PeteN
Silver Member
I just changed both of the hydraulic filters on the MT3 at 61 hrs. I just about always cut apart any filter I change to see how much debris is in the filter. Here's both the filters cut apart.
The low pressure inlet filter is nothing special just large in size. Here's where just about all the debris I saw was trapped. Note in the last pic the large chunk that looks like when a drill breaks through a passage.
The high pressure filter is built heavy duty. In fact I could not use my oil filter cutter but instead a hack saw due to the thickness of the can. I couldn't remove the filter from the base so I just cut the filter can in 2 places. As you'll see there is a metal mesh inside the filter media and the filter pleats are glued to prevent collapse. The filter media is much tougher. I did not see any significant debris in this filter.
Here are the 2 filter P/Ns that are the OEM replacements.
Overall it looks like the 50hr recommended change of the inlet filter is not a bad idea. It appears these casting housings have debris in them from the factory. There was both ferrous and non ferrous material in the filter. I think I would stay with the stock LS high pressure filter (40383187) in my next filter change. I didn't see anything special in the low pressure filter (40007638) to sway my decision towards LS or other. Just to be clear, this filters are for a LS MT3 57 with S-HST which does use a different filter than the standard HST.
The low pressure inlet filter is nothing special just large in size. Here's where just about all the debris I saw was trapped. Note in the last pic the large chunk that looks like when a drill breaks through a passage.
The high pressure filter is built heavy duty. In fact I could not use my oil filter cutter but instead a hack saw due to the thickness of the can. I couldn't remove the filter from the base so I just cut the filter can in 2 places. As you'll see there is a metal mesh inside the filter media and the filter pleats are glued to prevent collapse. The filter media is much tougher. I did not see any significant debris in this filter.
Here are the 2 filter P/Ns that are the OEM replacements.
Overall it looks like the 50hr recommended change of the inlet filter is not a bad idea. It appears these casting housings have debris in them from the factory. There was both ferrous and non ferrous material in the filter. I think I would stay with the stock LS high pressure filter (40383187) in my next filter change. I didn't see anything special in the low pressure filter (40007638) to sway my decision towards LS or other. Just to be clear, this filters are for a LS MT3 57 with S-HST which does use a different filter than the standard HST.
