NX6010 suction side hydro leak

[YLee Kioti]

SO here is my update.
Had MLS valve replaced and the 3PH doesn't jump anymore.

The rear travel stutter was corrected with a download of software upgrade and calibration.
So rear travel is as smooth as forward direction.

I can now creep up under the oaks when cutting or along a fence line w/o worry of it stuttering and moving closer to objects then desired.

No issues of hydraulic foaming as far as dealer was concerned and told me he considered it normal. So, unless other issues crop up I'll not rile up my dealer needlessly. They have given me excellent support even when I'm in a lurch. They know I'm about 80 miles away so parts and service has been excellent.

Keep us posted justman777 on how your machine is progressing.

 

[justman777]

You bet. I haven't had much seat time in a while. So much going on right now!

 

[justman777]

It's been a while since I updated this thread, so figured I'd give it a go.

I took my tractor in to the dealer and they had it for close to two months. Unfortunately, they don't know what's going on with it. Good tech, and the dealer and tech seem like they want to help. Anyway, they decided to replace the pump as that's the only thing on the suction side that hadn't been replaced yet. We'd already replaced every single o-ring, the suction side filter housing, flexible tubing, clamps....everything except the metal tubing. So, after a bit of extended drama in dealing with Kioti support (or non-support, as it were), they got a pump and installed it for me and I went and picked it up.

Drum roll.....no change in how it behaves. I still get fluid aeration, stuttering in reverse, and a frequent noise in the HST that sounds like an impeller hitting an air pocket. No real performance issues, other than when I'm trying to back up to an implement with Reverse cutting in and out on me.

I changed hydro fluids today from the dealer supplied fluid to Mobile 424 in hopes the fluid was somehow causing the aeration. I captured a few videos of the reservoir with my snake camera to show what I'm getting. I apologize in advance for the camera orientation, the shakiness, and how dark the videos are. The camera I used wasn't terribly expensive, and I'm shoving it in a very dark hole.

The first video here shows the dealer fluid.

The second video here shows the Mobile 424.

Bottom line, the Mobile 424 didn't help. I'm not sure where the aeration is coming from at this point, but I know I want it fixed.

To be clear, my dealer has been great. All around good folks that are interested in doing the right thing. When were discussed the issue last, I asked them if they had contacted their Field Service Manager, and they weren't aware there was such a thing. So, I passed them the job description from the Kioti Careers web site, as well as the Linkdin profile of the regional Field Service Manager. Interestingly enough, the Field Service Manager's job description is about 90% travel, and they're supposed to deal with unresolved customer complaints. The dealer contacted them, and they're not traveling right now due to the virus. My last email to the dealer was to inform them that the issue still remains, and that I'd like to have the Field Service Manager come out and do some troubleshooting as soon as possible.

I like the HST, but that shuttle shift keeps looking better and better....

 

[justman777]

New video here. I start the tractor about 10 seconds into the video, and about 5 seconds after is when the aeration starts to come in. The hydro fluid doesn't show up in the foreground because the tractor is facing slightly downhill.

EDIT: I should have mentioned, there's no sound on the video.

 

[dusty3030]

I think it’s aerating down from the three point control down into the tank. Even at idle when you remove fill cap you can hear it spraying and can see the agitation.

 

[dusty3030]

And if you think about it it’s spraying down almost straight above where the suction line comes out of the bottom of the tank. If the stream straight down is introducing air it’s being sucked in and through the pump.

 

[LouNY]

Just for the heck of it have you tried overfilling it by 3 or 4 gallons?

 

[justman777]

Just for the heck of it have you tried overfilling it by 3 or 4 gallons?

Yes. That was early on....about 9 months ago. I filled it up to where it was coming out of the fill port. Got the same results.

 

[MinnesotaEric]

Seems to me there is a screen in the fitting at the three-point-housing/ rear-SCV-valve-stack on the hose that comes in from the power beyond port on the loader valve. You may want to pull that fitting out and inspect the screen for anything that could induce foaming.

Fluid wise, I'm using NAPA's J20C hydro-trans fluid. Kioti specs their hydro fluid between J20C and J20D and I cannot find a source for J20D (the cold weather spec hydro-trans fluid).

 

[justman777]

Seems to me there is a screen in the fitting at the three-point-housing/ rear-SCV-valve-stack on the hose that comes in from the power beyond port on the loader valve. You may want to pull that fitting out and inspect the screen for anything that could induce foaming.

Fluid wise, I'm using NAPA's J20C hydro-trans fluid. Kioti specs their hydro fluid between J20C and J20D and I cannot find a source for J20D (the cold weather spec hydro-trans fluid).

Any ideas about the screen that would induce foaming? Restrictions, or something else?