Differential Pinion seals weeping?

[AusGreenGren]

OK Thanks for the info - will bear that in mind.
I got a response from the (Queensland Australia) dealer this morning - see below for what its worth
Might be something to check in any case -

 

[Clark Kent]

OK Thanks for the info - will bear that in mind.
I got a response from the (Queensland Australia) dealer this morning - see below for what its worth
Might be something to check in any case -


View attachment 7900352

@NQ94 contributed over in the diff breathers thread here that the diff input seal may be a cassette type. You can see in the example seal he posted there are several (5) seal lips that need to be lubricated during operation. Someone else speculated in that thread that the housing breather might maintain a low pressure to (keep water out plus) ensure some oil/mist is pushed past the seal to ensure adequate lubrication. That accords with what your agent is saying. The weeping would appear excessive if the breather is blocked or out of spec. It's a cheap low tech ball and spring device.
The problem is, how much weeping is normal for this seal type and are we accustomed to assessing leakage rates for conventional single or double lip pinion seals that run on the yoke sleeve and tend to only weep when they're starting to fail?
I'd love to hear from a Carraro rep on this, or even an experienced Iveco guy who doesn't have a brand to defend.

Edit: tipos typus typos

 

[TasRingk]

OK Thanks for the info - will bear that in mind.
I got a response from the (Queensland Australia) dealer this morning - see below for what its worth
Might be something to check in any case -


View attachment 7900352

Hi Steve,

I dropped mine off yesterday to have leaking seals looked at whilst they fixed some other warranty issues.
They replaced both pinion seals. Seems strange that back water Launceston dealer with probably <20 vehicles in total to service had them in stock and Brisbane dealer didnt!! In saying that though I had to wait 2 weeks for a thermostat to be sent from Sydney

Cheers
Chris

 

[Brandtnm]

So after having the dealer replace the front differential pinion seals mine appears to be weeping again!

Ffs!

I was under the car today changing the engine oil and saw and smelt the difference fluid in the same lower spot.

Have ragged it clean and will check it frequently and speak to the dealer again.

Note I have fitted neutral raised breathers into the engine bay for both front and rear diffs. Rear one not had a problem. Second time weeping with the front. Once with OEM breather and now again after replacing it with 8mm pipe. Makes me think this is not a pressure problem.

No water crossings or deep puddles since dealer replaced it 3 weeks back.

I look forward to seeing what you find out. I too have weeping, but not enough to cause measurable loss, or generate a drip. I bought, but have not installed, the long breathers. I have found pressure build up under the factory breathers when I checked after big altitude changes (6k’-11k’). I was hoping the pressure and weeping were related. Keep us updated please