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Working On Replacing 9" Rear With 11" Bendix

Discussion in 'Early CJ5 and CJ6 Tech' started by mickeykelley, Sep 30, 2018.

  1. mickeykelley

    mickeykelley Well-Known Member

    I spent most of the day working on pulling the greasy mess that are my original 9" drums with the 11" self adjusting Bendix I bought. Interesting I found a grease fitting for the rear bearing. I missed it my first time looking for zerks. But not surprising based on the caked on grease back there. Sure enough, the FSM shows it as with and without. I doubt it's gotten any new grease in awhile. But it does now. In the FSM it says 'sparingly' every 2,000 miles. I can see where too much could clog the outlet, which was very impacted. So the question is what is sparingly? One pump? I can see where dirt, dust, water, etc., mixing with the grease will cause a clump of yuck. So how often do you guys pull the hub and clean the area out, just when doing brake job?
     
    mickeykelley, Sep 30, 2018
    #1
  2. Rick Whitson

    Rick Whitson Detroit Area 2024 Sponsor 2022 Sponsor

    Good Question, I put two pumps in mine every Spring when I take it out of Winter storage.
     
    Rick Whitson, Oct 1, 2018
    #2
    dozerjim likes this.
  3. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    If you look how that's designed all you're actually doing is pumping grease through the space behind the bearing & out the weep hole, there's no guarantee that the fresh grease will actually make it into the bearing at all and if it does it's pushing the old greae past the seal & into the brake area.

    Not one of their better designs.

    I made up some 1/4" thick bearing retainers & drilled a 3/16' hole radially through it so grease would work it's way through the bearing & exit out the retainer hole.
     
    Howard Eisenhauer, Oct 1, 2018
    #3
  4. mickeykelley

    mickeykelley Well-Known Member

    I actually watched the new red grease push old grease out so I know it's getting in there. In fact I did this multiple times and spun the axel to work as much of the old grease out since no telling how long it's been.
     
    mickeykelley, Oct 1, 2018
    #4
  5. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Was this with the seal removed?
     
    Howard Eisenhauer, Oct 1, 2018
    #5
  6. Glenn

    Glenn Kinda grumpy old man Staff Member

    I agree with Howard about the design not being that great. I think a couple of pumps with a grease gun and confirming that old grease comes out is about all one can do short of disassembling and repacking the bearings by hand. That's basically all I've ever done over the years.
     
    Glenn, Oct 1, 2018
    #6
  7. Keys5a

    Keys5a Sponsor

    I used to put one pump of grease in every year the Jeep was used regularly. I used to clean out the sheetmetal retainer/grease catcher on the shoe side of the backing plate every few years as grease was pushed past the seal.
    -Donny
     
    Keys5a, Oct 1, 2018
    #7
  8. mickeykelley

    mickeykelley Well-Known Member

    Yes, with the outer grease seal removed so I could see it squeeze out of the section of the bearing.
     
    mickeykelley, Oct 1, 2018
    #8
  9. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    OK, but when the seal & hub are installed there's no place for the grease in the bearing to be displaced- assuming it's not blocked surplus grease will be squeezed out the weep hole behind the bearing. if it is blocked the grease *will* come out through the bearing but in that case it's pushing past the seal into the brake area & if you don't periodically clean out the retainer as Donny alluded to you're going to have greasy brakes :(
     
    Howard Eisenhauer, Oct 1, 2018
    #9
  10. mickeykelley

    mickeykelley Well-Known Member

    So your saying greasy brakes is an issue????? I thought that would help cut down on pad wear.:bananatool:

    I'm thinking of making it part of the maintenance to put a hook wire in there and see if anythings in the hole.
     
    mickeykelley, Oct 1, 2018
    #10
    cookieman and Glenn like this.