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580SE Hydraulic Pump Coupling

Discussion in 'Tractor/Loader/Backhoes' started by bowen, Jan 2, 2012.

  1. bowen

    bowen Senior Member

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    Pump_Spline_480_11-19-11 017.jpg

    My question is this.
    How long will this splined shaft above last:confused::D

    I found this when I was changing the tensioner & belt almost by mistake.
    These coupling must wear oblong holes around the mounting bolts.
    This is a Case D140524 coupling I think.
    Coupling_314_11-19-11 019.jpg

    I went to the local Case dealer & he sold me an aftermarket Tisco # 291061 for the price of a Case Part ~$60, but later I found these online for less than $30.
    I do like this coupling however because it appears to be longer than the original. No grease fitting but seems greasing this is controversial with some mechanics anyway.
    Old_New_448_11-19-11 020.jpg

    This was harder to squeeze down in the gap, but it fits maybe 1/4" deeper onto the worn out spline.
    Mine is all back together and working, but I wonder from experience how bad you view the worn spline.
    I only use the machine around the farm, probably not even 50 hours a year.
    The guy where I bought it looked only at the old coupling and told me I just as well order a pump which is at least $750.
    He said when you crank the engine, it may just strip out these remaining splines, and destroy the new coupling also but so far it's working OK.
    My pump is the dual style that also powers the power steering.

    Looks like maybe only the shaft could be replaced.:pointhead

    Am I gonna have trouble???
     
    Last edited: Jan 2, 2012
  2. 1080 bobcat

    1080 bobcat Well-Known Member

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    you may get away with the pump shaft being worn for a while but it will let go when you are in a bind
     
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  3. Tinkerer

    Tinkerer Senior Member

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    I was replacing the fan belts (2) on my 680C and found the pump shaft and coupling were in the identical shape yours is in. I replaced the shaft & seal in the pump and the coupling on the front engine pulley. I did not want to risk replacing only one part because I think it would have only accelerated the wear on the older part and at the same time destroying the new one.
    I quite often position the backhoe in places that a pump failure would be a real bad thing to have happen. Especially if were because I had not done the proper repair. The parts were awful expensive. But I think it was money well spent just for the peace of mind and not having to wonder when the stupid thing was going to let loose. I am sure we all have heard Murphy's Law
    Anything that can go wrong will go wrong
     
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  4. sheepfoot

    sheepfoot Senior Member

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    Around the farm i would do the same thing, install it and go, if I had a crew that used it every day I would replace the pump, the splines could go an hour or 2000 hrs, but you have time to shop for the best pump price now and can get some work done. You will alway's pay in the begining/middle/or the end!.
     
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  5. bowen

    bowen Senior Member

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    Wow.. 1 hour to 2000 hours.
    I was hoping for a shorter gap between the estimation. :D
     
  6. Leon Phelps

    Leon Phelps Well-Known Member

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    with the amount paid for the advice, I think you got what you paid for.
     
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  7. cburns

    cburns New Member

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    I just purchased a TBL 550. When I went to change the alternator belt I noticed that there is a driveshaft, I presume going to the hydraulic pump, coming off the front of the crankshaft pulley. Is there a trick to removing the drive or getting around it with the belt because I'm not seeing any easy access? The book doesn't show anything there unless I'm missing something. I know the answer is going to be... "welcome to my world" but figured I'd ask...coming from an aviation background where they actually take access into consideration. Any help would be greatly appreciated.
     
  8. bowen

    bowen Senior Member

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    If the Ford is like a Case & I think it uses the same style coupling, the 4 bolts have to be removed and the coupling moved out far enough to get the belt thru the crack, & it's a pain.
    Sometimes the spline is rusted and the coupling is hard to move.

    I had radiator problems & had to remove my radiator & oil cooler anyway, so the job was easier.

    I hope the Ford has more room in there than mine did, because it is not easy to get a wrench on the bolts.
    Be sure to inspect the coupling carefully and put a new one in if the holes are worn egg shaped like my pictures show above.

    There is more threads on this someplace, suggesting you change the tensioner also with a new belt.
    Here is one to read and I can't find the other ones at the moment.
    https://www.heavyequipmentforums.co...ASE-580SK-fan-belt-change&highlight=tensioner


    Coupling_480_11-19-11 022.jpg
    This is a Case 580SE viewed from the left side with the radiator removed.

    Good luck!
     
    Last edited: Jan 21, 2012
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  9. cburns

    cburns New Member

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    TLB 550 Alt/Fan Belt

    At least I know what I'm up against. I put the old belt back on and pray it makes it to warmer weather. It's tight to get to but I noticed when the bucket is raised it gives more access. I'll let you know how it turns out.
    Thank you for the advise.
    Regards,
    Chris
     
  10. bowen

    bowen Senior Member

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    Remember this old post?
    Well I think those splines in the 1st post finally failed.
    I do not have it off yet but I can hear it chattering.
    This was after I tried to pull up a Walnut Tree stump, and it was under lots of load.
    I did get about 60 hours of run time on these worn splines.
    I have found an aftermarket pump at Finneys for $700.
    I hope it's of decent quality.
     
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  11. Vetech63

    Vetech63 Senior Member

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    Check the coupler splines also. They may need cleaned up from spinning over the pump shaft.
     
  12. DMiller

    DMiller Senior Member

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    Was gonna note, they will last until fail!! In that conditions failure was imminent at best.
     
  13. joe--h

    joe--h Senior Member

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    mikebramel likes this.
  14. Vetech63

    Vetech63 Senior Member

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