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Ultradog MN
Tractor Guru
Joined: 22 Apr 2001
Posts: 12560
Location: Twin Cities
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 Posted: Thu Nov 08, 2012 11:18 am Post subject: 3000 hydraulic pump part 2 |
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I'm still not getting this pump to bleed properly and/or the lift arms to stop chattering.
They say if you aren't much of a mechanic keep changing parts till you find the problem.
I have had 3 different pumps on this tractor, including an NOS pump that I have. They all do the same thing.
I have had both ends of the suction line off, cleaned them with lacquor thinner and gooped them with silicone.
I have bled about 3 gallons of oil out of the pump - high speed, low speed.
I blew lacquer thinner through the suction line to possibly clean out the filter.
Getting frustrated here.
What should I do?
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leej
Regular
Joined: 02 Apr 2009
Posts: 164
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| Posted: Thu Nov 08, 2012 12:40 pm Post subject: Re: 3000 hydraulic pump part 2 |
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| Ultradog MN wrote: | (quoted from post at 20:18:16 11/08/12) I'm still not getting this pump to bleed properly and/or the lift arms to stop chattering.
They say if you aren't much of a mechanic keep changing parts till you find the problem.
I have had 3 different pumps on this tractor, including an NOS pump that I have. They all do the same thing.
I have had both ends of the suction line off, cleaned them with lacquor thinner and gooped them with silicone.
I have bled about 3 gallons of oil out of the pump - high speed, low speed.
I blew lacquer thinner through the suction line to possibly clean out the filter.
Getting frustrated here.
What should I do? |
Take it and $50,000 to JD dealer & be sure lift works before you take the new 'green' one home. That or build yourself a wooden tractor, that you can fix. 
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Vito
Tractor Guru
Joined: 17 Aug 2004
Posts: 5719
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| Posted: Thu Nov 08, 2012 12:46 pm Post subject: Re: 3000 hydraulic pump part 2 |
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Any pinhole leaks in the lines?
Vitoi
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Ultradog MN
Tractor Guru
Joined: 22 Apr 2001
Posts: 12560
Location: Twin Cities
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| Posted: Thu Nov 08, 2012 2:22 pm Post subject: Re: 3000 hydraulic pump part 2 |
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Well, I don't know what I did but it started working properly. Darned things!
I had put the old pump back on and let it run about 1k rpm for a while.
Dunno.
I will run it again tomorrow to see if it holds prime. Hope so. I wish I knew why it wouldn't prime before though. Just to better unterstand it all.
Thanks to all!
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RickB
Tractor Guru
Joined: 16 Oct 1998
Posts: 4556
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| Posted: Thu Nov 08, 2012 2:38 pm Post subject: Re: 3000 hydraulic pump part 2 |
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Silicone usually causes more problems than it ever fixes. New o-rings of the proper size and clean, smooth surfaces on the suctioon tube and adapter where the seals contact are necessary.
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Bern
Tractor Expert
Joined: 05 Apr 1999
Posts: 2772
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| Posted: Thu Nov 08, 2012 4:11 pm Post subject: Re: 3000 hydraulic pump part 2 |
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I've had more than one of those pumps do exactly what you describe. One thing is for sure, they don't bleed very fast.
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Hobo,NC
Tractor Guru
Joined: 14 Jun 2007
Posts: 10639
Location: Sanford, NC
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| Posted: Thu Nov 08, 2012 4:20 pm Post subject: Re: 3000 hydraulic pump part 2 |
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| Ultradog MN wrote: | (quoted from post at 02:22:37 11/09/12) Well, I don't know what I did but it started working properly. Darned things!
I had put the old pump back on and let it run about 1k rpm for a while.
Dunno.
I will run it again tomorrow to see if it holds prime. Hope so. I wish I knew why it wouldn't prime before though. Just to better unterstand it all.
Thanks to all! |
Just the same as mine did... Like magic it quit chatter'n... I had replaced all the O-rings in the hydraulics except any internal to the pump... It chattered so bad I you would thing something was in a binde...
I do not buy into a o-ring leaking on the suction tube were it enters the rear case in my opinion you can rule that one out as a possible issue...
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Greg Wolodkin
Long Time User
Joined: 02 Oct 2007
Posts: 534
Location: Massachusetts
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| Posted: Sun Nov 11, 2012 4:49 am Post subject: Re: 3000 hydraulic pump part 2 |
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Glad to hear you got it working. When you put the new pump back on, how much priming did you do? I ask because I've done all the things you mention except for the silicon, and then some.. actually removed and cleaned the suction filter, replaced the paper filter, replaced all O-rings in the lift cylinder and all the square-cut seals on both ends of the plumbing to the pump. Lift works but chatters.
Maybe it will work its way out of that funk, but if I can accelerate the process ...
Last edited by Greg Wolodkin on Sun Nov 11, 2012 4:51 am; edited 1 time in total |
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flyingace
Regular
Joined: 01 Jul 2011
Posts: 164
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| Posted: Sun Nov 11, 2012 7:40 am Post subject: Re: 3000 hydraulic pump part 2 |
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| Ultradog MN wrote: | (quoted from post at 15:22:37 11/08/12) Well, I don't know what I did but it started working properly. Darned things!
I had put the old pump back on and let it run about 1k rpm for a while.
Dunno.
I will run it again tomorrow to see if it holds prime. Hope so. I wish I knew why it wouldn't prime before though. Just to better unterstand it all.
Thanks to all! |
Don't want to rain on your parade, but mine does this as well. I think I have it fixed because it's working every time I start it up. The next thing I know, it won't lift - have to prime it again. Hopefully, yours is permanent.
Since mine is just a chore tractor, I live with it. But I have to admit, not knowing what's causing it irks me.
Last edited by flyingace on Sun Nov 11, 2012 7:41 am; edited 1 time in total |
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