keg1 Posted October 20, 2016 Share Posted October 20, 2016 85 R model power steering was making oil. Changed pump with one off parts truck seemed ok for a couple days then the same thing. I found the one line was collapsed, it was just rubber hose so I replaced all lines and it was ok for about 3 weeks now it's making oil again and although it's not full it's pushing oil out of the reservoir. I figure it has to be sucking it out of compressor but don't know why. It's only about an inch over full so I don't know how it's coming out of reservoir and running down frame. Any ideas? Quote Link to comment Share on other sites More sharing options...
41chevy Posted October 20, 2016 Share Posted October 20, 2016 All the air bled out of the system? That will cause that symptom. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
gearhead204 Posted October 21, 2016 Share Posted October 21, 2016 is the filter plugged,? is the reservoir plumed properly? is there a dip stick on the canister fill plug? is the oil black? 1 Quote Link to comment Share on other sites More sharing options...
keg1 Posted October 21, 2016 Author Share Posted October 21, 2016 22 hours ago, gearhead204 said: is the filter plugged,? is the reservoir plumed properly? is there a dip stick on the canister fill plug? is the oil black? I never knew there was a filter in them. Replaced it today. It has a dipstick and yes the oil is black. Quote Link to comment Share on other sites More sharing options...
gearhead204 Posted October 22, 2016 Share Posted October 22, 2016 I will venture to guess that changing the filter will resolve this issue but I would also change the oil as well should be (motor oil) the oil should stay semi clean not crank case black if it does turn crank case black I would take a hard look at the compressor as to why its not draining back to the pan, the coupling area of the power steering pump should not be getting pressurized crank case oil. 1 Quote Link to comment Share on other sites More sharing options...
keg1 Posted October 22, 2016 Author Share Posted October 22, 2016 11 hours ago, gearhead204 said: I will venture to guess that changing the filter will resolve this issue but I would also change the oil as well should be (motor oil) the oil should stay semi clean not crank case black if it does turn crank case black I would take a hard look at the compressor as to why its not draining back to the pan, the coupling area of the power steering pump should not be getting pressurized crank case oil. When I replaced all the lines I put fresh oil in and I wondered why it got black so quick. After I found the line that was kinked shut I figured it couldn't get oil and somehow was sucking it out of the compressor. Worked fine for a couple weeks and then started again. Thanks for info on filter. Filled with fresh oil and I'll try it out next week. Quote Link to comment Share on other sites More sharing options...
farmer52 Posted October 22, 2016 Share Posted October 22, 2016 I did not realize the PS pump is connected to the air compressor. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment Share on other sites More sharing options...
39 Baby Mack Posted October 22, 2016 Share Posted October 22, 2016 Some of the older END sixes and E6s were mounted on the back of the compressor. E7's were mounted on the front of the timing gear cover. They were all driven off the auxiliary shaft. Ron Sent from my SM-G900V using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
gearhead204 Posted October 22, 2016 Share Posted October 22, 2016 thanks for the save Ron! I thought for sure I had seen the pump mounted off the compressor but haven't looked at an e6 for about 6 years now and was starting to doubt myself 1 Quote Link to comment Share on other sites More sharing options...
blackdog2 Posted October 22, 2016 Share Posted October 22, 2016 That is why mack use motor oil because pump seal separates the 2 fluids apart if use power steering fluid it will go into the engine. 2 Quote Ed Link to comment Share on other sites More sharing options...
ranchhopper Posted October 23, 2016 Share Posted October 23, 2016 I need to rebuild the power steering pump on my superliner same type of pump do they make a rebuild kit for them mine leaks the oil down into the compressor if it sits for a long time. Quote Link to comment Share on other sites More sharing options...
39 Baby Mack Posted October 23, 2016 Share Posted October 23, 2016 I don't know about a kit, I used to buy the "O" rings, the seal, and a new shaft. That would fix it. Ron Sent from my SM-G900V using Tapatalk Quote Link to comment Share on other sites More sharing options...
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