Oil- Hydraulic Filter Difference

[TTTTTT]

Post #3 from me

I know when it is cold and very cold my hydraulics work almost immediately which indicates a lower viscosity for the universal fluid leading to maybe the filter micron size would be less. Make sense?

Hi Bob, i have no issues with my cold hydraulics, mine are very responsive quickly, but I know some have had issues and moving to a larger micron filter seemed to help. (less restricted flow)

Dave

 

[RonMar]

I think the confusing term being used here is the word filter. In the case of the factory spin-on cartriges used on the hydraulic system suction line before the pump inlet, the term strainer should be used. IE filters have fluid pumped thru them and strainers have fluid sucked thru them. With that terminology applied, I also don't know of anyone using a hydraulic FILTER larger than 40 or 50 micron. In my experience they are typically 10-20 micron. Hydraulic pumps are great at pumping fluid to high pressure. They are not so great at sucking fluid in. On the suction side, 150 micron would be appropriate for a STRAINER. Anything less and you run the risk of starving the pump for oil and causing damage to it.

The in-tank screen mesh strainer that came on my tractor was I believe #100 mesh, that equates to approximately 150 Micron hole size.

Got an old hydraulic spin-on? Cut it in two. I would be surprised if it contains a paper/cellulose element and not a piece of #100 mesh screen...

 

[Bob Rooks]

It depends on the capacity of the suction filter/strainer Ron.
I run a Zinga AE25 (25µ) filter (pleated cellulose fiber) on the suction side of my Prince 7 gpm pump for the backhoe. No problems at all and the pump is quite happy.

Most all hydraulic filters have a built in free-flow by-pass valve that will open at ~15 psig or 20"hg, depending on if you are sucking or pushing. This prevents cavitation, or the filter exploding.

 

[TTTTTT]

I think the confusing term being used here is the word filter. In the case of the factory spin-on cartriges used on the hydraulic system suction line before the pump inlet, the term strainer should be used. IE filters have fluid pumped thru them and strainers have fluid sucked thru them. With that terminology applied, I also don't know of anyone using a hydraulic FILTER larger than 40 or 50 micron. In my experience they are typically 10-20 micron. Hydraulic pumps are great at pumping fluid to high pressure. They are not so great at sucking fluid in. On the suction side, 150 micron would be appropriate for a STRAINER. Anything less and you run the risk of starving the pump for oil and causing damage to it.

The in-tank screen mesh strainer that came on my tractor was I believe #100 mesh, that equates to approximately 150 Micron hole size.

Got an old hydraulic spin-on? Cut it in two. I would be surprised if it contains a paper/cellulose element and not a piece of #100 mesh screen...

You guys have a lot of experience compared with me, but this is the one that would X reference to mine (140 Micron) unless it is a typo. It is a great conversation. The more info and dialogue the better.

Hydraulic Filter, 5.745"

Dave

 

[Bob Rooks]

Bummer Dave, "catalogue session has expired". Dead link. Sorry.

 

[greg_g]

Just go to the NAPA website and look up FIL 1614 Bob.

//greg//

 

[TTTTTT]

Hi Guys
I guess the links dies, heres the details on it

Dave


Part: FIL 1614
Product Line: NAPA Filters

Price Unit 31.99
Features & Benefits

NAPA Gold Oil Filters Hold 45% More Dirt + Last 30% Longer Than Other
Leading Competitive Brands.; 141 Micron

Attributes
Height (Inches) : 5.745"
Gasket I.D. (Inches) : 2.5"
Gasket I.D. (mm) : 63.5 mm
Gasket O.D. (Inches) : 2.865"
Gasket O.D.(mm) : 72.77 mm
Gasket Thickness (Inches) : .125"
Gasket Thickness (mm) : 3.18 mm
Height (mm) : 145.92 mm
Hydraulic Filter Style : Spin-On Hydraulic Filter
O.D. (Inches) : 3.73"
O.D. (mm) : 94.74 mm
Thread Size (Inches) : 1-12

 

[Diamondpilot]

Costly little bugger. I would try to find a more economical replacement.

Chris

 

[Bob Rooks]

Dave,
Do you intend to use this filter for your engine oil or is it for your hydraulic system?
The Zinga 100 mesh hydraulic "strainer" is much cheaper.
See it here: http://www.zinga.com/index.aspx?page=products&seriesid=135

This is the assembly I use on my backhoe's hydraulic system:
https://www.surpluscenter.com/item.asp?UID=2009111223250909&item=9-4544&catname=. It is rated at 25 gpm and I'm only running 7 gpm through it. It doesn't even go into bypass when the oil is cold.
It's not uncommon to find all three methods of filtering in industrial hydraulic systems:
1) Suction - protects the pump, 2) Pressure - protects the valves and actuators (cylinders), and 3) Return line - keeps the reservoir contaminant free.

 

[TTTTTT]

Dave,
Do you intend to use this filter for your engine oil or is it for your hydraulic system?
The Zinga 100 mesh hydraulic "strainer" is much cheaper.
See it here: Zinga Industries, Inc.

This is the assembly I use on my backhoe's hydraulic system:
https://www.surpluscenter.com/item.asp?UID=2009111223250909&item=9-4544&catname=. It is rated at 25 gpm and I'm only running 7 gpm through it. It doesn't even go into bypass when the oil is cold.
It's not uncommon to find all three methods of filtering in industrial hydraulic systems:
1) Suction - protects the pump, 2) Pressure - protects the valves and actuators (cylinders), and 3) Return line - keeps the reservoir contaminant free.

Sorry for the delay, gone for a few days.. It is for my hydraulic replacement. Thanks for the info all. I see the the one is a 141 micron size. I'll have to do a little more research and see.
I don't have a big problem with the price as it is not a yearly replacement with the hours I put on. I also still have one more OEM filter.

Dave