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Subject: Vane type Hydraulic Pump Kit for Ford NAA

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Steve Diehl    Posted 02-25-2019 at 13:21:00 [URL] [DELETE]        [Reply] [Email]  
  • Vane type Hydraulic Pump Kit for Ford NAA
  • I have done the testing to confirm that the pump is too wore out to produce enough pressure and just ordered the 5/8 Thick Vane Type Hydraulic Pump Kit from Yesterday's Tractor. Does anyone have experience with this kit? I see it comes with the body/rotor/vanes along with 2 O-rings. I am not sure how much I will need to take apart when I receive the kit and am wondering if I might be needing the seal and any gaskets that show up on the exploded parts view I found online. The pump does not leak now. I can still do some snow plowing (blade on front with cable going back to hydraulic arms) and do not want to take the pump apart until the kit arrives. I can plow for 15-20 minutes at a time before it stops lifting the bade. Any advice regarding installing the kit would be appreciated.
    Thank you,
    Steve

    TheOldHokie    Posted 02-25-2019 at 13:53:08 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Vane type Hydraulic Pump Kit for Ford NAA
  • You should not need anything else. IIRC you remove the 4 (?) hex head cap screws holding the body together and it separates in the middle. Replace the middle section with the new parts and button it back up. You could replace the o-rings that seal the tubes to the body if you are of a mind but they are easy to replace later if the old ones leak once it is back together.

    It should be a quick job and much simpler than the piston pumps!!! I would be interested in hearing how it works out.

    TOH

    Steve Diehl    Posted 02-26-2019 at 12:17:25 [URL] [DELETE]        [Reply] [Email]  
  • Re: Vane type Hydraulic Pump Kit for Ford NAA
  • What does IIRC stand for? Are you saying this can be done without removing the whole pump assembly? That would be great! I will let you know how it works out. The tracking says I should receive the kit Monday. Thanks

    TheOldHokie    Posted 02-26-2019 at 13:29:33 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Vane type Hydraulic Pump Kit for Ford NAA
  • IIRC = If I Recall Correctly

    And I did not - it has been a while and I forgot about the manifold bolted to the bottom - another 4 bolts. You need to remove the pump from the tractor and take it to the work bench for disassembly. A bench vise is helpful. Here are some pictures I just took.

    1. The top picture is the pump as removed from the tractor.
    2. Next is the pump after removing the manifold on the bottom of teh pump. Two paper gaskets I had forgotten.
    3. Next is the pump in the vise back end up
    4. Last is the pump after removing the four cap screws and separating the sections. The vane and rotor is still on the splined input shaft and lifts right off. Above that is the rotor end plate on the left, spring thingy in the middle, and the body is in the right. The HyTrol valve assembly is just above the body.

    You probably can't see it in the picture but there is a lot of wear on the face of the rotor end plate where the vanes run. That might cause bypassing problems after a rebuild.

    Took me less than 5 minutes to break it down. Assembly is just the oppositie of diasassembly - drop in the new rotor, vanes and housing with new o-rings, place the end plate on the back of the rotor, and button it back up with a new o-ring. Botl the manifold back on the bottom and ready to go back on the tractor.

    TOH




    Steve Diehl    Posted 02-27-2019 at 05:17:28 [URL] [DELETE]        [Reply] [Email]  
  • Re: Vane type Hydraulic Pump Kit for Ford NAA
  • Thanks TOH, I will let you know how it goes.

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