Pwr Steering Gearbox
12-30-2019, (Subject: Pwr Steering Gearbox ) 
Post: #1
Pwr Steering Gearbox
International CM870 Engine not that matters with this scenario I do not think anyway

Replaced Main Compressor, afterwards the Pwr Steering system is sucking Air and pushing it out the reservoir.
Replaced on lines / hoses for system.

I have been told there is no way the compressor is back feeding air into the Pwr Steering Pump???

So that just leaves the Gearbox that is 6 Months old.

Any thoughts before I go to replace this expensive / pain in the ___ Gearbox lol
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12-30-2019, (Subject: Pwr Steering Gearbox ) 
Post: #2
RE: Pwr Steering Gearbox
Was steering pump removed? If so maybe has air in system. Jack up truck steer all the way lefthold for a second then to the right .. DO this a few times and should get all air out
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12-30-2019, (Subject: Pwr Steering Gearbox ) 
Post: #3
RE: Pwr Steering Gearbox
Yes Pump was removed and have bled system over and over but seems to be sucking air somewhere. But I will try again
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12-30-2019, (Subject: Pwr Steering Gearbox ) 
Post: #4
RE: Pwr Steering Gearbox
Was the filter changed in the reservoir? I've seen blockages collapse the suction line and cracks in both halves. They seem to vibrate at idle like crazy...
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12-31-2019, (Subject: Pwr Steering Gearbox ) 
Post: #5
RE: Pwr Steering Gearbox
Is it pushing the oil out after you put the cap on the reservoir? My 9400i churns PS fluid fairly hard when the trucks running.
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12-31-2019, (Subject: Pwr Steering Gearbox ) 
Post: #6
RE: Pwr Steering Gearbox
Filter has been changed and is pushing out after put the cap on. I turn it all the way to left and leave it and after a few minutes it will quit boiling. Then when I turn it back to the right it starts again. And whines
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12-31-2019, (Subject: Pwr Steering Gearbox ) 
Post: #7
RE: Pwr Steering Gearbox
I don't see how it could be the steering box. I wouldn't mess with that. Its something you had apart.
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12-31-2019, (Subject: Pwr Steering Gearbox ) 
Post: #8
RE: Pwr Steering Gearbox
Download how to purge air instruction from gear box manufacturer, drain everything and start over.
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12-31-2019, (Subject: Pwr Steering Gearbox ) 
Post: #9
RE: Pwr Steering Gearbox
Gearbox has not been apart , it is 3 Month old
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