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D4h cylinder grease fittings

Discussion in 'Dozers' started by 354d, Nov 17, 2019.

  1. 354d

    354d Active Member

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    This pic is of the lift cylinders on a D4h 8PB01747 . Does this require greasing? I don’t see any reference to greasing these fittings in the owner’s manual. Thanks, Carr
     

    Attached Files:

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  2. Nige

    Nige Senior Member

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    I may be missing something but tare there actually grease fittings in the end of the cylinder rods.? It's hard to see from the photos whether it's a blind hole or not.
    If there are grease fittings, the frequency should be daily or every 10 operating hours whichever fits your operating regime best.
     
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  3. 354d

    354d Active Member

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    I can’t tell how you are supposed to grease this cylinder rod end. There are no 1/8”npt pipe threads to install a zero fitting. All of the cylinders on this dozer are set up the same way. I thought someone on this website might have a similarly equipped dozer. Thanks
     
  4. hosspuller

    hosspuller Senior Member

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    Grease fitting in the pin ???
     
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  5. Tinkerer

    Tinkerer Senior Member

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    The only sure way to know if it is possible to grease them would be pull the pin and look for a hole in the bushing.
    I doubt there is one in them.
    I ran a service / lube truck many years ago and saw a lot of rod ends like that. Never worried about it needing to be greased.
     
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  6. 354d

    354d Active Member

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    The pins do not have a grease fitting. Thanks.
     
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  7. DMiller

    DMiller Senior Member

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    That Alignment hole is for Lathe Tooling centering when the shaft was built. It is not a lube point and the pins should be grease fitting equipped unless someone changed them out.
     
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  8. Bluox

    Bluox Senior Member

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    That machine has 2 grease fittings on the blade and they are both on the pin that holds the blade to the C-frame and they are 50 hour fittings. I'm gonna bet they won't take grease.
    Bob
     
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  9. 354d

    354d Active Member

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    I will search for these grease fittings on the blade. I had hoped that the operator manual that I bought from Caterpillar would have information on these grease fittings, but it doesn’t. Thanks
     
  10. 354d

    354d Active Member

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    Makes sense about this mystery hole.

    The pins are not equipped with grease fittings. Thanks
     
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  11. kshansen

    kshansen Senior Member

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    Did some digging on SIS and it appears that there are three different cylinder arrangements most notable is the difference between the 3G9226 Chg04-05 and the 3G9226 Chg6-06. Those numbers should be on tags welded to the barrel of the cylinders.

    First is the Chg04-04:
    Chg04-05.png
    Note #8 Rod shows no grease fitting?

    Next is the Chg06:
    Chg06.png Note that now there is a #14 grease fitting?

    Still trying to find on SIS the C-Frame with the attaching pins for some reason I'm hitting a dead end so far.

    Not sure why it took so much digging but finally found the C-frame:
    C-Frame.png
    Note that Pins #2 do not call for fittings but pin #31 has a grease fitting #34, not shown in part number list but they are there.

    Also note that when I cropped the picture of the two cylinders above I did not show the other end, but the same thing goes for that end the 04-05 cylinder does not show a grease fitting while the 06 cylinder does show a grease fitting.

    And while I getting all anal on this the cylinders that do NOT have the grease fitting use a 7J6003 bushing and the cylinders with the grease fittings use a 9T8421 bushing in both ends.
     
    Last edited: Nov 19, 2019
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  12. DMiller

    DMiller Senior Member

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    Hardened sleeve bearing, polished surface minimal rotation expected type bushing. Pins would wear if are the softer material as does not rotate all that much unlike a loader or hoe. Simplifies life.
     
  13. 354d

    354d Active Member

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  14. ttazzman

    ttazzman Well-Known Member

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    zoom in on my file picture and you will see mine(8pj01482) has a fitting on the top of the cylinder end...would be on bottom if installed upside down.. 20180724_153028.jpg
     
    Last edited: Jan 9, 2020
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  15. InsleyGuy

    InsleyGuy Well-Known Member

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    In 1986? I got the 4th d4h sold in Michigan, 8pb00485. It had no grease fittings. They used "oil impregnated" pin bushings which turned out to be not the greatest idea. Not sure when they corrected that, probably by the series II units?
     
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