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Old 04-19-2019, 02:23 PM   #15
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Big d9 , I saw in the online chassis service manual about the Meritor king pin lube procedure and it says also on the initial service to turn steering all the way in both directions to help get air out , Mine is way beyond an initial service but I gotta wonder if this is done by the pros on an initial service . Also , I have seen several other post and videos where folks say to jack the vehicle up but the manual on mine mentions nothing about jacking it up . I wonder if some manufacturers do require to jack it up or are these folks just wrong .
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Old 04-19-2019, 02:53 PM   #16
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Big d9 , I saw in the online chassis service manual about the Meritor king pin lube procedure and it says also on the initial service to turn steering all the way in both directions to help get air out , Mine is way beyond an initial service but I gotta wonder if this is done by the pros on an initial service . Also , I have seen several other post and videos where folks say to jack the vehicle up but the manual on mine mentions nothing about jacking it up . I wonder if some manufacturers do require to jack it up or are these folks just wrong .
When new, with small gaps between the shim, thrust bearing and spindle, greasing off the ground will usually work.

Once you get some wear, ( up and down movement ) between the parts, the grease is going to find the easy way out.

With the tires on the ground, the gap is up above the axle, where the shim is. Greasing the lower bushing, that way, will push the grease into and thru the very important, weight carrying thrust bearing below the axle.

If tires are off the ground, the gap appears between the thrust bearing and lower bushing. That creates a easy path for the grease to flow out before reaching the thrust bearing, leaving it slightly greased.

As with any bearing, lack of grease will cause it to wear and crumble. Any wear will increase the gap causing less grease to get to it each time.

I've seen trucks come in with god king pin bushings and no thrust bearing at all. That ruins the spindle and bottom surface of the axle due to metal to metal contact.

Out comes the whole axle and off to the rebuild shop.
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Old 04-19-2019, 03:44 PM   #17
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My philosophy in life is when in doubt I ask my wife. If that doesn't result in a logical instructions, then I follow the manufacturer recommendations. Win Win
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Old 04-20-2019, 11:03 AM   #18
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Twinboat, I gotta admit after thinking about it , you were correct to point out my advise was bad . Not pointing out to shoot grease till you see the new grease could lead someone wrong. I assure you though I know the correct way but if I don't write it correct it is still wrong. Anyway, my apologies for somewhat snarky response. BTW , here is a pic after I did a bit of cleaning, not finished yet but looks better. I have seen several grease jobs that look like the person or persons that did all the previous lubes, never thought of wiping any of the old grease off ever and this invites all sorts of dirt, dust to cling and probably isn't the best way to keep this thing in the best condition . Click image for larger version

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Old 04-20-2019, 11:05 AM   #19
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OH btw, i laid the coach on its side to do this.................. Nah, just forgot to crop pic as I was told to make it come out right side up.





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Old 04-20-2019, 12:03 PM   #20
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Twinboat, I gotta admit after thinking about it , you were correct to point out my advise was bad . Not pointing out to shoot grease till you see the new grease could lead someone wrong. I assure you though I know the correct way but if I don't write it correct it is still wrong. Anyway, my apologies for somewhat snarky response. BTW , here is a pic after I did a bit of cleaning, not finished yet but looks better. I have seen several grease jobs that look like the person or persons that did all the previous lubes, never thought of wiping any of the old grease off ever and this invites all sorts of dirt, dust to cling and probably isn't the best way to keep this thing in the best condition . Attachment 242828
Working on trucks, laying on a creeper, for 35 years, it looked normal to me.

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Old 04-20-2019, 12:21 PM   #21
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Geeze Darin, if the outside of coach looks as good as the greasy side does it must be shinning! It looks like you pressured blasted the suspension.
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Old 04-20-2019, 02:43 PM   #22
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Ha to both of you , I did get air springs on front . Waiting on back to come in.
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Old 04-21-2019, 10:34 AM   #23
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In the heavy equipment world we say "New grease coming out, no dirt going in".
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Old 04-21-2019, 11:37 AM   #24
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Pics of drivers side before I start cleaning , pass side was about like this .Click image for larger version

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ID:	243006 I had wiped quite a bit off on last grease job but as you can see plenty left
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Old 04-21-2019, 11:45 AM   #25
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Pic of pass side from back after some cleaning Click image for larger version

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Old 04-21-2019, 03:41 PM   #26
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ID:	243052Almost done on drivers side
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Old 04-21-2019, 05:41 PM   #27
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Darin, did you remove the tires/wheels to get to that area so you could get everything so clean. You are putting mine to shame!
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Old 04-22-2019, 04:48 AM   #28
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no , I have coach sitting on ramps that are 6" high and put some of those pads that interlock on floor and scoot under there and lay on my side with a sorta pillow to rest my head. At some times I sorta sit up in the wheel well except on front of drivers side.In all I would say this took maybe 3 to 4 hours . I am generally not a clean freak but I got into this while installing my air springs, kept rubbing my head on all sorts of greas, grabbing greasy parts and what not so I thought I would wiper her down and next thing I know I am under there with an assortment of plastic scrapers, little pics scrub brushes, even tried shop vac which surprisingly got some stuff or at least cleaned up the floor so I would not be scooting in greasy mess. I did wipe carefully with lacquer thinner on areas just to see what it would do, was careful tho not to get it on any rubber and or seems too much. Also on some areas I used my air blow gun but was careful not to blow grease into the brake drum .
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