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Paint used on diff gears to check contact patch?


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#1 _Viper_

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Posted 25 December 2013 - 07:13 PM

Hey guys what's the yellow stuff called that you put on diff gears to check the tooth pattern? And who sells it?

http://www.truckinwe...t/photo_16.html

#2 N/A-PWR

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Posted 25 December 2013 - 07:14 PM

Bearing Blue



is what I've used



#3 Rockoz

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Posted 25 December 2013 - 08:01 PM

Prussian Blue is what Ive seen used for that. Its just another name.

An engineering supply company should stock it.

Its a lot like the ink out of a biro in colour and consistency


Edited by Rockoz, 25 December 2013 - 08:02 PM.


#4 _Bomber Watson_

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Posted 25 December 2013 - 08:02 PM

Yeah i use Perusian blue or bearing blue for a lot of things, good for checking contact patches or simply smeering around a face that you wish to mark accurately with a scriber.

 

Autobarn stocks it, tiny tube lasts for ages. Superjunk/ripco probably do to.

 

Cheers. 


Edited by Bomber Watson, 25 December 2013 - 08:02 PM.


#5 dattoman

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Posted 25 December 2013 - 08:21 PM

Motospecs in Pilbara St Welshpool (they are a capricorn supplier)

If the yellow marking paste is the stuff your after

9311 9950

But it aint cheap



#6 S pack

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Posted 25 December 2013 - 08:36 PM

Yellow Lead???



#7 dattoman

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Posted 25 December 2013 - 09:08 PM

Heres the Motospecs part # for you

 

0555-361681
 
 
GM
 
 
Richmond


#8 _Viper_

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Posted 26 December 2013 - 09:47 PM

Wow Thanks Niel, very helpful...

Yea I tried bearing blue/Persian blue but it didnt show up the pattern very well, First time ive done it but it certainly wasnt as clear as all the pics ive seen with the Yellow stuff.

 

WP_20131225_005_zpsff94e669.jpg

WP_20131225_006_zps50c3b10e.jpg

 

This was best guess at where the contact is? (can just see the outline in red)

red1_zps7c5729b3.jpg

red2_zpsaa2a5294.jpg

 

Ill grab some yellow stuff and see if its better. Or maybe someone has some tips on how to get a clearer reading?

 

 



#9 N/A-PWR

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Posted 26 December 2013 - 10:12 PM

that's the reading Clint, and pressure wipes the blue away better, also I think the pinion is not hard up on the pinion bearing, I could be wrong. Dave I



#10 76lxhatch

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Posted 27 December 2013 - 08:06 AM

Yeah the blue is not so easy to see but a lot cheaper. Make sure you place some load on the gears when turning, I normally just put a handle/lever of some sort against the centre to provide a bit of drag. Also maybe put it on a bit thicker to begin with

#11 _Muzzy_

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Posted 29 December 2013 - 08:14 PM

Wow Thanks Niel, very helpful...
Yea I tried bearing blue/Persian blue but it didnt show up the pattern very well, First time ive done it but it certainly wasnt as clear as all the pics ive seen with the Yellow stuff.
 
WP_20131225_005_zpsff94e669.jpg
WP_20131225_006_zps50c3b10e.jpg
 
This was best guess at where the contact is? (can just see the outline in red)
red1_zps7c5729b3.jpg
red2_zpsaa2a5294.jpg
 
Ill grab some yellow stuff and see if its better. Or maybe someone has some tips on how to get a clearer reading?


Reading the blue, you have nailed by your red out line, in saying that the diff isn't correct, I assume that's why you are marking it up

#12 _Viper_

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Posted 30 December 2013 - 10:32 AM

Yeh it was whining worse then my ex missus, on light throttle.




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