Posted by T.C. in TX on December 12, 2009 at 07:46:05 from (24.153.226.6):
This was posted on the John Deere forum with no response. Maybe more eyes will see it here and someone can help.
I just finished replacing the clutch on my 2010 industrial backhoe/loader. The new clutch works fine, but the hydraulic pump seems to not be working. This pump is located behind the clutch and works the power steering and the syncro plates in the transmission.
Nothing was disassembled on the pump which worked fine before the clutch job. I did of course have to disconnect the power steering lines that go to the front wheels, but nothing else was disassembled.
Upon start-up after the clutch job, the hydraulic pump doesn't seem to be working. It seems to be engaging, but is making a "dry" sound like it isn't getting oil or something. I tried the disconnect lever just under the clutch on the left side and it changes the pitch somewhat, but the noise doesn't go away. Also when I engage the powershaft for the rear hydraulic pump for the backhoe and loader there is more "dry" sound coming from that unit and there is not enough pressure to lift anything.
What could I have done wrong? Is it possible there is air in the system? I did clean the filter before this operation and it was working fine before. I did jack up the front wheels and cycle the steering from side to side at least a dozen times thinking that may help purge any air. I also cracked the lines while cycling the steering wheel and almost no oil comes out.
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