INLINE HYDRAULIC FILTER?

[Anonymous Poster]

It would seem like most of the dirt entering the hydraulic system would be from either the loader or backhoe cylinders, if used in mud etc. I know the seals do a good job of keeping dirt out but it seems like it would work it's way in.

It would seem like preventing it from going back to the main sump would have some benefit. Since both my backhoes are set up with "quick release" fittings, it would seem simple to add an inline filter if such a thing is available, something cleanable maybe. Has anyone seen such a thing? I realize it would have to be much more stout than a typical inline fuel filter since the pressure is so high.

I've also wondered why when the cylinders are assembled they don't slip an additional seal or o ring on the cylinder rod to "pre-clean" the rod as it goes back in the cylinder, so the seal doesn't have to do the whole job.

Seems like this would be a good idea on those exposed Kubota BX hydraulic steering rods as well.

I realize many people won't be running their BX's on rough ground so they have contact, and not everyone uses their backhoe or loader in the goo, but sometimes I have.

Del

[email]oldcarparts@mygarage.com [/email]

 

[Anonymous Poster]

Your idea of putting a filter on the return is a good idea - most farm supply companies carry hydraulic filters, and it would be simple to add one in the circuit. But, be sure the filter will handle the pressure and volume of return line. If it goes back to the slump, there should not be a problem, but if its like the rear outlets on the JD 790, they go to the 3pt controls, and filter and mount would have to handle 2000+ psi. You can tee a guage inline to check the pressure. Let us know how it works.

 

[W5FL]

Hi Del,

I wouldn't have thought you would get much silicon past the seals. Lets see, they have 2800# of hydraulic fluid on one side and dust on the other. That is a tough migration. I would think that MUCH more dirt enters the hydraulic system when you plug and unplug the quick connects especially if they are not kept well covered.

Be extremely cautious about filters in hydraulics lines. They should be rated for full hydraulic pressure and the little screw on cannister types are NOT. My Kubota has two HUGE Cannister filters that the hydraulics oil runs through. Just seems like that would be enough. Guess you need to spend $10 and get a hydraulic oil analysis each month and see if you are actually getting any dirt in the system.