Stuffing Boxes, Shaft Seals, Bearings and Couplings . The size you need depends on the space between the shaft and the inside of the hollow packing nut. If it does, give the packing nut another half turn and check again. With your wrenches on both nuts, hold the adjusting nut and turn the locknut clockwise to release it. The one shown here is clearly starved for water and is overheating. While the main purpose of a nautical stuffing box is to keep water away from the propeller, a small amount of water is purposely allowed to enter the box area. Since the year 2000, most new boats have come equipped with shaft seals that require no packing, but inboard powered boats built before then have traditional stuffing boxes with packing. Google the Glenwood Marine catalog page 35. Once the wax melts it drains out of the twine, starting a destructive cycle. Here is a picture of one taken apart. You … strane thing happened during wed nite race before start - shut engine down - put gear in neutral - and was under main doing about 4.5kts under sail when all of a sudden the bloody shaft starts turning (note I have a martec folding prop). When I replaced mine on Julandra, I think I sold mine at a consignment store for about $20 or so. Drip-Less = A stuffing box that drips less but still needs to drip some. Documenting the refit of our 1977 Tayana 37 and getting ready for extended travel. If your stuffing box leaks more than 8 drops a minute, it needs adjusting. Let it run for two minutes to see if the box leaks. stuffing box, making certain it fits the packing space properly. In either case you must adjust the pressure against the stuffing around the prop shaft. This picture shows the wrenches I use to loosen and tighten a stuffing box. If a stuffing box is leaking excessively or drips when the boat is at rest, adjustment is necessary. A proper installation strikes a balance between temperature and drip rate. sauter.pl. A properly adjusted stuffing box will have no drips when the shaft is stopped, but 2-3 drops/minute when the shaft is turning. K. kamacdougall Kevin MacDougall. Fried stuffing balls can’t help but sound like a stoner’s delight, yet I think anyone who loves Thanksgiving flavors can and will fall in love with them, too. surface, is laid on the rings to be cut. Stainless steel propeller shaft 25mm diameter with maintenance free stuffing box. A stuffing box is a type of seal that prevents fluids from leaking inside of machine parts. When tightening the nuts, the wrenches are moved away from each other. Back this nut off a couple of turns. Tie up your boat very well at the dock and with the engine running at idle in forward gear count the drips which should be about 1 every minute. Posted by Deane Hislop | Oct 2, 2018 | Maintenance | 0 |. When adjusting the stuffing box keep in mind that; if the adjustable stuffing box nut is too tight you will burn the packing which can end up with a damaged shaft. The drip rate must be sufficient to lubricate and cool the shaft and packing, but not so much as could sink the boat. They really don't wear out. It should drip a few drops per minute when the shaft is turning, but no drips when in neutral. Repacking Procedure. Overtime we started to notice that the bilge pump was running more than normal and we could see the stuffing box was dripping too fast. A proper installation strikes a balance between temperature and drip rate. I tightened the box but it did not change. or I.D. There should be no dripping when the boat is at rest and the shaft is not spinning. Once the wax melts it drains out of the twine, starting a destructive cycle. Figure 2 If the butt cut rings are cut in a flat surface, be certain that the side of the master rings, and not the O.D. This doesn’t include butter and water, which you’ll need to make the stuffing, and olive oil, salt, and pepper, which … SD is there a correlation between tightness of stuffing box and whether the shaft spins when under sail (if tranny is in neutral). Dig out all the old packing with a thin screwdriver or a bent piece of stiff wire, but work carefully to avoid scratching the shaft. I did a 10 minute run from the yard where I worked on her to the new home port and as far as I could tell not one drip! The boat is a 1974 Ski Nautique (17'9"). Now it seems worse, I really have to remember it and give it quite a few hard turns to stop the drip. Note:I am not advocating the used of perforated hose clamps on a stuffing box. Stopfbüchse aus Messing mit Abstreifring und doppelter O-Ring-Abdichtung aus EPDM. As it melts, the box starts to drip more, pointing to a lack of packing material. Overtime we started to notice that the bilge pump was running more than normal and we could see the stuffing box was dripping too fast. Start by loosening the locknut. The conventional stuffing box’s one primary failing annoys many users to no end, so much so that several manufacturers have attempted to improve on the design. Sandy Golden. For our application, the stuffing box is where the propeller shaft enters the boat. Yep a stuffing box is packed with hemp & should drip a bit, it has to be tightened up every so often to keep the dripping in check. I have no idea the last time the packing gland was adjusted. jeanneau.com. The cooler your stuffing box runs, the longer shaft life you’ll have. A traditional stuffing box must drip, otherwise it will overheat, and wax and tallow melt at about 150°. But wait…it’s supposed to. Or maybe it somehow went out of adjustment and is getting too hot. I suspect I have to losen the stuffing box a bit. I am using regular flax packing, so I suspect I have to have some drips happening while turning the screw. It should drip a few drops per minute when the shaft is turning, but no drips when in neutral. Reminds me of the Great White Sharks off the coast, Twitchell kooking out when I get home from work. With a yacht with small shaft sizes you may have to rely on plumbing packing etc. Repeat the procedure until the stuffing box no longer leaks When the shaft is not turning and only drips a few drops when turning, and then tighten the lock nut to … stuffing box stuffing box. Boats face the challenge of remaining leak-free while spinning one or more propellers outside the hull. There have been more than a few boats sunk by improper tightening of the stuffing box nuts. Finding the right packing material is not always easy. Penetrating oils will eat engine seals and may cause catastrophic failure for the seal. Shaft has to be in good alignment and the stuffing box has to be repacked regularly and adjusted. Make sure you remove all the layers of packing. I had a stuffing box on my fishing vessel and they are good on this type of vessel where the vessel is in constant use. Any suggestions? I called the previous owner and he had not repacked it in 9 years. To see the full size images, you need to enable javascript in your browser. Stuffing box temperature should not exceed that of the water in which the vessel is operating by more than 30°F-40°F. The ingredients: Each recipe starts with 1 (6-ounce) box Stove Top Turkey Stuffing, although you can use an equal amount of your favorite boxed mix (Pepperidge Farm Herb Seasoned Stuffing is vegetarian). By Brian Gordon, Last updated 6/30/2020. Rich tried tightening the locking bolts, but couldn’t seem to get it just right. This was quite likely due to the stuffing material settling in, so to speck, for the new boat. I could drone on about what worked and what went wrong, but it’s more interesting to just watch the videos. Both of these wrenches are available at Home Depot or a hardware store. This may be all that is required, but each time the nut is tightened, it squeezes and compresses the packing further, forcing it tighter around the shaft. The lack of activity during lockown clearly did not agree with it as it was refusing to drip gently. So what’s not to like? Let it run for two minutes to see if the box leaks. This condition is with the adjusting nut backed off so I can adjust it with my hand alone. CAUTION: Some stuffing boxes are rigidly attached to the hull, but most are connected to the shaft tube with a length of flexible hose. If you are having trouble breaking the nuts apart, due to corrosion, use a little penetrating oil. Required fields are marked *, Designed by Elegant Themes | Powered by WordPress. 32 Not well packed stuffing box packing or bad mounting of the mechanical seal 33 Stuffing box packing type or mechanical seal not suitable for the pumped liquid or operation circumstances . Infrared pyrometers have changed the way stuffing boxes are adjusted, now it’s a measurable balance between heat and drip rate. He has very detailed, step-by-step instructions on how to do this. sauter.pl. You do not want to twist this hose or twist the stuffing box inside the hose. If the adjusting nut does not turn easily, use a pipe wrench on the stuffing box flange — located just forward of the hose — to keep the box from turning with the nut. For the non boaters, the stuffing box is an old low technology thing that stops water pouring into the boat from where the propeller shaft is fitted. johnson-pump.com. I had discovered the drip rate from my stuffing box with shaft stationary was around 40 drips per minute. I eventually sliced the stuffing box hose along the top from end to end after I could not even remove the bronze fitting after loosening the forward 2 hose clamps. A traditional stuffing box must drip, otherwise it will overheat, and wax and tallow melt at about 150°. Start the engine and put it in gear. Like the thread says it is a GW Morse shaft seal, NOT a conventional stuffing box. Add enough additional layers to fill the packing nut completely, and then screw it onto the threaded sleeve of the stuffing box. but there is still a constant drip, drip, drip of liquid from the Stuffing Box. The drive shaft stuffing box is dripping about 2 drips per second. johnson-pump.com . A lock nut screws around the housing and tightened against the packing nut to keep it from losing as a result of vibration. A drip every 2-3 seconds at the dock and a few drips a second underway in forward gear.
2020 stuffing box not dripping