B26 tlb hydraulic issues

[mmargush]

Hello,
First time poster. I've searched with no findings on the same issue I have. My B26 loses it's hydro prime while sitting. Occasionally loses hst while in motion till all the air works out. the problems showed after I did a hydro fluid change with filters. using the gold kubota super udt2 as recommended ..OUCH! I'm wondering could a check valve in the filters have gone bad? or where should I look for an air leak? I've had to replace an oring on the hoe manifold and one on the loader set as well. but an fine after those repairs. Today (30 degrees F) my steering turns fine at idle but as soon as you throttle up it gets tough.... Multiple issues or related?
Any ideas?
thanks in advance!

 

[Gary Fowler]

Sounds like a gasket is leaking on the hydraulic filter. Did you check to see if the old gasket came off with the old filter? If you need to remove the filter, use the old vacuum on the oil filler hole trick to keep the oil from pouring out when you remove the filter. There is a video on TBN on exactly how it is done, but pretty simple, just turn on the vacuum, put the suction hose in the filler hole and let it run while you remove the filter and examine the filter connection. There will be some oil from the filter to run out, but the reservoir should remain drip free.

 

[mmargush]

I haven't had a chance to check it out yet. I'll grab new filters this week and swap. I wondered about the gasket after watching that video of the vacuum trick. I'll report back. Thanks for the idea!

 

[mmargush]

changed the filters last night. everything looked ok. I only bought a gallon to refill teh system with and had troubles with the vacuum trick. I actually had fluid suck into the vacuum and then it filled( little 1 gallon vac) and then lose it's suction, of course right when filter was spun off and I was trying to inspect it! lost about 3 gallons till i spun old filter back on and got the boy to come hold vac hose with an air gap in it. Hope to get fluid today yet if the snows let me get out after work.

 

[Gary Fowler]

changed the filters last night. everything looked ok. I only bought a gallon to refill teh system with and had troubles with the vacuum trick. I actually had fluid suck into the vacuum and then it filled( little 1 gallon vac) and then lose it's suction, of course right when filter was spun off and I was trying to inspect it! lost about 3 gallons till i spun old filter back on and got the boy to come hold vac hose with an air gap in it. Hope to get fluid today yet if the snows let me get out after work.

Did you find an old gasket still in place on the tractor?

 

[Gary Fowler]

I don't know how you managed to suck any oil out from the filler hole. I actually tried to do that when I overfilled mine during the repair to the filter housing and couldn't get any to come out. I even tried to rig up a hose to go inside, but there is some obstruction about an inch down that wont allow a 3/4" hose to go in. I even tried to suck up oil from the dipstick but didn't manage to get much out of there either. I ended up removing a hose from the stabilizers and pumping it out via the tractor hydraulic system. If you were sucking up oil from the filler hole, you likely had it over filled any way.

Another place to look for an air leak would be the rubber 90 Ell where the steel suction pipe from the filter goes into the pump. Also there are a couple of O-rings on the filter housing itself that may be bad (not likely but another place to check) One is on the intake side of the filter housing where it goes into the tractors reservoir and the other is on the rigid pipe coming out of the filter housing. I recently replaced my filter housing so I know about those AND how difficult it is to get that darned thing off and on. Those O-rings are two different sizes by the way, similar but different.
I would think that if you don't have any leaks there when not running that the O-rings are good. The rubber 90 ell wont leak when not running as it is above the fluid level and it could get damaged from sticks etc if doing brush clearing, so I would closely look at that also if you still have a problem.

 

[dabadas]

Hello,
First time poster. I've searched with no findings on the same issue I have. My B26 loses it's hydro prime while sitting. Occasionally loses hst while in motion till all the air works out. the problems showed after I did a hydro fluid change with filters. using the gold kubota super udt2 as recommended ..OUCH! I'm wondering could a check valve in the filters have gone bad? or where should I look for an air leak? I've had to replace an oring on the hoe manifold and one on the loader set as well. but an fine after those repairs. Today (30 degrees F) my steering turns fine at idle but as soon as you throttle up it gets tough.... Multiple issues or related?
Any ideas?
thanks in advance!

I'm having the same issue. After sitting there is air in the hydraulics. But not in the HST. After idling and the hydraulics start working, I notice that when I rev it up they stop. Got to be sucking air from somewhere. I checked the rubber hose and the clamps seemed a little loose so I tightened them up. It didn't help. I have changed the oil and filters. The old gasket came off with my old filters so I don't think that is the problem. How tight should I tighten them? I'll be following along to see what happens

 

[dabadas]

Any help?

 

[dabadas]

nothing?

 

[dabadas]

i guess is no one here anymore