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post #1 of 7 Old 12-12-2012 Thread Starter
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Hurth Tranny ?

Any body know where and why a Hurth tranny leaks fluid? I can't see the bottom of the case. Anybody have a diagram or schematic?


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post #2 of 7 Old 12-12-2012
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Re: Hurth Tranny ?

If over filled they can leak out of the vent hole in the fill cap. If you have a leaking rear seal that is another option for a leak and one of the most common, especially when people get penetrating oil on the seal.... This can also be caused by rust working its way into the seal from the metal output shaft and ruining it. The shifter seal is also another possibility..

You need to thoroughly clean the gear then touch with clean white rags to it to find where you are seeing pink on the rag..

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post #3 of 7 Old 12-13-2012 Thread Starter
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Re: Hurth Tranny ?

Thanks Mainsail,

Middle of passage in the Mallaca Straits, had to catch the outgoing tide yesterday AM. Now in Langkawi, can take a better look manana, it's one of those upside down, mirror on a stick, take a look see, kinda problems... Like the clean rag idea, gonna have to sacrifice a White T-shirt to the Hurth god.

Have had excellent service from this gear box. Turning 20 years old in January with 4300 hrs, never used a drop before, always regular service, used the same measuring jug, flushed every once in awhile, so maybe a seal or two?

Cheers!


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post #4 of 7 Old 12-15-2012
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Re: Hurth Tranny ?

This may help: http://c34.org/manuals/ZF_Hurth_Repair_manual.pdf

Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)
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post #5 of 7 Old 12-15-2012
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Re: Hurth Tranny ?

Quote:
Originally Posted by aeventyr60 View Post
Thanks Mainsail,

(snip)can take a better look manana, it's one of those upside down, mirror on a stick, take a look see, kinda problems...
I find myself using my cell phone more and more to take shots of equipment with minimal clearance, bad angles, etc.

Good luck with your search!

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post #6 of 7 Old 12-16-2012
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Re: Hurth Tranny ?

I just rebuilt mine last winter due to a leak.

(Can't find the link right now, have to go.)

regards,
Brad
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post #7 of 7 Old 12-18-2012
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Re: Hurth Tranny ?

aev :

Watch for a wee line of barely-visible rust pits immediately below the lip seal.
They are not easy to see, and the seal cannot live with them.... it leaks, and leaks.
I speak from experience with a Volvo gearbox.
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