M7040 Hydraulic Filters Change - Anyone Used The Suction Method to Reduce the Mess

[Captain13]

Just checking. Getting ready to change my filters. I always end up wearing a significant amount of hydraulic fluid beofore I get the filters off. I saw the videos where the L series guy used a shop vac in the fill port and lost very little fluid. Thanks for any responses.

 

[lynnmor]

It should work, I did it on a much smaller tractor. I would caution you on using too much suction, my concern is drawing debris in past the seals, I don't completely seal the vacuum hose and let a fair amount of air to bypass

 

[PoTreeBoy]

I would replace them one at a time.

 

[Dustyx2]

I've used on my M7060. It works.

 

[JasonW]

I have done it on my M6040. I would recommend having another person operate the shop vac instead of taping the hose to the fill port. I would rather not chance it coming loose when the hydraulic filter is not there.

 

[Captain13]

Thanks, guys. I have usually gotten drenched changing the filters. I guess there is a is a valve up in there that doesn’t seal until the filter is off and it opens when the new filter starts on and gives me a second dose of hydraulic fluid till the filter o-ring seals. I‘ll Have to look at how to avoid too much vacuum since my vacuum line will actually screw into the fill port.

 

[Ridger]

I use that method when changing the hydraulic filter on my L3940. It works fine and no worries about too much vacuum. You don't need to use that method when changing the HST filter (if you have an HST filter).

 

[Captain13]

I have done it on my M6040. I would recommend having another person operate the shop vac instead of taping the hose to the fill port. I would rather not chance it coming loose when the hydraulic filter is not there.

I shouldn’t have to tape to the fill port. I had a common 1 1/4(I think that’s the size) threaded PVC thread to glue adapter that screws right in to the port. The 1 1/4 hose slips right on it. it should stay put or I can use a ring clamp if needed. Thanks for the tip though. May have to get mama to run the vacuum.

 

[JasonW]

I shouldn’t have to tape to the fill port. I had a common 1 1/4(I think that’s the size) threaded PVC thread to glue adapter that screws right in to the port. The 1 1/4 hose slips right on it. it should stay put or I can use a ring clamp if needed. Thanks for the tip though. May have to get mama to run the vacuum.

I have done it on the M6040 and ZD331, I cannot remember for sure but one of them actually pulled oil into the shop vac, about 1/2 a gallon. It might have been the M as the normal oil level is only a few inches below the fill port.

 

[whitetiger]

I use that method when changing the hydraulic filter on my L3940. It works fine and no worries about too much vacuum. You don't need to use that method when changing the HST filter (if you have an HST filter).

M series has two suction filters below the pump which drain full bore with either filter off.

 

[Captain13]

M series has two suction filters below the pump which drain full bore with either filter off.

Yeah. Seemed like once the filter came off, it’s like a check valve stopped the flow. Maybe my memory is getting bad. I remember when putting the new filter on, I had to push up pretty firmly to get the threads to reach. Once I did that, the flow started again so I had to screw it on pretty fast to stop the flow.

i was at the dealer this morning and asked the mechanic how they did it. He said they use a pump like used on an air conditioning system. They pinch off the hydraulic vent line, apply vacuum and change the filters with very little loss. I’m going to give it a try.