Page 1 of 4 123 ... LastLast
Results 1 to 10 of 38

Thread: 1955 D4 6U Lift Pump

  1. #1
    Join Date
    Jun 2019
    Location
    Skiatook OK
    Posts
    18

    Default 1955 D4 6U Lift Pump - Questions

    Well after hours and hours of searching on the web and here my last resort is to just post my question and see someone can steer me in a direction. Thanks for any help in advance.

    S/N 6U11019

    The back story:
    Purchased for $1800(us).
    This thing has been sitting for ~20yrs but I was able to get the pony started within an hour or so of messing with it. Runs decent but needs the carb cleaned up. The starter pinion was rusted extremely bad but I was able to get it out, disassembled and back in working order.

    Was out today and tried to start the main engine but never could get the lift pump to push fuel. I pulled the block apart where fuel enters the pump and cleaned it all up, pretty nasty. The plunger is pretty hard and the nipple was funny shaped. Not sure how good itís sealing. From reading posts this seems to be pretty critical. Can anyone point me to a part number for a replacement? The spring still seemed in good shape. Fuel runs from the tank to the inlet well.

    I pulled the top cover off and the filters out and it was dry as a bone in there. We filled it with fuel and with each injector loosened were were able to get fuel at each.

    Other than the plunger or bad gears is there any other reasons this wouldnít be pushing fuel?

    Also can someone inform me on the lubrication system of the injector pump?

    Thank you.

    60918598-C181-4DF3-9E40-8C0E0005FD9B.jpeg
    Last edited by OK-Grant; 06-23-2019 at 12:17 PM.

  2. #2
    Join Date
    Jun 2019
    Location
    Skiatook OK
    Posts
    18

    Default

    On a side note right now Iím trying to get this running just enough to load on a trailer and get home. Working on it 30 miles away isnít the most convenient.

    Just some more pictures for your enjoyment.

    B13DE0D9-0159-4BFB-9DEB-D71F85BBC374.jpg

    70B87B8B-A0FF-4A65-BEEF-DD72F6E03D6E.jpg

    7A9C28BD-2FDB-4D12-A492-44D8B1E47D15.jpg

    8B0E8B66-2D7D-42C7-AF83-604ECF842EBC.jpg

  3. #3
    Join Date
    Nov 2006
    Location
    McBEE, SC
    Posts
    2,214

    Default

    Quote Originally Posted by OK-Grant View Post
    On a side note right now Iím trying to get this running just enough to load on a trailer and get home. Working on it 30 miles away isnít the most convenient.

    Just some more pictures for your enjoyment.

    B13DE0D9-0159-4BFB-9DEB-D71F85BBC374.jpg

    70B87B8B-A0FF-4A65-BEEF-DD72F6E03D6E.jpg

    7A9C28BD-2FDB-4D12-A492-44D8B1E47D15.jpg

    8B0E8B66-2D7D-42C7-AF83-604ECF842EBC.jpg
    Ouch on pic#2, what did you do to fix the broken housing?
    If you need one, advertise here and you may find it.
    Good luck on your project and thanks for sharing.
    D2 5u & 3J
    212 9T
    RD4
    D4 7J & 7U
    R4 4G
    Gas 35's
    Diesel 35
    Diesel 40
    Gas 50's 5A
    Diesel 50 1E1755
    Diesel 75
    D 8800 power unit 9J 6113SP
    LeTourneau D4 tournapull/Q Carryall
    Letourneau D Carryall's
    LaPlant-Choate CAB-97

  4. #4
    Join Date
    Jun 2019
    Location
    Skiatook OK
    Posts
    18

    Default

    Learned the hard way like others that you have to raise the pony to remove the starter pinion. A local yard had a used one in stock. One of the tabs were broken off but it works. Iíve video on line where a guy showed one that had been welded back together.

    After I get it running Iím going to have to pull off my lever that pushes on the pinion and build it up with some weld, its worn pretty bad and wont push far enough to fully engage the pinion. Lifting the handle and a pry bar gets the job done for now.

  5. #5
    Join Date
    Jun 2019
    Location
    Skiatook OK
    Posts
    18

    Default

    Letís see if this video works.


  6. #6
    Join Date
    Jun 2019
    Location
    Skiatook OK
    Posts
    18

    Default

    The day we started up the pony for the first time.


  7. #7
    Join Date
    Jun 2019
    Location
    Skiatook OK
    Posts
    18

    Default

    Think I mightíve thought of something that might be my problem. When I pulled off the block where the fuel enters the transfer pump it was pretty gooped up in there. Wondering if I could have pushed gunk the tube that feeds the filter body?

    Iím hoping I can get a plunger and spring for the assembly this week. And then maybe used some compressed air to blow back down the opposite direction and clear out the blockage if that is the case.

    Can anyone tell me how to pull the pump gear off so that i can install a new gasket that Iíve circled in the attached picture? Looks like there is a cross pin and then pull the gear off?


    86EACDE9-99C4-48B9-9FD0-C65BEEF51585.jpg

  8. #8
    Join Date
    Nov 2006
    Location
    Corralitos, Ca.
    Posts
    14,463

    Default

    Drive gear is held on by the retaining nut w/cotter pin and is keyed to shaft. It's the pump gear that is pinned to the shaft.

  9. #9
    Join Date
    Nov 2006
    Location
    McBEE, SC
    Posts
    2,214

    Default

    I could be remembering wrong, but I thought I saw a service bulletin about that gasket, where it was made in two pieces so it didn't have to be taken apart to put on a new gasket. That is, the inner captive ring was separate.
    Last edited by STEPHEN; 06-23-2019 at 04:33 PM.
    D2 5u & 3J
    212 9T
    RD4
    D4 7J & 7U
    R4 4G
    Gas 35's
    Diesel 35
    Diesel 40
    Gas 50's 5A
    Diesel 50 1E1755
    Diesel 75
    D 8800 power unit 9J 6113SP
    LeTourneau D4 tournapull/Q Carryall
    Letourneau D Carryall's
    LaPlant-Choate CAB-97

  10. #10
    Join Date
    Jun 2019
    Location
    Skiatook OK
    Posts
    18

    Default

    Thanks for the info guys.

    Anyone know about the oil for the injector pump?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •