Noisy throwout bearing, no grease fitting?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Matt1924, Aug 2, 2020.

  1. Matt1924

    Matt1924 Light Load Member

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    Hey everyone, any ideas on how I'm supposed to grease this thing? Lots of rattling when idling in neutral or lower rpms under a load. Can't find a grease fitting anywhere. Any help would be appreciated. Thank you
    FB55733E-9710-4119-AA0E-7A222B34D699.jpeg 3AA855C7-3598-4FDB-AE21-19E08001554A.jpeg
     
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  3. Goodysnap

    Goodysnap Road Train Member

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    It is supposed to have a remote gease line. There should be a rubber grommet it the inspection cover. Combination of brass fittings to attach the line. 1/8" pipe port on the bearing will be on the top or side of the of the bearing.

    Doable without tearing apart , but not fun.

    Biggest question, is the fitting broke off?
     
  4. Matt1924

    Matt1924 Light Load Member

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    Not sure about the inspection cover, my truck came with it missing. However, I did miraculously come across a video on Youtube on replacing the clutch brake and it had the same style fork as mine and the line was dangling from the top right portion. Here's a photo on where it should be, I'm going out in a few minutes to see if the fitting is there or missing. Thanks!

    3AFD8081-94D5-48ED-8A9A-F8451DFB3C60.jpeg
     
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  5. Goodysnap

    Goodysnap Road Train Member

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    Nope not where your circle is.

    Its gonna be above that on the top side. Gonna need an inspection camera or a mirror to see it. The remote line usually mounts on a bracket LF framerail.

    If you can get a fitting in it you might be able to just put a whip hose on it.
     
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  6. Claytonbigsby

    Claytonbigsby Bobtail Member

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    Sometimes there’s still an additional grease fitting installed on the very top of the throwout bearing even though you have a remote line, you have to reach way up there and feel around for it.
    Right above and inward of your circle is usually where the 1/8” pipe threads in, sometimes there’s a 2” nipple to extend it out past that cast nub (where your circle is) with a 90° elbow to exit the inspection cover, other times the hose will exit out the driver side of the housing
     
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  7. Heavyd

    Heavyd Road Train Member

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    Grease fittings are in the bellhousing, passenger side about 4 o'clock.
     
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  8. Matt1924

    Matt1924 Light Load Member

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    Thank you all for the responses. The fitting ended up being in the top, and I did have to use an inspection mirror with flashlight to find it up there. Was able to fish my grease fitting up to it and line it a bit. On the side of the bell housing is just a rubber grommet.
    Anyhow, greasing it up didn't seem to make much of a difference, it may be worn and need replacing. With 570k on it now, been thinking of replacing the clutch while in there anyway so I think I'll wait another month or two and get all that knocked out in one go.
     
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  9. AModelCat

    AModelCat Road Train Member

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    I'd add a remote line to the new one to make life easier.
     
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  10. Cattleman84

    Cattleman84 Road Train Member

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    Yes remote lines make things way easier... I grew up having to reach my arm way up inthere to grease the #### things... The first time I saw one with a remote line I had a face in palm moment... "Why the hell didnt I think of that years ago!"
     
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  11. AModelCat

    AModelCat Road Train Member

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    Every truck I've ever seen came with it from factory believe it or not.
     
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