NX6010 suction side hydro leak

[justman777]

Eric, I'm not sure there's a new redesigned suction side hydro-filter assembly. I think it's just a new part...as in never used before...but possibly without some unknown defect.

Honestly, I don't know that there's an issue with the filter assembly itself insomuch as there's the possibility for air to be introduced via incorrect assembly. As I'm sure you're very well aware, the tubing from the sump to the filter assembly is a BEAR to get on, and puts unnecessary pressure on the filter assembly. It needs to be bent back towards the center of the tractor a bit more. I wonder if the extra pressure is warping or deforming the o-ring as it goes inside the banjo fitting. I wound up installing the tubing first, pushing the filter assembly onto it, and then adding the forward half (pump side) of the tubing assembly. It was tougher any other way. I almost wanted to call my dealer and ask about cutting the rear tubing and installing more clear tubing using clamps, similar to the pump side of the suction tubing. Would have made it way easier to install. If they did it to the front, I don't see any harm in doing it to the back...

 

[DieselBound]

For those having problems, what kind of transmission?

Found a note about issues with charge pumps (HSTs) and got to wondering whether air could be being introduced via the HST fluid circuitry.

From the manual (page 435):

The HST is not equipped with a charge pump, but uses
oil drained from the steering unit (4).

The secondary pump (15) in the main gear pump (driven
by fuel cam shaft in the engine), which supplies oil
to the steering system, takes over the function of the
charge pump in HST.

The route of the charge fluid is as follows:
Transmission case → sunction pipe → oil filter (1) →
secondary gear pump (15) → modulator valve (3) →
steering unit (4) → oil cooler (6) → HST filter (7) →
HST (8) → transmission case

On page 457, [HST] Troubleshooting, under Delayed Response, Possible Cause of "There are bubbles in the fluid" shows Action of "Repair the inlet line of gear
pump."

 

[YLee Kioti]

For those having problems, what kind of transmission?

Found a note about issues with charge pumps (HSTs) and got to wondering whether air could be being introduced via the HST fluid circuitry.

From the manual (page 435):

The HST is not equipped with a charge pump, but uses
oil drained from the steering unit (4).

The secondary pump (15) in the main gear pump (driven
by fuel cam shaft in the engine), which supplies oil
to the steering system, takes over the function of the
charge pump in HST.

The route of the charge fluid is as follows:
Transmission case → sunction pipe → oil filter (1) →
secondary gear pump (15) → modulator valve (3) →
steering unit (4) → oil cooler (6) → HST filter (7) →
HST (8) → transmission case

On page 457, [HST] Troubleshooting, under Delayed Response, Possible Cause of "There are bubbles in the fluid" shows Action of "Repair the inlet line of gear
pump."

Dumb question but the manual your reading from is it for the NX series?

Cause looks like we are building a lots of good possible solutions.
When i show this thread to my dealer hope he takes the time to read it.......all....

 

[DieselBound]

Yes, the NX Service Manual.

 

[YLee Kioti]

Ah...Thank you grass hoppah....

 

[MinnesotaEric]

Eric, I'm not sure there's a new redesigned suction side hydro-filter assembly. I think it's just a new part...as in never used before...but possibly without some unknown defect.

Honestly, I don't know that there's an issue with the filter assembly itself insomuch as there's the possibility for air to be introduced via incorrect assembly. As I'm sure you're very well aware, the tubing from the sump to the filter assembly is a BEAR to get on, and puts unnecessary pressure on the filter assembly. It needs to be bent back towards the center of the tractor a bit more. I wonder if the extra pressure is warping or deforming the o-ring as it goes inside the banjo fitting. I wound up installing the tubing first, pushing the filter assembly onto it, and then adding the forward half (pump side) of the tubing assembly. It was tougher any other way. I almost wanted to call my dealer and ask about cutting the rear tubing and installing more clear tubing using clamps, similar to the pump side of the suction tubing. Would have made it way easier to install. If they did it to the front, I don't see any harm in doing it to the back...

When I rolled a stump under my tractor a few summers ago (see video below) I bent my hard suction lines and the bracket holding the filter housing, using new parts I had to fit everything like a gun smith. I would have been money ahead simply taking my old, bent parts off and bending them back. Anyway, I'm familiar with the hasstle-factor--a little more for me since I have skid plating in the way.

 

[justman777]

For those having problems, what kind of transmission?

Found a note about issues with charge pumps (HSTs) and got to wondering whether air could be being introduced via the HST fluid circuitry.

From the manual (page 435):

The HST is not equipped with a charge pump, but uses
oil drained from the steering unit (4).

The secondary pump (15) in the main gear pump (driven
by fuel cam shaft in the engine), which supplies oil
to the steering system, takes over the function of the
charge pump in HST.

The route of the charge fluid is as follows:
Transmission case → sunction pipe → oil filter (1) →
secondary gear pump (15) → modulator valve (3) →
steering unit (4) → oil cooler (6) → HST filter (7) →
HST (8) → transmission case

On page 457, [HST] Troubleshooting, under Delayed Response, Possible Cause of "There are bubbles in the fluid" shows Action of "Repair the inlet line of gear
pump."

I would expect any leaks after the pump to spray hydro fluid all over the place. Everything is fully pressurized after that, so no real way for air to get in.

 

[justman777]

All---I'd greatly appreciate someone who is NOT having the issues described above taking a video of their fill port and posting it for comparison purposes. Looking to see if you get bubbles or the fluid spraying sound.

Thanks in advance!

 

[DieselBound]

Just a quick note (really busy and only had time for something simple): I pulled my fill port plug and could definitely hear a whooshing (fluid spraying) sound going on.

 

[justman777]

Just a quick note (really busy and only had time for something simple): I pulled my fill port plug and could definitely hear a whooshing (fluid spraying) sound going on.

Thanks! And you're not having any issues like us (loader "halting" or "jerking" when raising at lower RPM, gurgling transmission noise, foam in hydraulic fluid reservoir, jerkiness in reverse)?