R&P: how to check? - Defender Source
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  #1  
Old December 7th, 2006, 03:16 PM
MonLand
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R&P: how to check?

If you have in front of you a ring and pinion.... How can you tell that they are in good shape to be re-installed? Actually.... Is that even possible or do you need to re-install them on the carrier/differential?
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  #2  
Old December 7th, 2006, 03:21 PM
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As long as there is no chunks missing or super obvious funky wear, you could use them. Whether they would be quiet or not, who knows until you check a pattern with them installed.
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  #3  
Old December 7th, 2006, 03:46 PM
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post a pic....
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  #4  
Old December 7th, 2006, 04:44 PM
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Here is a pic.
Seems to be in good shape.... But I honestly don't know where to look....
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  #5  
Old December 7th, 2006, 10:31 PM
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The pic would have to be much higher quality to actually check. The general rule for a rover R+P is, if it is not missing teeth, count your blessing and re-use.
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Old December 8th, 2006, 03:25 AM
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Quote:
Originally Posted by KevinNY
As long as there is no chunks missing or super obvious funky wear, you could use them. Whether they would be quiet or not, who knows until you check a pattern with them installed.
I would go with this, if they look OK, we :

'dress' them ie run a die grinder over each side of every tooth to remove high spots on both gears

assemble with original pinion height shims,

set pinion pre load,

put in diff centre, set backlash and preload

oil it and 'roll' it a few times, if it feels quiet, well done, if not blue it, check the contact patch and adjust accordingly, try adjusting a few times but if it had been running either badly set before or with worn bearings then no amount of adjustment will get it quiet and it goes in the scrap, grab a new R & P and start again,
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  #7  
Old December 8th, 2006, 09:53 AM
MonLand
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Quote:
Originally Posted by ashtrans
I would go with this, if they look OK, we :

'dress' them ie run a die grinder over each side of every tooth to remove high spots on both gears

assemble with original pinion height shims,

set pinion pre load,

put in diff centre, set backlash and preload

oil it and 'roll' it a few times, if it feels quiet, well done, if not blue it, check the contact patch and adjust accordingly, try adjusting a few times but if it had been running either badly set before or with worn bearings then no amount of adjustment will get it quiet and it goes in the scrap, grab a new R & P and start again,
I am planning on using it to setup my ARB locker before I actually dismantle the 3rd member (i.e. the truck will be useable for longer! :-) ). So, I'll also get new bearings.
Is it recommended to keep the pinion that matches with the ring? (I assume it is for even wear reasons?)
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I have an ex MoD and an ex wife. The two no longer conflict with each other.
Quote:
it is not hoarding it is selective collecting
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  #8  
Old December 8th, 2006, 09:58 AM
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"Is it recommended to keep the pinion that matches with the ring? (I assume it is for even wear reasons?)"

definatly, they are match machined, mixing is a recipe for noisy diffs,
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  #9  
Old December 8th, 2006, 03:24 PM
MonLand
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Quote:
Originally Posted by Buckon37s
The pic would have to be much higher quality to actually check. The general rule for a rover R+P is, if it is not missing teeth, count your blessing and re-use.
I posted that same picture in higher resolution at: https://d90rox.kicks-ass.org/ringand...ng%20&%20P.jpg It could use a better contrast/luminosity/.... But unfortunately, this computer has no image manipulation tool installed! :-(
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I have an ex MoD and an ex wife. The two no longer conflict with each other.
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