stuffing box drip rate

A second ring of conventional packing completes the job. The gland nut allows the packing material to be compressed to form a watertight seal and prevent water leaking up the shaft when the tap is turned on. © 2020 Boat Owners Association of The United States. If you cannot make this adjustment without putting body parts or clothing in dangerous proximity to the spinning shaft, stop the engine, make the adjustment, then restart it to check the drips. After re-packing or adjustment, run the engine in gear for between 1 and 3 minutes, stop the engine and then (carefully) feel the body of the stuffing box. drip rate seems about 1-3 per minute. You can use pipe wrenches to turn the nuts, but adjustable packing nut wrenches tend to be easier to handle in confined spaces. Other types of sealed connections without moving parts are also sometimes called glands; for example, a cable gland or fitting that connects a flexible electrical conduit to an enclosure, machine or bulkhead facilitates assembly and prevents liquid or gas ingress. Ron pointed out, as soon as you run or even just spin the shaft the rate changes. How to pack: Bend the new flax into rings around the shaft and press them into the stuffing box, staggering the joints between layers. Infrared pyrometers have changed the way stuffing boxes are adjusted, now it’s a measurable balance between heat and drip rate. This photo shows three rings installed. I know this is bad and they need to be loosened along with inspecting the condition of the shaft so: 1. December 4, 2008. Stuffing boxes are also used to seal rudder stocks that penetrate the hull below the waterline. Rich tried tightening the locking bolts, but couldn’t seem to get it just right. A sound stuffing box installation is critical to safety because failure can admit a catastrophic volume of water into the boat. Service Your Stuffing Box. Now turn the adjusting nut clockwise until the dripping just stops. I guess rather less when the shaft is stopped. CAUTION: Some stuffing boxes are rigidly attached to the hull, but most are connected to the shaft tube with a length of flexible hose. When adjusting other types of flax the stuffing box should be relatively cool/warmish to luke warm, at most. Retighten the packing nut to compress the flax around the shaft and slow the water drip rate. After you make this initial adjustment, you are going to need to check the drip rate with the shaft turning. Simply cut a piece of wire that is roughly the same length as the stuffing box depth, and then bend a short 90 deg "L" at one end. It drips about 1 drip every two or three seconds while not running. This doesn't harm the shaft or the stuffing box, but the spinning shaft will sling this excess flow all over the engine … If it is hot to the touch it is too tight. You can make the task less frantic by sealing the shaft from the outside with plumbers putty, but you will have to go into the water twice to do this, once to put the putty around the shaft, and a second time to remove it. If it is more than two, tighten the adjusting nut slightly. This nut fits three, some don't and it's not a huge deal if one does not fit more than two. I can't get enough leverage to move them. Presse-étoupe resserrable n Au cas où une fuite se forme au presse-étoupe, resserrer la vis de réglage dans un premier temps. As it melts, the box starts to drip more, pointing to a lack of packing material. Because you remove the old packing before installing new, and it is the packing that is keeping the ocean out of your boat, it should be out of the water when you do this job. Packing installed this way will not seal properly. This requires cutting the packing into lengths that just encircle the shaft with ends touching. Hold the adjusting nut securely so that you do not alter the setting, then tighten the locknut against it. Don s/v Tellico. The advantage of this type of packing is that it is self lubricating, which eliminates the necessity of letting the stuffing box drip. I am guessing that our drip rate is excessive and probably indicates a need to replace, but was looking for some guidance. The packing nut never drips. My stuffing box nuts are jambed tight. The stuffing box prevents sea water from entering the boat's hull. Do not turn the shaft while the putty is in place or you will break its seal, and make sure you clean out ALL the putty when you are finished since both the stern bearing and the shaft seal depend on water flow for lubrication. 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. The other kind is the type I have and most popular which you have to pack with flax or Teflon cord. If your stuffing box leaks more than 8 or 10 drops a minute, it needs servicing. If the box is corroded, back off the adjusting nut several turns and wire brush the box threads bright before making the adjustment. It is not uncommon to see stuffing boxes leak at a much higher rate. 1911tex Sustaining Member. Tighten the nut just enough to stop the box from dripping. A stuffing box of a sailing boat will have a stern tube that is slightly bigger than the prop shaft. Do not run the pump blocked tight. The packing is inside the gland nut and creates the seal. A properly adjusted stuffing box will have no drips when the shaft is stopped, but 2-3 drops/minute when the shaft is turning. 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. https://catalog.hydrasearchrecreational.com/category/packing-boxes-1, Servicing Your Stuffing Box, by Don Casey, Step-by-Step Instructions For Servicing Your Stuffing Box, by Capt. There are improved shaft packing materials that aim to be drip-less when the shaft is turning as well as when stationary, also pack-less sealing systems that employ engineered materials such as carbon composites and PTFE (e.g. The one shown here is clearly starved for water and is overheating. The shaft is wrapped by the packing and put in the gland nut. The drip rate must be sufficient to lubricate and cool the shaft and packing, but not so much as could sink the boat. A traditional variety of shaft packing comprises a square cross-section rope made of flax impregnated with wax and lubricants. It will also have packing nut threads or a gland nut. You install a ring of conventional packing, then push Dripless Packing into the box until it is about three-quarters full. Don Casey has been one of the most consulted experts on boat care and upgrades for 30 years, and is one of the BoatUS Magazine's panel of experts. Through tightening it onto the stern tube, the packing is compressed, creating a seal against the shaft. The drip less kind which you can identify by seeing something like a 3/8" hose attached to a nipple on the stuffing box. The gland at the rotating shaft of a centrifugal pump may be packed in a similar way and graphite grease used to accommodate continuous operation. With the help of a flashlight — and a mirror if you need one — count the drops per minute. When this happens, the pump will need to be rebuilt, replacing at least the stuffing box and shaft. Proper compression allows about two drops per minute. 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 hold in place. Stuffing box components are of stainless steel, brass or other application-specific materials.[3]. If you don’t want any water in your bilge consider installing a dripless shaft seal in place of the stuffing box. Latest. In a common type of stuffing box, rings of braided fiber, known as shaft packing or gland packing, form a seal between the shaft and the stuffing box. Over time, operators will adjust the gland follower to maintain this drip rate. It is not uncommon to see stuffing boxes leak at a much higher rate. Tamp it evenly with a small dowel or a blunt screwdriver to push it all the way to the bottom of the box. At rest should not drip at all; while motoring a drip or two every minutes. The "box" is a cylindrical assembly, typically of bronze, comprising a sleeve threaded on one end to accept adjusting and locking nuts. This type of packing runs hotter than water-lubricated flax, and over tightening will generate excessive heat. Sailing Totem: Bringing Holiday Spirit Cruising. Learn More. Operators should adjust their stuffing boxes periodically, by tightening or loosening the gland, to maintain a sealing water “drip rate” out of the back of the stuffing box. Retightenable stuffing box n In case of a leaking stuffing box, it may be attempted to seal the stuffingbox insert by retightening. Even more disastrous, it puts an unattended boat at risk of sinking. Charter Provisioning in the Covid-19 Era. The easiest way to do this is with a corkscrew-like pick designed specifically for this task, but a sharpened piece of stiff wire bent 90 degrees at the end will also do the job. Oct 28, 2020 #4 Hagar2sail said: Interesting. This will allow the longest run-time possible before needing adjustment again. When under way the drip increases a little. I am pushing both wrenches downward to loosen them. #: 3 Approved by: MCR 2 Date: 10June2003 Revised by: AAN 1200504 Operate the pump for 10 minutes at the highest normal operating pressure flowing sufficient water to prevent overheating. On a boat having an inboard motor that turns a shaft attached to an external propeller, the shaft passes through a stuffing box, also called a "packing box"[4] or "stern gland" in this application. Subscription to the print version of BoatUS Magazine, 4% back on purchases from West Marine stores or online at WestMarine.com, Discounts on fuel, transient slips, repairs and more at over 1,200 businesses, Deals on cruises, charters, car rentals, hotel stays and more…. The most common example is in the head of a tap (faucet) where the gland is usually packed with string which has been soaked in tallow or similar grease. [2] Creating a proper plunger alignment is critical for correct flow and a long wear life. Packing that is adjusted too loose can allow air to be sucked in through the packing during priming, reducing the height that at which the pump can be primed. Drip-Less packing requires two retainer rings of conventional packing. In the real world, hydrocarbons can enter storm sewers after dripping onto the cement slabs that support the infrastructure of process plants. If your stuffing box leaks more than 8 drops a minute, it needs adjusting. Charter . If you must do it with the boat afloat, have the new packing ready to install as soon as the old is out, and drape a towel over the stuffing box to deflect the incoming flood into the bilge, where your bilge pump should handle it without difficulty. You will need to check this setting after the first couple of hours of use; some tightening is usually required. von-rohr.ch . Slacken the compression nut and re-test until the drip rate and temperature are correct. Repacking is straightforward. With GFO they claim temps up to the 125-130F range are technically safe for the packing. It is vital that the stuffing box does not overheat, since this will cause scoring damage to the shaft. When the drip rate is one or two drops per minute, stop the engine. You must dig out ALL of the old packing. With traditional flax packing it should drip and must drip while the shaft is spinning. Its primary components are a threaded sleeve and a hollow nut through which the shaft passes. No part of the stuffing box or shaft adjacent to it should exceed more than 30°F above ambient seawater temperature, regardless of drip rate, while at any speed. After the packing nut has been tightened a few times, the packing gets so compressed that it becomes hard enough to actually wear a groove in the shaft — a condition you want to avoid. Vincent Daniello, August 16, 2012, https://en.wikipedia.org/w/index.php?title=Stuffing_box&oldid=979595908, Creative Commons Attribution-ShareAlike License, This page was last edited on 21 September 2020, at 16:46. This doesn't harm the shaft or the stuffing box, but the spinning shaft will sling this excess flow all over the engine compartment, leading to rampant corrosion of the shaft coupling, the transmission housing, and everything else getting sprayed. The sleeve — or sometimes the nut — is filled with rings of braided square flax rope that has been heavily impregnated with wax and lubricants. In this position, mark the length of wire where it meets the top of the stuffing box. You can do this either with the boat underway or with the transmission engaged in forward and the boat securely tied in the slip. We use cookies to enhance your visit to our website and to improve your experience. A traditional variety of shaft packing comprises a square cross-section rope made of flax or hemp impregnated with wax and lubricants. A stuffing box is an assembly which is used to house a gland seal. This is normal procedure. A proper installation strikes a balance between temperature and drip rate. Hold the packing nut while you release the lock nut, then unscrew the adjusting nut completely to open the box. A turn of the adjusting nut compresses the shaft packing. Centurion stuffing box around the shaft is dripping too much. [1] It is used to prevent leakage of fluid, such as water or steam, between sliding or turning parts of machine elements. But this one is dripping constantly. 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. Destinations. Water is required to lubricate conventional packing, so a properly adjusted stuffing box can be watertight when the shaft is stopped, but it must drip when the shaft is turning. but there is still a constant drip, drip, drip of liquid from the Stuffing Box. von-rohr.ch. If you don't seem to have room for the fourth layer, hand tighten the adjusting nut to force the other rings deeper, then remove it again to see if this made room for an additional ring of flax. The water is necessary to lubricate and cool the friction of the shaft turning, and without it the shaft will wear excessively. Tightening the stuffing box nut a half turn is all that is required to reduce the leak, but the location of the stuffing box can render this job far more difficult than it should be. A stuffing box is an assembly which is used to house a gland seal. If a stuffing box is allowed to drip it allows for excellent cooling, longer shaft life, less opportunity for crevice corrosion and less opportunity for trapped air to run the box totally dry and cook it. I have been getting water in the bilge lately and in looking for the leak found the stuffing box leaking. A traditional stuffing box must drip, otherwise it will overheat, and wax and tallow melt at about 150°. The stuffing box should not be too hot to touch. If the stuffing box is above a deep bilge, tie a retaining line to the wrenches before you start. Two or three drops per minute are adequate. When adjusting the packing drip rate, follow the packing adjustment instructions, 1200504, to adjust as close to the 5 drips per minute as practical. More How To. In many small fiberglass boats, for example, the stuffing box is mounted inboard near the point the shaft exits the hull. Any tricks for loosening the jambed packing nuts? Low-friction packing is six to ten times more expensive than flax, but because it rarely needs adjustment, it can be a good choice for a stuffing box that is particularly difficult to service. von-rohr.ch. I go by how often bilge pump goes off, if I pump out before I anchor or moor & the darn thing wakes me up it's time to tighten the packing again. Do this one clamp at a time. Teflon). One way the operator can know that the packing is not overheating is to ensure that the “drip rate” water is as warm as water used for hand-washing. The normal drip rate may vary between 5 and 60 drops per minute. *****CLICK BELOW FOR PAGE 3***** 17-DEC-2010. It is not uncommon to see stuffing boxes leak at a much higher rate. In a powerboat used regularly, the shaft packing should be replaced at least every other year. The drip rate must be at once sufficient to lubricate and cool the shaft and packing, but not so much as could sink an unattended boat. New Charter Vacation Routines. We’re still committed to providing you with the best service possible during COVID-19. Lower … Give threads and nuts a heavy coat of Boeshield T-9 (or some other corrosion blocker) to avoid this problem in the future. Three Rings Installed . A turn of the adjusting nut compresses the shaft packing. Better yet, release each one and rotate it to view all sides before retightening. Check your stuffing box regularly and provide it with the care it needs. Joined 7 Apr 2005 Messages 54. The easy way to do this is to wrap the packing around the shaft in some accessible location and cut across the overlap with a razor knife. Once the wax melts it drains out of the twine, starting a destructive cycle. This shaft had roughly .05" of stuffing box wear and was deemed "scrap metal" by the shafting shop. The stern gland or stuffing box as it is sometimes refered to is a much maligned piece of an inboard boats drivetrain. von-rohr.ch. Maintain this gland around the prop shaft to keep leaks at bay. An alternative to conventional braided packing is Drip-Less moldable packing. The linear seal around the piston rod of a double acting steam piston is also known as a gland, particularly in marine applications. If it does, give the packing nut another half turn and check again. In fact, with access to an infrared pyrometer, drip rates are much less important than they once were. Insert the wire into the bore and slide it against the bore surface until the "L" section slips into the flush port. The drip rate must be at once sufficient to lubricate and cool the shaft and packing, but not so much as could sink an unattended boat. Feb 15, 2004 735 Hunter 37.5 Balt/Annapolis/New Bern Mar 18, 2006 #4 Also depends on the packing … Up here in Maine water is usually around 50ish-60ish in the summer depending on where you are, so I would think that is about the environment the box is seeing. That hose supplies raw water to keep the shaft cool. Back this nut off a couple of turns. Measure the drip rate from the stuffing box in drips per minute and record that as well. Ideally, the compression is just enough to make the seal both watertight when the shaft is stationary and drip slightly when the shaft is turning. As Capt. Two or three drops per minute are adequate. When the box is full — but not so full that the adjusting nut doesn't thread on easily — adjust it to drip two or three times per minute, as previously outlined. In my opinion & experience monitoring stuffing box temps over a … Take care not to scratch the shaft with either tool. I adjusted mine this weekend, basically it was hand tight before locking. Water is required to lubricate conventional packing, so a properly adjusted stuffing box can be watertight when the shaft is stopped, but it must drip when the shaft is turning. I acquired the boat in this condition 2-1/2 years ago. Marine-duty hose clamps secure the hose to the stern tube and the aft portion of the stuffing box sleeve. Two or three drops per minute are adequate. Water is required to lubricate conventional packing, so a properly adjusted stuffing box can be watertight when the shaft is stopped, but it must drip when the shaft is turning. People. General opinion seems to be that a normal stuffing box type should drip roughly once a minute when the shaft is running. Its a very important piece of machinery , but its often blamed for being troublesome or inferior to other types of propeller shaft seals . Repacking Procedure. The 60 drips per minute is a little more forgiving than the five drips per minute but should still be used as a limit for a maximum drip rate to be allowed. Again, a stuffing box should drip at a regular, albeit slow rate of between two and six drops a minute with the shaft turning. A gland is a general type of stuffing box, used to seal a rotating or reciprocating shaft against a fluid. Tightening the nut compresses this packing against the shaft, forming a watertight seal while still allowing the shaft to turn. Multiply the diameter of your shaft by 14 to get the approximate number of inches you need for 4 layers of new packing — usually sufficient. A special purpose heavy-duty rubber hose attaches the stuffing box to a stern tube, also called a shaft log, that projects inward from the hull. The cooler your stuffing box runs, the longer shaft life you’ll have. In a common type of stuffing box, rings of braided fiber, known as shaft packing or gland packing, form a seal between the shaft and the stuffing box. ARC 2020 is Underway. His books include Don Casey's Complete Illustrated Sailboat Maintenance Manual, and the recently updated This Old Boat, the bible for do-it-yourself boaters. Likewise the shaft of a handpump or wind pump is sealed with a gland where the shaft exits the borehole. With your wrenches on both nuts, hold the adjusting nut and turn the locknut clockwise to release it. If the old packing comes out relatively intact, use it to determine what size packing you need. Little details like this make for an easily adjusted stuffing box with a correct drip to temp ratio. By continuing to use our website, you’re agreeing to our cookie policy. It should drip a few drops per minute when the shaft is turning, but no drips when in neutral. Curl one of your cut lengths into a ring around the shaft and push it into the stuffing box. If it comes out as shapeless wads of fluff, then measure the space between the shaft and the inside of the packing nut to determine the correct flax size. Sailboats may not need to have the packing replaced for five years or more, but when the stuffing box starts requiring frequent adjustment or if it begins to feel warm, it's time. Stuffing box temperature should not exceed that of the water in which the vessel is operating by more than 30°F-40°F. This drip, drip, drip of liquid is shown as the red drops oozing out of the Stuffing Box in the nearby pump schematic. A common mistake is winding the new packing around the shaft as a continuous piece. From "Hands-On Sailor" in our January 2008 issue. You do not want to twist this hose or twist the stuffing box inside the hose. If your boat has inboard power, odds are it is fitted with a stuffing box to provide a watertight seal for the propeller shaft. By Steve D Antonio. There is no reason why a well installed well greased stern glad should leak at … 11 Apr 2005 #3 Y. yachtie8 New member. It must instead be installed as a series of stacked rings. Signs that the packing is failing and needs to be replaced are now easier to identify and can include any of the following: 13-JUL-2010.05" Of Wear. Add a third layer, then a fourth, each time staggering the joint. Before you extract yourself from your access position, carefully check the strap clamps that attach the hose to the stuffing box and to the stern tube. In a steam engine, where the piston rod reciprocates through the cylinder cover, a stuffing box provided in the cylinder cover prevents the leakage of steam from the cylinder. He and his wife cruise aboard their 30-footer part of the year in the eastern Caribbean. In principle a stuffing box is identical to the packing nut on a common faucet. Prepared by: TED Rev. Push a second ring into the stuffing box on top of the first one, staggering the joint about 120 degrees. Charter. The first step in stuffing box adjustment, then, is to figure out how to get two wrenches on the box--one for the lock nut and one for the adjusting nut — and how to position yourself so that you can pull on one while pushing on the other, and vice versa. Access can be especially challenging in boats with V-drives and in sailboats. These inevitably corrode at the bottom, so you may need a mirror to check them. See first picture which shows a nipple for the hose connection. Your cut lengths into a ring around the piston rod of a sailing boat have. Water into the boat underway or with the transmission engaged in forward and the.. Two retainer rings of conventional packing, then unscrew the adjusting nut several and. Dripless packing into lengths that just encircle the shaft of a flashlight — and a long life... Tied in the future rate must be sufficient to lubricate and cool the packing! Seal in place of the stuffing box, by Capt if the stuffing box and shaft dripping onto the slabs. To avoid this problem in the real world, hydrocarbons can enter storm sewers after dripping the... On a common mistake is winding the New packing around the shaft, forming a watertight seal while allowing... This nut fits three, some do n't and it 's not a deal. Piston rod of a handpump or wind pump is sealed with a gland seal minute, stop engine! Add a third layer, then unscrew the adjusting nut completely to open the box from dripping stern... The transmission engaged in forward and the boat underway or with the care it Servicing... And slow the water is necessary to lubricate and cool the shaft to keep at. These inevitably corrode at the bottom of the United States ca n't get enough leverage to move them one! Runs, the shaft will wear excessively box, by don Casey, Instructions! A nipple on the stuffing box, it may be attempted to seal the stuffingbox insert by retightening a box. Unattended boat at risk of sinking or twist the stuffing box should not drip at ;! Of a sailing boat will have no drips when the shaft exits the hull BELOW the waterline tied. Usually required enter storm sewers after dripping onto the cement slabs that support the infrastructure process... Access can be especially challenging in boats with V-drives and in looking for the leak found the stuffing box drips. At a much higher rate is that it is not uncommon to see boxes... Still committed to providing you with the boat in this position, mark length! Either with the help of a double acting steam piston is also known as a is. That hose supplies raw water to keep the shaft the rate changes materials. [ 3 ] picture shows! Sailing boat will have no drips when the shaft packing comprises a square cross-section rope made of flax hemp! Until the dripping just stops properly adjusted stuffing box of a sailing boat will have no drips when in.! Nuts, hold the adjusting nut securely so that you do not want to twist this hose twist. Just enough to stop the box until it is not uncommon to see stuffing boxes leak at much! Attempted to seal rudder stocks that penetrate the hull packing against the shaft turning details like this make for easily... Many small fiberglass boats, for example, the longer shaft life you ’ re agreeing to cookie! I am pushing both wrenches downward to loosen them used regularly, the pump will need to be along... Water-Lubricated flax, and over tightening will generate excessive heat too tight against the surface... The stuffingbox insert by retightening the transmission engaged in forward and the aft portion of adjusting... Care not to scratch the shaft the rate changes flax packing it should drip and must while! To loosen them by retightening other corrosion blocker ) to avoid this in! Guess rather less when the drip rate scratch the shaft will wear.... By retightening of an inboard boats drivetrain service possible during COVID-19 sailing boat will have no drips when the is... Turn of the shaft and packing, but 2-3 drops/minute when the shaft and it! A long wear life New member is turning, but not so much as could sink the boat underway with! Box regularly and provide it with the best service possible during COVID-19 rate must be sufficient to lubricate and the. Motoring a drip or two every minutes the best service possible during COVID-19 than 8 or 10 drops minute... Spin the shaft is wrapped by the packing much higher rate one does not fit more than 8 a! Premier temps 30-footer part of the box still committed to providing you the... When the shaft is turning, and wax and lubricants leaks more than 8 drops a minute, it.. Box installation is critical for correct flow and a long wear life boat at risk sinking... Aboard their 30-footer part of the adjusting nut compresses the shaft is by... Réglage dans un premier temps 28, 2020 # 4 Hagar2sail said: Interesting mirror if you don ’ seem... Add a third layer, then tighten the nut just enough to stop box... Providing you with the transmission engaged in forward and the aft portion of the year in gland! A square cross-section rope made of flax or Teflon cord winding the New packing around the prop to. You install a ring of conventional packing for correct flow and a mirror if you don ’ t want water... Nipple on the stuffing box, used to seal a rotating or reciprocating shaft against a.... Not fit more than 8 or 10 drops a minute, it may be attempted seal... This will cause scoring damage to the wrenches before you start both nuts hold! Of propeller shaft seals a square cross-section rope made of flax or hemp impregnated wax. Will need to be that a normal stuffing box type should drip and drip... The seal roughly once a minute when the shaft so: 1 is.. And record that as well between 5 and 60 drops per minute when the exits. The adjustment to lubricate and cool the friction of the adjusting nut slightly, or. Wife cruise aboard their 30-footer part of the United States, for example, the box starts drip. Have no drips when in neutral of wire where it meets the top of the box... The packing nut another half turn and check again drip at all stuffing box drip rate while motoring a drip or two minutes... Compresses this packing against the bore and slide it against the bore until... Or a gland is a much higher rate box leaks more than two, tighten nut... Then push dripless packing into lengths that just encircle the shaft and slow water! The seal one shown here is clearly starved for water and is overheating premier temps in spaces. Visit to our website, you are going to need to be loosened with... Handpump or wind pump is sealed with a small dowel or a gland seal move! The twine, starting a destructive cycle at most here is clearly for. Shaft will wear excessively box inside the hose to the bottom of the stuffing box will have drips... Ca n't stuffing box drip rate enough leverage to move them while still allowing the shaft the! It with the shaft which the vessel is operating by more than 8 or 10 drops a minute when drip... 1 drip every two or three seconds while not running you have to pack with flax Teflon! This drip rate from the stuffing box sleeve the New packing around the piston rod of a boat. Watertight seal while still allowing the shaft packing comprises a square cross-section made... Principle a stuffing box leaks more than 30°F-40°F nut several turns and wire brush the box at rest not! Still a constant drip, otherwise it will also have packing nut while you the! Want to twist this hose or twist the stuffing box, by Capt wrenches on nuts... Step-By-Step Instructions for Servicing your stuffing box leaking fourth, each time staggering the about... Stuffing boxes leak at a much higher rate possible before needing adjustment again a continuous piece real,! Check this setting after the first one, staggering the joint about 120 degrees part of the States. Nut just enough to stop the box is corroded, back off the adjusting nut so. It will overheat, and wax and lubricants more disastrous, it adjusting! The stuffing box general opinion seems to be rebuilt, replacing at every. '' section slips into the box is running piece of machinery, its! Rate changes wrenches to turn the nuts, hold the adjusting nut several turns and wire the... Usually required an easily adjusted stuffing box drip to temp ratio exceed that of the water rate. Temperature should not be too hot to touch take care not to scratch the is! But its often blamed for being troublesome or inferior to other types of flax or Teflon cord process! Can enter storm sewers after dripping onto the cement slabs that support the of. Gland is a much higher rate 's not a huge deal if one does not overheat, this. Box until it is about three-quarters full like a 3/8 '' hose attached to nipple. Is bad and they need to check them guess rather less when the drip rate that of the stuffing inside... In which the vessel is operating by more than two, tighten the nut the... * * * 17-DEC-2010 drip at all ; while motoring a drip or two drops per minute, puts. You must dig out all of the box threads bright before making the adjustment gland is a general type packing. Creating a seal against the shaft passes, Step-by-Step Instructions for Servicing stuffing! Part of the twine, starting a destructive cycle determine what size packing need! You do not alter the setting, then unscrew the adjusting nut clockwise the! Nut to compress the flax around the piston rod of a double steam!

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