Weird 'severe' vibration - Page 2 - SailNet Community
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post #11 of 29 Old 02-28-2011 Thread Starter
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Another question - what is this 'gland' exactly called?
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post #12 of 29 Old 02-28-2011
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The 'gland' is the component that is forced against the packing. The gland would be identified by all the components within dimension "S" on this 'large' stuffing box. http://www.pacificmarine.net/pdf%20f...%20-%20PMI.pdf
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post #13 of 29 Old 02-28-2011
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Thanks RichH for the link ....

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post #14 of 29 Old 03-01-2011 Thread Starter
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Thanks guys for the help.
I will take a photo the next time I go out to the boat for your entertainment.
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post #15 of 29 Old 03-01-2011
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Get, borrow, etc, a "dial indicator" (micrometer) and take measurement of 'shaft run-out' while (hand) rotating the shaft - with tight gland and with loose gland. Use the instrument on the shaft and also ON the stuffing box.

examples: Fowler FOW72-520-199 Dial Indicator and Magnetic Base Set - Black
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post #16 of 29 Old 03-01-2011 Thread Starter
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hand rotating?
I had to use 2 wrenches to 'loosen' it to get it to drip.
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post #17 of 29 Old 03-01-2011
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I'll bet the cutlass bearing is shot, in addition to an alignment problem.

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post #18 of 29 Old 03-01-2011
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Quote:
Originally Posted by SpcAlan1 View Post
hand rotating?
I had to use 2 wrenches to 'loosen' it to get it to drip.
He means rotating the prop shaft by hand... you're looking for 'run out' or a wobble in the shaft as it turns. You can usually grip the coupling at the back of the gearbox and get enough leverage to turn the shaft.

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post #19 of 29 Old 03-01-2011
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Quote:
Originally Posted by SlowButSteady View Post
I'll bet the cutlass bearing is shot, in addition to an alignment problem.
I suspect the same. If it wasn't the original cause, it may have been worn from the excessive vibration or misalignment.


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post #20 of 29 Old 03-01-2011
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Quote:
Originally Posted by SpcAlan1 View Post
hand rotating?
I had to use 2 wrenches to 'loosen' it to get it to drip.
Hand rotate the SHAFT when using a dial indicator.
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