Whats the micron rating of the hydro oil filters ?

[The motor guy]

My old gravely 991088 compact pro 34 has a pump and wheel motor hydraulic system, not the integrated transaxle. I do believe the pumps are hydro gear, but the wheel motors are parker.

Here's gravely's part number for this filter. Supposedly it's a wix filter and only 40 microns. That seems kind of like a large micron size doesn't it?
00669300

 

[siriusc1024]

The filters I just put on the hydrostatic system of a Toro were 20 micron.

These types of hydraulic filters are designed for high flow. It's not like a hydraulic filter that's installed on a high pressure low volume pump running a hydraulic cylinder.

Maybe 40 microns is a little loose, but if it's the manufacturer part number then it's supposed to be that way so that it isn't too restrictive on the system.

 

[dnewton3]

The Wix 51519 is nominally rated at 32 um, based on the 00669300 input.