to sump.. like many other brands do? Seems kinda environmentally .. uh.. harsh to have hyd relief valve to vent outside the tractor.???

Soundguy

 

[N80]

Pressure relief valves don't vent fluid out do they? I just assumed they vented it back into the tranny.

Edit: Oops, we had the same thought at the same time. I've had my relief valve kick in many times. Never seen a drop of fluid.

 

[Tom_H]

I need to do startup and see what happens. It surely seems more sensible that the valve would drain back to the reservoir than to the exterior. I'm thinking this is too much of an investment to take a risk on. Sounds like I need to make a trip to the service dept.

 

[KubZilla]

Do the hyd reliefs on these tractors vent to outside? From reading a few messages here.. it is apparrent that they do.. or people think they do...

Do they not vent to sump.. like many other brands do? Seems kinda environmentally .. uh.. harsh to have hyd relief valve to vent outside the tractor.???

Soundguy

I'd love to know where they vent. You are right that it doesn't make sense that they vent outside. But if they don't, then I wonder what was causing the leak under my seat? I'm not sure that I want to hear the answer...Things that make you go Hmmm.

 

[Dan239]

I'd love to know where they vent. You are right that it doesn't make sense that they vent outside. But if they don't, then I wonder what was causing the leak under my seat? I'm not sure that I want to hear the answer...Things that make you go Hmmm.

Sounds to me like you got it hot enough to cause some of the fluid to go out the overflow. I assume yours has an overflow, mine does and it is at the back of the seat right beside the filler plug. This has nothing to do with the relief valve, it is an overflow to get some fluid out when it has too much in it.

Daniel