Excessive Back Pressure in Auxiliary Lines

[Skid Steer Solutions]

We sell attachments for every machine. On XT machines we have had failures of motor seals in the attachments. I have heard that this is caused by a restriction in the return block mounted under the cab. Has anyone else ever heard of this? I never have seal failures except with Case.

 

[Fishfiles]

I would thnk that the seals blowing on attachmets is from excessive pressure , I think I would hook a flow meter/pressure tester to the aux couplers and gauge whats there and try to match it to the attachments , alot of attachments can't handle the full system pressure that the machines come set at , some can be tuned down by the relief vavle , I have installed a lot of pressure reducing blocks on hydraulic breakers and vibratory plate compactors to lower the pressure to the specs of the attachment as seal failure was a problem , also on the vibratory which is a one way flow , I have have problems with back pressure blowing th seals , on a controll valve set up that is bi-flow controll vavle sometimes you need to run a drain hose from the port on the plate motor back to the tank and /or reroute the return line to the tank and not thru the valve , some newer machines have a vavle that does the rerouting for you , one postion for one way flow another for bi-flow

 

[Fishfiles]

I would thnk that the seals blowing on attachmets is from excessive pressure , I think I would hook a flow meter/pressure tester to the aux couplers and gauge whats there and try to match it to the attachments , alot of attachments can't handle the full system pressure that the machines come set at , some can be tuned down by the relief vavle , I have installed a lot of pressure reducing blocks on hydraulic breakers and vibratory plate compactors to lower the pressure to the specs of the attachment as seal failure was a problem , also on the vibratory which is a one way flow , I have have problems with back pressure blowing th seals , on a controll valve set up that is bi-flow controll vavle sometimes you need to run a drain hose from the port on the plate motor back to the tank and /or reroute the return line to the tank and not thru the valve , some newer machines have a vavle that does the rerouting for you , one postion for one way flow another for bi-flow

What's up Triple S , having any progress on the seal failures , fishfiles