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Old 20-02-2015, 04:40   #1
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Angry Old Hurth HBW20 ???

My Hurth gearbox HBW20 has developed a significant oil leak It APPEARS to be exiting through the gear change shaft seal on the side. One mechanic stated this required removal and a COMPLETE strip down in order to replace the seal, though not sure he actually wanted the work, so not sure.

Any views on this? If its true, then I'm guessing it would be far simpler just to look for a replacement unit.

I'm using Dextron/ATF. Wondering if that's ok on such an elderly unit, though don't know what else I'd use?

Any advice appreciated please
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Old 20-02-2015, 04:55   #2
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Re: Old Hurth HBW20 ???

Quote:
Originally Posted by dougal View Post
My Hurth gearbox HBW20 has developed a significant oil leak It APPEARS to be exiting through the gear change shaft seal on the side. One mechanic stated this required removal and a COMPLETE strip down in order to replace the seal, though not sure he actually wanted the work, so not sure.

Any views on this? If its true, then I'm guessing it would be far simpler just to look for a replacement unit.

I'm using Dextron/ATF. Wondering if that's ok on such an elderly unit, though don't know what else I'd use?

Any advice appreciated please
Is this what your tranny looks like???

If so, your mechanic is full of shiznit... Looks like the shift plate housing simply unbolts from the case... If it takes more than 15 min to extract it, somebody is slacking...
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Old 20-02-2015, 05:03   #3
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Re: Old Hurth HBW20 ???

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Originally Posted by HappyMdRSailor View Post
Is this what your tranny looks like???

If so, your mechanic is full of shiznit... Looks like the shift plate housing simply unbolts from the case... If it takes more than 15 min to extract it, somebody is slacking...
Yes that is indeed the wee baby in question. The mechanic in question, is without doubt a very highly qualified 'gentleman'. I suspect he simply didn't want to work on such an old and delapidated vessel (and then there's the boat)

Looks to me, that how ever akward to get at, its fixable 'in situ'.
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Old 20-02-2015, 11:52   #4
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Re: Old Hurth HBW20 ???

I have two of the HBW series mine are the 450, I've found that using synthetic ATF helps the units run cooler which makes them last longer. Mine hold 1.9 quarts and using synthetic is like having a extra quart or so of oil in the sump because of the lower operating temps.


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Old 22-02-2015, 07:56   #5
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Re: Old Hurth HBW20 ???

Quote:
Originally Posted by dougal View Post
Yes that is indeed the wee baby in question. The mechanic in question, is without doubt a very highly qualified 'gentleman'. I suspect he simply didn't want to work on such an old and delapidated vessel (and then there's the boat)

Looks to me, that how ever akward to get at, its fixable 'in situ'.
I suspect you're right... No wantee workee...

Should be fairly simple... In situ... remove the shift lever, remove the 4 bolts holding the housing plate around the shaft, replace the seal/bushing/whatever in the housing, and bolt it back on...
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Old 22-02-2015, 10:09   #6
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Re: Old Hurth HBW20 ???

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Originally Posted by HappyMdRSailor View Post
I suspect you're right... No wantee workee...

Should be fairly simple... In situ... remove the shift lever, remove the 4 bolts holding the housing plate around the shaft, replace the seal/bushing/whatever in the housing, and bolt it back on...
All I have to do now is FIND a seal;-)
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