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2630 Slow 3 Point Lift

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Rob Maloney
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PostPosted: Mon Mar 18, 2013 1:15 pm    Post subject: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

Got a 2630 that has had the hydraulic pump rebuilt, new filter, full on fluid, steering valve rebuilt, etc with a loader. Loader operation seems fine. 3 point lift is SLOW. Just wondering what the potential problem might be given the work that has recently been completed. Steering can get a little goofy when using the loader. Wondering about the stroke control valve and if so, can it be replaced without removing the pump. Just replaced water pump and getting tired of working on this ol" gal. Thanks.
 
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MarknWaterloo
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PostPosted: Mon Mar 18, 2013 4:04 pm    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

The 40-series had a speed adjustment on it. Just a "small rod with threads that can be turned by a wrench" (I guess this filter won't let me post the technical term for such a part) you could turn in or out. Not sure about the 30's though.
 
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Tx Jim
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PostPosted: Tue Mar 19, 2013 3:23 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

MarknWaterloo wrote:
(quoted from post at 19:04:45 03/18/13) The 40-series had a speed adjustment on it. Just a "small rod with threads that can be turned by a wrench"


Mark
Can you explain more on this speed adjustment? Granted it's been a long time since I studied the rockshaft control linkage on a JD utility tractor but a "speed adjustment for raising" I don't remember.Thanks,Jim
 
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Tx Jim
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PostPosted: Tue Mar 19, 2013 3:32 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

Rob Maloney
Was sump screen checked/cleaned at the same time hyd filter was changed?? Was stand-by pressure checked after hyd pump rebuild? Stand-by should be in the 2250-2350 psi range. How is loader plumbed??? It's possible the pressure control(priority) valve down by hyd filter is blocking flow/psi. It's also possible that rockshaft control valve clearances are too wide. This clearance can be adjusted by turning screw(parts key #9) Does tractor have either option of hyd hi-lo or ind pto?
 


Last edited by Tx Jim on Tue Mar 19, 2013 3:34 am; edited 1 time in total
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MarknWaterloo
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PostPosted: Tue Mar 19, 2013 3:57 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

Sorry, but I don't have an electronic copy to post a pic at the moment, but there's a nut (hope that makes it past the filter) with a lock nut up under the seat, just in front of the seat frame mounting. Out is faster, in is slower.
 
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cannonball
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PostPosted: Tue Mar 19, 2013 4:11 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

have you checked the valve under the seat,,,some have little lever and some are set with a wrench
 
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tim s
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PostPosted: Tue Mar 19, 2013 4:56 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

You guys are referring to the "rate of drop" valve, has nothing to do with the speed of the hitch 'raising' A slow hitch raising is attributed to oil flow, a problem in the priority valve, is normally where to start if the stand by pressure is good at 2250psi.
 
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Tx Jim
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PostPosted: Tue Mar 19, 2013 5:24 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote


Parts key #8 in photo. As Tim stated only affects lowering of 3 pt but has nothing to do with raising time.
 
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Rob Maloney
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PostPosted: Wed Mar 20, 2013 10:06 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

Jim,
Loader is plumbed thru port in the filer. Where is the sump screen once the filer has been removed?. How do you access the priority valve? Does it matter that the loader function appears to be unaffected?

Thanks. You helped me a couple years ago with a steering valve cavitation problem. I'm getting sick of this 2630. Are they a dog in an otherwise good family (John Deere) of tractors? Is there a better JD utility tractor in this HP range suited well for a loader?
 
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Tx Jim
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PostPosted: Wed Mar 20, 2013 11:05 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote


IMHO 2630's didn't give any more hyd problems than any other JD utility tractor with the same options such as hyd ind pto & hi-lo. If loader is plumbed behind the priority valve then priority valve shouldn't be a problem. As far as a better JD utility tractor the 50 & 55 series(2555/2755) were hard to beat. Ist photo is priority valve and 2nd photo shows location of sump screen.
 
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tim s
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PostPosted: Wed Mar 20, 2013 11:25 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

If the loader is working good that kinda makes the priority valve check out good too, since the oil for both come through the same porting, there is a flow valve on the top front of the rockshaft that may need attention,, I don"t have a picture of that handy right now..
 
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Tx Jim
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PostPosted: Wed Mar 20, 2013 11:49 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

Here's the photo that Tim was referring to. The valve is parts key #10
 


Last edited by Tx Jim on Wed Mar 20, 2013 11:50 am; edited 1 time in total
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Rob Maloney
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PostPosted: Sat Mar 23, 2013 6:21 pm    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

Update. Went up today to check out the flow valve that Tx Jim spoke of. While warming up the engine, I decided to work the 3 point a few times for the heck of it. Turns out, if I position the remote valve lever in the "neutral" position the 3 point would raise at the correct speed for 2 orc3 cycles. Then I would move the lever to the "activated" or forward position once the 3 point started raising slow, and it would raise at the appropriate speed a time or two, then I"d have to return the lever to the neutral position again To get it to raise at the normal speed. Plus, it seemed to labor the engine some. Is there a valve sticking somewhere? I went ahead and pulled the flow valve, and it appeared to be in good condition with no obstructions or dirt. Any ideas are appreciated...thanks.
 
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Tx Jim
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PostPosted: Sun Mar 24, 2013 3:44 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote


The scv needs attention. One or more of the 4 poppet valves are leaking
 
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Rob Maloney
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PostPosted: Sun Mar 24, 2013 9:28 am    Post subject: Re: 2630 Slow 3 Point Lift Reply to specific post Reply with quote

Are you talking about the Stroke Control Valve or the Selective
Control Valve? Thanks...
 
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