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  #1  
Old 06-28-2014
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Packing gland question

Hi all.
I replaced the packing in my PSC 34 and used the special lube in it.
Getting the nut set to the right tension is proving frustrating.
With the nut set to give the target 2~3 drips/min in forward, it will drip a lot when not turning.
With the nut set to not drip when the shaft is not turning, I get no drips when in forward. Leaving it like this and doing a 1.5 hour engine run, the gland did not get hot but still no drips and it is squeeking at the end of this run when turning at ~2k/min rpm.
The difference in nut tension between the two states described is less then 1/2 a turn. Also the gland seems to drip a lot in reverse.
Should I leave it as is? Back off to get some drips and live with the leakage when the shaft is stopped? Thanks for any advise.
Regards, David
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Old 06-29-2014
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Re: Packing gland question

What was the special lube? Perhaps going back to standard would work better?

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Old 06-30-2014
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Re: Packing gland question

what did you use for packing material? Mine drips not at all when not turning and just a few drips a minute when turning. I used the Gore Tex GFO Fiber 3/16" packing.
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Old 06-30-2014
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Re: Packing gland question

Quote:
Originally Posted by dead_short View Post
With the nut set to give the target 2~3 drips/min in forward, it will drip a lot when not turning.
This seems surprising. Did you check for excessive scoring on the shaft? Is there possibly a crack or other defect on the nut? This is probably a good question to cross-post to the engine forums if you have not already.
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Old 06-30-2014
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Re: Packing gland question

As long as it's not getting hot, you're not doing any damage. I say tighten her down a bit. I have had similar issues in the past and they were due to the shaft being out of alignment. If it's not perfectly in the center of the log, it'll never work right. Make sure you're aligned and that your cutlass bearing(s) are still viable.

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Old 07-18-2014
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Re: Packing gland question

I remembered reading this post a bit ago and appreciated the information. The yard at Sail Harbor in Savannah replace my packing with the new teflon packing. On the trip down to Florida, I noticed steady dripping when running in forward and nothing when stopped. I was satisfied with the rate and figured it would improve.

I checked the drip rate the other day and found that I was not getting any drip whatsoever. I immediately felt the shaft and found it to be cool to the touch and I did not notice any unusual sounds.

Should I just be thankful or should I back off the packing nut an 1/8 of a turn and see what happens. I do not want to have the shaft scored or damaged from not having the proper amount of coolant. Thanks.
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Old 07-19-2014
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Re: Packing gland question

Be thankful. The mechanism of damage is friction which wears away at the shaft and creates a groove. No/little friction = no/little heat. I've used the teflon stuff before with no drips and had no issues. It is intrinsically a lower friction material, so it relies much less on the water for lubrication and cooling.

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