Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-13-2020, 11:48 PM   #1
Member
 
City: Oceanside, CA
Country: United States
Join Date: Jun 2020
Posts: 5
Packing Glands

Hello everyone. I'm new to the Trawler Forum, but a 12 year owner of a 1985 GB 42 Motoryacht, lifetime boater/sailor, located in Oceanside CA (25 miles north of San Diego), and largely a DIY'er. I've been relatively active for years on the GB Owner's Forum...but that seems to have gone dark of late.

I need help! I have not serviced my prop shaft packing glands since I bought the boat. I am ready! I've cleaned them up but have discovered they just don't slip apart...far from it. I've tried tapping on them with a block of wood and mallet - no luck. Not really budging...

Any ideas? Is there a puller designed for this? Will water start flooding the boat? I understand people do service/re-pack them while in the water.

Thanks in advance for any/all comments/suggestions. Much appreciated!

Dave
__________________
Advertisement

dstong is offline   Reply With Quote
Old 07-13-2020, 11:57 PM   #2
Member
 
City: Oceanside, CA
Country: United States
Join Date: Jun 2020
Posts: 5
Picture...

This might help = picture!
Attached Thumbnails
Click image for larger version

Name:	IMG_0906.jpg
Views:	206
Size:	114.2 KB
ID:	104962  
__________________

dstong is offline   Reply With Quote
Old 07-14-2020, 12:23 AM   #3
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 8,506
The piece nearest the prop shaft should slide towards the engine. Water will start to flow into the boat. You should have the correct size packing on hand and cut to the correct length before you start the work. You can use the exposed prop shaft to cut the packing to lenght. If it hasnít been repacked in that long it may be really hard to get it to move. I would start with something like PB Blaster for a few days prior to trying to take it apart. After spraying it in tap around the fitting to help work the Blaster into the joint.i donít know of any tool made specifically to pull this. Just keep after it with the Blaster. Maybe some heat on the rearward fitting.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is online now   Reply With Quote
Old 07-14-2020, 12:29 AM   #4
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 8,506
Oh, BTW, welcome aboard. If you donít know what the size of packing it is, get the forward fitting to slide forward and then take drill bits and see what size will fit between the shaft and the gland. I like GFO packing but there are a lot of them out there. Get everything ready before you start to pull out the old packing and then use a packing pick to screw into the old packing and carefully pull it out. There will be multiple layers of packing in there. Most have 3 or 4 layers but mine have 6. Have a few rags to stuff into the gland if something doesnít work at first. You should make sure the bilge pump works before you start...
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is online now   Reply With Quote
Old 07-14-2020, 02:40 AM   #5
Senior Member
 
City: PNW
Country: USA
Join Date: Nov 2018
Posts: 480
I'm no expert, but I wanted to mention that (unless it's a trick of the camera) that stuffing box looks fairly pink. That means de-zincification which I believe makes the bronze weak. May be worth checking into before servicing it? (Perhaps others will confirm or deny,)
Frosty is online now   Reply With Quote
Old 07-14-2020, 05:45 AM   #6
Guru
 
psneeld's Avatar
 
City: AICW
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 21,517
Good catch on the pink Frosty ......though pictures can be deceiving...... but if the boats out of the water it would be a good idea to test it.

I would just try to force a screwdriver between the two parts and lever them apart. Once it breaks loose a little bit, probably sticking from the old packing ,it should come right off
psneeld is online now   Reply With Quote
Old 07-14-2020, 09:44 AM   #7
Guru
 
HiDHo's Avatar
 
City: Scottsboro, Al.
Country: USA
Vessel Name: Hi-D-Ho
Vessel Model: 1987 Krogen Manatee
Join Date: Feb 2012
Posts: 1,194
Looks like someone tightened the gland all the way and jammed it. I would spray a good anti seize solution on it, double nut the adjustment screws and remove them. Then tap on the side screw protrusion to try to twist it loose. Tapping will let the anti seize break through the frozen gland.
HiDHo is offline   Reply With Quote
Old 07-14-2020, 01:00 PM   #8
Member
 
City: Oceanside, CA
Country: United States
Join Date: Jun 2020
Posts: 5
Thanks everyone - lots of good info/ideas/suggestions. Another related question...

As you can see I disconnected the raw water supply hose from the elbow on top of the gland. A mechanic told me that the water should be flooding out of it at high pressure...it's not. Water comes out - would probably fill a glass of water in about 10 seconds, but not high pressure and not going to sink my boat. I removed the elbow as well, same thing...I can see the shaft, it looks clean and no apparent blockage. Same for both port and starboard glands.

Is this a sign that something is wrong/restricting flow? Or, is the mechanic wrong and water should not be high pressure/heavy flow from that opening?
FYI - my glands do drip both in the slip and (more) underway.

Thanks again!

Dave
dstong is offline   Reply With Quote
Old 07-14-2020, 01:22 PM   #9
Guru
 
psneeld's Avatar
 
City: AICW
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 21,517
No... not high pressure necessarily....but it depends on how deep your shaft is. Either way, a modest flow is probably good enough.
psneeld is online now   Reply With Quote
Old 07-14-2020, 02:10 PM   #10
Guru
 
mvweebles's Avatar
 
City: Saint Petersburg
Country: United States
Vessel Name: Weebles
Vessel Model: 1970 Willard 36 Trawler
Join Date: Mar 2019
Posts: 1,119
I agree with psneeld - you should see flow, but not a geyser. A cup in 10-seconds is fine. All a function of how far below waterline the outlet is. On a GB, probably 24-inches, tops.

I zoomed-in on the OPs picture. I assume that where I've shown the dashed red line is where the 'pusher' meets the housing ('pusher' being the part that descends when bolts are tightened). If so, I'd put PB Blaster along the dashed red-line; and then take a block of wood and a mallet and give firm taps on the ears, where the white circles are; one and then the other to 'rock' the pusher. Keep tapping for a while - it will hopefully eventually give way. If you have a large screwdriver with a broad enough tip, you may be able to insert and twist it to spread the pieces apart.

Good luck!

Peter
Click image for larger version

Name:	GB42 Stuffing Box.jpg
Views:	35
Size:	91.0 KB
ID:	104972
__________________
M/V Weebles
1970 Willard 36 Sedan Trawler
Current Location: Ensenada MX
mvweebles is online now   Reply With Quote
Old 07-14-2020, 02:20 PM   #11
Guru
 
High Wire's Avatar
 
City: Cape May, NJ and Englewood, FL
Country: USA
Vessel Name: Irish Lady
Join Date: Dec 2007
Posts: 3,327
On a job like this always plan for the worst. What if you can’t get the new packing back in? Bilge pumps all good? Something to stop the leak like duct seal or bees wax? Have the right size and quantity packing? Have an extra ring?
__________________
Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in New Jersey.
High Wire is offline   Reply With Quote
Old 07-14-2020, 02:27 PM   #12
Guru
 
alormaria's Avatar
 
City: Trenton
Country: USA
Join Date: Apr 2012
Posts: 1,221
Are you sure you want to start on this voyage of discovery while in the water? Nothing like a fountain of water spurting up to between your legs to help one contemplate how the machinery got in this predicament. Good advice on having the new packing cut and ready to go but how did you know what size to buy since you've never seen the inside of the gland? What if you're wrong?



Why not just drive it this year and put the new packing in over winter haulout. When you and it will be dry. And the marine store is open.
__________________
Al Johnson
34' Marine Trader
"Angelina"
alormaria is offline   Reply With Quote
Old 07-14-2020, 03:10 PM   #13
Guru
 
Lepke's Avatar
 
City: Between Oregon and Alaska
Country: US
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 1,911
The elbow with the plug on the top of the gland is for water. Usually some of the exhaust water is plumbed to the fitting to ensure a flow of water to the stern bearing. It also helps keep the grooves in the stern bearing free of buildup.
I always change the packing in the water since the final adjustment is done there anyway. Not that much water comes in, it would take days to sink your boat.
There's probably a spot on the housing for a grease fitting. If waterproof grease is pumped in, water pressure keeps it up against the packing. Any leak forces the grease into the packing, lubing the shaft and stopping leaks. It stops wear on the shaft, allows the shaft to turn easier without leaks, and may save a minor amount of fuel.
Lepke is offline   Reply With Quote
Old 07-14-2020, 04:20 PM   #14
Member
 
City: Oceanside, CA
Country: United States
Join Date: Jun 2020
Posts: 5
Thanks again everybody!

Red line and white circles are spot on...thank you again! Will work on loosening things up. The gap is a little large for the screwdriver plan, but I will come up with something else.

Winter haul out? What's that??? Just kidding...but in SoCal we boat year round...haul out once every 3-5 years for bottom paint mostly. So kind of need to address while in the water...but being prepared for the worst is an excellent idea.

No grease fittings...I've seen those on a charter many years ago - but mine don't have them.

Will update when I have news. Thanks again...

Dave
dstong is offline   Reply With Quote
Old 07-14-2020, 05:31 PM   #15
Veteran Member
 
Southern Boater's Avatar
 
City: Tasmania
Country: Australia
Vessel Model: Sea Ranger 46
Join Date: Sep 2019
Posts: 93
Quote:
Originally Posted by alormaria View Post
Are you sure you want to start on this voyage of discovery while in the water? Nothing like a fountain of water spurting up to between your legs to help one contemplate how the machinery got in this predicament. Good advice on having the new packing cut and ready to go but how did you know what size to buy since you've never seen the inside of the gland? What if you're wrong?



Why not just drive it this year and put the new packing in over winter haulout. When you and it will be dry. And the marine store is open.
I agree, thereís something about experimenting with below waterline fittings without a proven functioning seacock/valve that makes me a bit apprehensive
Southern Boater is offline   Reply With Quote
Old 07-14-2020, 06:05 PM   #16
Guru
 
mvweebles's Avatar
 
City: Saint Petersburg
Country: United States
Vessel Name: Weebles
Vessel Model: 1970 Willard 36 Trawler
Join Date: Mar 2019
Posts: 1,119
Quote:
Originally Posted by dstong View Post
Thanks again everybody!

Red line and white circles are spot on...thank you again! Will work on loosening things up. The gap is a little large for the screwdriver plan, but I will come up with something else.

Winter haul out? What's that??? Just kidding...but in SoCal we boat year round...haul out once every 3-5 years for bottom paint mostly. So kind of need to address while in the water...but being prepared for the worst is an excellent idea.

No grease fittings...I've seen those on a charter many years ago - but mine don't have them.

Will update when I have news. Thanks again...

Dave
If gap is too big for screwdriver, try a shim of some sort to reduce the gap.

The biggest risk is ripping the hose that connects the stuffing box to stern tube. Those hoses are usually pretty tough, but pay attention. If it's in decent shape, I wouldn't hesitate to work on the stuffing box. Not a lot of water comes in if you have an issue. A t-shirt stuffed in will abate. Flow from your water injection is worst case flow, and you've already said it isn't much.

Good luck and please update. First time I did a stuffing box in water I was terrified.
__________________
M/V Weebles
1970 Willard 36 Sedan Trawler
Current Location: Ensenada MX
mvweebles is online now   Reply With Quote
Old 07-14-2020, 08:44 PM   #17
Guru
 
City: Rochester, NY
Country: USA
Vessel Name: Hour Glass
Vessel Model: Chris Craft Catalina 381
Join Date: Aug 2019
Posts: 1,854
I'll agree. Working bilge pumps and something to block the flow if needed and it's not a big deal to do in water. The first time I opened up a stuffing box on my boat in the water my reaction was pretty much "that's it?" at the couple gallons a minute coming in under not much pressure.
rslifkin is online now   Reply With Quote
Old 07-14-2020, 08:47 PM   #18
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 8,506
I seriously doubt that I would try to do mine in the water since it is difficult to get to and I donít fit in there well. I repacked my port side this winter while I had the engine and transmission out. Then it was easy to get to.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is online now   Reply With Quote
Old 07-14-2020, 11:47 PM   #19
Member
 
City: Oceanside, CA
Country: United States
Join Date: Jun 2020
Posts: 5
So, I successfully separated both packing glands tonight! Some rope/line, a crowbar, some muscle and leverage did the trick...

So time to clean up the parts some more, remove the old packing, install the new packing, and reassemble. But...questions:

With the glands apart no great flow of water occurred. The same dripping - about 1 drop every 5 seconds on one, and about 1 drop every 30 seconds on the other. How much water do we think will come out once I remove the old packing material? Will it be hard to push the new pre-cut packing material in place? The old/current packing material seems to be about 1/4 of an inch to 3/8 of an inch in from the opening - does that sound about right?

Big question - you will notice in one picture that the starboard gland has a broken stud. Needs to be replaced. Will it simply or otherwise come out? Just unscrew it? Heat it up? I don't see threads at the point it enters the gland...but maybe they are there?

Well, that's enough for tonight. I can't thank everyone enough for all of your help.

Dave
Attached Thumbnails
Click image for larger version

Name:	IMG_0913.jpg
Views:	54
Size:	123.0 KB
ID:	105023   Click image for larger version

Name:	IMG_0912.jpg
Views:	47
Size:	123.0 KB
ID:	105024  
dstong is offline   Reply With Quote
Old 07-15-2020, 12:14 AM   #20
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 8,506
Quote:
Originally Posted by dstong View Post
So, I successfully separated both packing glands tonight! Some rope/line, a crowbar, some muscle and leverage did the trick...

So time to clean up the parts some more, remove the old packing, install the new packing, and reassemble. But...questions:

With the glands apart no great flow of water occurred. The same dripping - about 1 drop every 5 seconds on one, and about 1 drop every 30 seconds on the other. How much water do we think will come out once I remove the old packing material? Will it be hard to push the new pre-cut packing material in place? The old/current packing material seems to be about 1/4 of an inch to 3/8 of an inch in from the opening - does that sound about right?

Big question - you will notice in one picture that the starboard gland has a broken stud. Needs to be replaced. Will it simply or otherwise come out? Just unscrew it? Heat it up? I don't see threads at the point it enters the gland...but maybe they are there?

Well, that's enough for tonight. I can't thank everyone enough for all of your help.

Dave

No the current packing will stop the water flow until you disturb it because it is still packed pretty tightly. I took a piece of PVC piping with the same ID as the diameter of the shaft and cut it into 2 pieces lengthwise. I use it to push the new packing into the gland so it goes in evenly. You need to stagger the cuts in the packing so they donít line up. The new packing will go in easily with the PVC to push it. You absolutely need to make sure you get the correct size packing, too big and it wonít go in, too small it will never tighten up and keep the water out. Now that you have the inside end off get a set of drill bits and see which one fits tightly and that is the size of the packing you need. It must be the right size. You will get a flow of water when you start getting to the last layer of packing and even more when it is all out. Just be prepared and have everything you will need at hand and donít panic. Be methodical and plan it all out in your mind before you start. Have some rags to stuff in and duct tape on hand.

As to the broken stud, good luck. It is a case of finding the correct method of getting out. Maybe PB Blaster or the like, start now dosing it periodically. Maybe heat. Maybe double nut if you can get a nut on the stud, hopefully when you got the old nut off it chased the threads for you. Maybe a combination of all the above along with periodically.tapping to help work the lubricant into the threads on the rear piece of the gland. Maybe it will just back out with vice grips but I wouldnít go there first because it will screw up the threads.
__________________

__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 08:49 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×