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8070 hydraulic problem
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Dwayne TX View Drop Down
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Joined: 11 Sep 2009
Location: Texas
Points: 221 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dwayne TX Quote  Post ReplyReply Direct Link To This Post Topic: 8070 hydraulic problem
    Posted: 10 May 2010 at 2:23pm

The line that runs from the pump at the cab firewall to the fluid cooler rubbed through.  I lost about 3 gallons of fluid before I got it shut down.  Replaced the line and refilled the fluid.  Now, with the 3-pt arms raised, the power steering gets 'jumpy' then almost non-existent.  Lower the arms and it goes back to normal. 

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kip in cny View Drop Down
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Joined: 29 Nov 2009
Location: Jordan NY
Points: 538 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kip in cny Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2010 at 2:30pm
sounds like air. 
160 CA 920diesel 5020 HD-3
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skipwelte View Drop Down
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Joined: 29 Oct 2009
Location: Anthon, Iowa
Points: 723 		Post Options Post Options   Thanks (0) Thanks(0)   Quote skipwelte Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2010 at 2:58pm

Did ya put the oil in the trans or rear end?  Power steering is off the gear pump and that gets oil from the trans.  The tube at the back of rear end housing below the cab window is the trans dipstick and fill tube.  It does sound like air.  Air will work its way out fairly quickly, Id double check the oil level.  HTH
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Dwayne TX View Drop Down
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Joined: 11 Sep 2009
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Points: 221 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dwayne TX Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2010 at 3:11pm
Refilled the trans  on the upper LH side (long tube w/dipstick) not the one above the top link w/o dipstick. 
I've run it off and on for about 30 minutes, working the steering and lift, then checking the fluid.  It's staying at the same level now. 
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20938 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2010 at 3:20pm
WRONG......Fill the rearend and check the sight glasses.............must be ten gallons or more low on oil.
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Dwayne TX View Drop Down
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Joined: 11 Sep 2009
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Points: 221 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dwayne TX Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2010 at 3:41pm
Sight glasses never showed oil to be low.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20938 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2010 at 5:41pm

Remove the top sight glass by unscrewing it.(they get foggy).........the oil you lost is from the orbitrol??..which is rearend oil.
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Gregor View Drop Down
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Joined: 11 Sep 2009
Location: Prague, Ne
Points: 305 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gregor Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2010 at 8:55pm

By chance, you didn't change out the hydraulic filters too.  I once forgot to put the pusher on the end of the filter and hand no or very little power steering.

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