2630 Slow 3 Point Lift

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.
 
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.
 
(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
 
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?
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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.
 
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.
 
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?
 

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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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..
 
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.
 
I have been dealing with a 2030 with similar issues, I have been dealing with this system since 1974,,and "still" I have trouble working out their problems,Darn it, On the one I am working on I have it narrowed down to the Priority valve, and I am going to order a new valve housing tomorrow morning, I think my bore is worn and allowing pressure oil to get past the sleeve and triggering the priority valve to the shut or low pressure position, all my stand by pressure is good, this seems to happen when i go to full throttle while working the loader..
 
(quoted from post at 19:21:09 03/23/13) 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.

You must have a 2 spool valve on your loader plugged into your rear outlet???--If so It sounds like you have an open center valve on the loader or a closed center valve thats leaking and acting like an open center valve-- some valves will work both open and closed center by changeing a plug on the boby of the valve- a square packing on the plug will sometimes blow out and let it leak by--If the 3 pt works when you put the SCV lever in neutral it must be the valve is wrong or leaking-- that would cause the punp to pull and labor the engine Just a thought!!
 

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