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  1. #1
    Silver Member
    Join Date
    Jan 2007
    Posts
    127
    Location
    Carmel, ME
    Tractor
    Kubota B7100

    Default B7100 Hydraulics Question

    I have a FEL on my B7100 and it runs off a pump that comes off the front of the crankshaft. It seems to be weak, I was wondering why the FEL is run off this pump and not the tractors pump? The pump isn't being used for anything and thought about using it to run the FEL.

    amitysanimal

  2. #2
    Bronze Member
    Join Date
    May 2007
    Posts
    61
    Location
    Toronto, Ontario
    Tractor
    Kubota B7100,Ford NAA, Kubota L220 GST

    Default Re: B7100 Hydraulics Question

    On my 7100 the FEL is run off the engine pump, not the front of the crank shaft and everything works well. Not sure why there'd be a pump on the front unless it was added after the engine pump gave up.
    Cheers,Erik

  3. #3
    Silver Member
    Join Date
    Jan 2007
    Posts
    127
    Location
    Carmel, ME
    Tractor
    Kubota B7100

    Default Re: B7100 Hydraulics Question

    My FEL came with the pump that runs off the end of the crank, shows it in the loader manual. My FEL is model B219 and is on a 1977 B7100. I might try to hook it up to the tractor pump and see how it does.

  4. #4
    Elite Member
    Join Date
    Jul 2006
    Posts
    2,881
    Location
    Meridian Idaho
    Tractor
    Kubota B7100D

    Default Re: B7100 Hydraulics Question

    Seems weak as in? I have the same loader and tractor. Have you checked the screen to see if it is clogged?

    Charles

  5. #5
    Silver Member
    Join Date
    Jan 2007
    Posts
    127
    Location
    Carmel, ME
    Tractor
    Kubota B7100

    Default Re: B7100 Hydraulics Question

    It doesn't seem to have enough power and it will squeal. I don't think it is the relief valve squealing, it sounds like the pump to me, seeing as how the relief valve is so close to me. Yes, I have checked the screen and it is clean. The tractor has over 7500 hours on it, so I imagine the pump is pretty worn out. I haven't checked into how expensive it would be to rebuild the FEL pump.

  6. #6
    Veteran Member
    Join Date
    Jul 2000
    Posts
    1,344
    Location
    West Virginia (Eastern Panhandle)
    Tractor
    '78 Kubota B6100DT

    Default Re: B7100 Hydraulics Question

    I have a 1978 B6100 with the B219 loader and front-mounted pump. I found that in the winter here in WV the kubota UDT would get very thick and cause the pump to squeal due to cavitation/starvation and the loader to operate very slowly. My dealer actually told me to thin the UDT out with diesel fuel in the winter. It works.

    Just my experience..

    WVBill
    WVBill

    1978 Kubota B6100 w/FEL, 38" box blade, 6' Rake, PHD

  7. #7
    Elite Member
    Join Date
    Jul 2006
    Posts
    2,881
    Location
    Meridian Idaho
    Tractor
    Kubota B7100D

    Default Re: B7100 Hydraulics Question

    I think the loader is supposed to pick up 500 pounds..... when it was brand new I keep meaning to test mine with bags of wood pellets. Mine can pick up a level bucket of dirt with some grunting so it works for me.

    You might be getting some fluid going past the seals in the cylinders... might just need a repack and not a new pump.

    It doesn't have to be very cold for my loader to realy slow down... once you excercise it a bit it and warm up the fluid it works just like it does during warm weather.

    Charles

  8. #8
    Gold Member
    Join Date
    Sep 2007
    Posts
    280
    Location
    Western US

    Default Re: B7100 Hydraulics Question

    The best answer on a pump or loader lift issue is to have your dealer do a flowrate test on it. This will determine if the pump can still move the volume of oil at rated engine speed and also check the relief valve for the right pressure.

    If you just change out the pump and the relief valve is stuck partially open, the new pump will not be any better. Just like going to the Dr, let the dealer check the complete circuit.

    By the way, in cold country don't thin UDT with Diesel - use Super UDT that has a pour point depressant to keep it flowing to minus 46 C - after that it is too cold to work outside anyhow and your wife should let you into the kitchen to thaw out!

    Good luck

  9. #9
    Member
    Join Date
    Mar 2006
    Posts
    25
    Location
    SE Virginia
    Tractor
    Kubota B6100D

    Default Re: B7100 Hydraulics Question

    I don't mean to hi-jack. I run what I thought the manual calls for. Type F Tranny fluid. Is that ok? My B219 sure worked better when i learned about the screen and cleaned the years of gunk off it.
    Rory
    Kubota B6100D Sabre 2554

  10. #10
    Veteran Member
    Join Date
    Oct 2005
    Posts
    1,049
    Location
    New Hampshire, USA
    Tractor
    Kubota B6100

    Default Re: B7100 Hydraulics Question

    My B6100 with factory FEL runs off the engine pump. It seems alot of aftermarket FEL's used pumps that run off the front crank or PTO. If you search by my name you can see some of the pics I posted of the pump setup. My loader will lift almost anything I put in it until the rear comes off the ground but it is slow in cold weather.
    Mike
    B6100 w/ power steering - link below
    http://www.tractorbynet.com/forums/k...has-power.html

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