ARB locker install problem... - Defender Source
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  #1  
Old January 3rd, 2006, 03:34 AM
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Heath Ahrens
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Question ARB locker install problem...

I am having a problem with wobble (I think the backlash will be ok) on the crown gear when bolted up to the locker. I have taken it off twice and re-torqued both times and it is still at least .007" off (with locktite--- and getting it off the bolts every time on the wire wheel is starting to make me crazy). Also the kit I have is a bit different from the one in the Tech Articles. Does anyone have any experience with an ARB install?
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  #2  
Old January 3rd, 2006, 10:05 AM
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Heath,
use 8 bolts/nuts and attach the 2 halves of the locker together and install it without the ring gear. Measure just the carrier and see if your runout is there or in the ring gear itself. The new kits are a bit different. I always bend the ends of the wire clip to make it fit tighter.
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  #3  
Old January 3rd, 2006, 11:31 AM
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Good call! I would have thought of that (some day in the future).
But I will go and try it now...
Isn't it 10 bolts?

Could it be the pinion gear or the bearings that are wobbling it?
I had the bearings pressed on at a machine shop and they went on clean.

The halves never did come apart during the first ring gear install.
Couldn't I just check the runout on the actual locker itself? Without takeing off the ring gear again?
If it is the ring gear... can a machine shop do anything?
If it is the locker, what do I do?
I will know the answer shortly...

I need a step two... (I suspect the ring gear but we shall see).
What if there is no way to get rid of this wobble?

Thanks so much!!!
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  #4  
Old January 3rd, 2006, 02:07 PM
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Alright...
The actual air locker seems to have aprox .005" of wobble.
Is this close enough, or is the locker no good?
I am going to try to debur the back of the ring gear with a file as suggested by ARB.
Thanks,
Heath
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  #5  
Old January 3rd, 2006, 04:42 PM
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*UPDATE*
This was confirmed by a machine shop:
The runout on the ring gear was only approx .001"
The actual runout on the air locker was approx .007"

I got an RMA # from ARB and they were very skeptical about my claim.
They will send me one however with my credit card as security.
They are picking up the tag for 3-day air.

The guy from ARB said that this has only happened once in his experience...
(they also said only about 1 in 5 times do the bearing caps have to be ground down to clear the ARB unit)
Could that be true?
If the machine shop and I are both wrong, boy will I feel stupid.
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  #6  
Old December 4th, 2006, 07:22 PM
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Any update? :-)
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  #7  
Old January 8th, 2007, 10:50 AM
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Quote:
Originally Posted by MonLand
Any update? :-)
I experienced something very similar and it turned out that I forgot to put pressure on the bearings..... (probably what happens if you take too many breaks....) Once I realized that, the wobble almost disappeared....
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Old January 8th, 2007, 10:59 AM
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I've had to grind down the bearing caps on every ARB that I've installed. Occasionally, I've had to grind down the carrier housing as well.

jC
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  #9  
Old January 8th, 2007, 01:18 PM
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Quote:
Originally Posted by Cirbo
I've had to grind down the bearing caps on every ARB that I've installed. Occasionally, I've had to grind down the carrier housing as well.

jC
I didn't "have to" but figured that the clearance was too small (the feeler gauge would go through) to take a chance.
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  #10  
Old January 9th, 2007, 06:12 AM
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Quote:
Originally Posted by Cirbo
I've had to grind down the bearing caps on every ARB that I've installed. Occasionally, I've had to grind down the carrier housing as well.

jC
I'll second that one.

I've also seen bent bearing flanges, but only in carriers that have experienced ring gear / pinion falure
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  #11  
Old January 12th, 2007, 08:35 PM
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Posted a few pics I took during the install.
http://d90rox.kicks-ass.org:81/LockerInstall/ (or https://d90rox.kicks-ass.org/LockerInstall/ for those of you with weird Internet connections! ;-))
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