Adjust the gland, restart the engine and recheck the stuffing box. Stuffing Box Wrenches This picture shows two inexpensive wrenches you can use to loosen and tighten a stuffing box. Use two plumbers wrenches (or a pipe wrench, but the pipe wrench can chew up the metal) to hold the adjusting nut while loosening the thinner lock nut. Stuffing Box Adjustment. The cooler your stuffing box runs, the longer shaft life you'll have. Reproduction in whole or in part without permission is prohibited. Lubricating the seal requires that when the shaft turns, two to three drops of water per minute drips out of the stuffing box. The diaphragm gland is overhauled at the same time as the piston when it is withdrawn from the engine. There are several ways we can make this work. Heavy verdigris, however, can make disassembly and adjustment difficult. Helping Sailors Sail Offshore Since 1993. PB Blaster and Stuffing Box Adjustment This question is probably more for the attention of Maine Sail, but posted in the open forum if of general interest. This feature is particularly useful when: The stuffing box cannot be easily reached during operation. The stuffing box is self aligning. Initial Adjustment a. The nut is 4 1/8 inches and it is impossible to find a wrench that size so I had a machine shop make one out of 1/2 inch cor-ten steel. An oilfield stuffing box 10 employs mating flange plates 15, 16 with bolt holes appreciably larger in diameter than the bolts employed to hold the flange plates together, thereby permitting lateral displacement between the two flange plates. If it is leaking before you start the engine, it needs to be tightened up. The stuffing box prevents sea water from entering the boat's hull. Once Ultra-X® is in place, tighten the gland follower. Individual development and team work sail side by side in Ship 6. You’ll need two adjustable wrenches or two pipe wrenches. An adequate supply of grease is also required (Fig. Stuffing box overhaul. Post adjustment, by the dealer, of the packing nut yesterday, We tracked the temp of the nut, today, with an infrared thermometer. So far, we haven't been able to move the lock nut. Premature tightening of traditional flax can result in potential problems. With twin rudders and wheels, spacious cockpit, and ease of sailing, she's a true cruiser offering speed, stability, and good sea-keeping. Tags: None. I make final adjustments after the boat is launched. It is important that the stuffing box is completely filled solid with packing and compressed firm during adjustment to prevent formation of voids and excessive leakage. My issue is that the stuffing box in our boat does not look like anything I've found pictures of. An adequate supply of grease is also required (Fig. It’s also tricky to adjust the packing gland to get two to three drips a minute, and a number of adjustments may be needed to get it right. Hull 100 has been well maintained and fully prepped for her next sailing season. The drivetrain starts at the transmission and includes everything through the end of the propeller shaft – including couplings, drive plates, the marine stuffing box and shaft packing, or marine shaft seal, the flex couplings, the cutless bearing and more. There is the need for additional equipment in the form of a grease pump. Periodically spraying the stuffing box with a corrosion inhibitor will reduce accumulation of this material and make service easier. As soon as your boat is launched, check the stuffing box. RE: [Catalina 355:1151] Stuffing Box adjustment - How Warm Should it Get? But this white material is hard to cut properly and requires a fresh razor blade. Seems straight forward. A stuffing box, also called a packing gland, doesn't have to leak much. The recommended tool to tighten the stuffing box on my Ranger 31 is two "rigid E 100" tools which cost $30+ each. Learn by doing. On high-speed applications, the vent tube is connected to the raw water side of the engine, so seawater can be injected into the stern tube for cooling. Any (even slight) increase in temperature is … Any entrapped air, with normal temps this high, can cause a big spike in box temp. The stainless rotor is pressed against the flange, compressing the bellows and creating a seal between the flange and rotor. A stuffing box, also called a packing gland, doesn't have to leak much. So far, we haven't been able to move the lock nut. There should be no dripping when the boat is at rest and the shaft is not spinning. Won't two same size pipe wrenches also work? Discussion Starter • #1 • Dec 1, 2017. Generally, three to four rings will fit inside the nut. No waiting time, no freight charge, no unloading, storage, bottom paint or commissioning fees. External flush fluid leak rate from the stuffing box to dissipate heat caused by friction; Labor to adjust gland pressure to maintain minimal leak rate from the stuffing box; The best practice is to monitor changes at the stuffing box and replace the packing before costs increase. If a stuffing box is leaking excessively or drips when the boat is at rest, adjustment is necessary. When a stuffing box starts to leak excessively, you should tighten the packing nut until the leak stops. Our stuffing box on Makai is leaking a bit too much (around 12 drops a minute when the engine isn't running) and we're trying to tighten it. 4.Extend service life of stuffing, and in some degree optimize the working condition of polished rod. Repacking a stuffing box is a simple task. 2. As the gland nut is tightened onto the stern tube, the packing is compressed against the shaft, creating a seal. Contact your company's benefits or philanthropy administrator for more information. Most shaft seals have a nipple for a vent hose to ensure that the stern tube remains full of water for cooling the carbon/graphite flange. Sail with Horizon this winter in the Caribbean, BlueFuture Grants Help Get Kids on the Water, Sailing Totem: Bringing Holiday Spirit Cruising, On Watch: Advice for Heavy Weather Sailing, Sailing Totem: Insider Ideas—Totem’s 2020 Gift Guide, Eight Bells: Frank Butler, Founder of Catalina Yachts. O. odaydokay. (check if your company matches donations, to increasse the impact of your support). 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. ... And, they don't hold the adjustment very well. Why? Now turn the adjusting nut clockwise until the dripping just stops. Custom Search Back Normal Operation: Up Maintenance of Steam, Hot Water & Compressed Air Distribution Systems Keep the Dream Alive for the cost of a good winch handle. Racing layout below with classic B40 Hinkley interior woodwork, complementing dark green cushions, heat & AC, and a custom fireplace. She’s fully loaded and ready to go! The traditional stuffing box consists of stern tube which is slightly larger than the prop shaft. 56 Posts . If this fails it will fill up the boat with water quite quickly and should be double hose-clamped. You’ll rarely need to make any adjustments, and the Gore dripless packing will last for years. Various materials are used for the packing, traditionally flax, hemp and cotton, but… Senior Member. Your Offshore Sailing Network. 5 posts • Page 1 of 1. We can help you find a certified surveyor. Packing comes in various sizes, with 3/16 inch and ¼ inch the most popular sizes for shafts in the one-inch range. All Rights Reserved. This particular stuffing box is a 1 inch box from a 1985 Catalina 36 and uses three rings 3/16 flax packing. 1. In preparing for use, the following stuffing box checks should be carried out: [post_ad] Check the packing condition. Rings of flax packing should be inserted into the packing nut with the cuts offset by 120 degrees from one ring to the next. Some rudder stern glands work the same. When the water stops dripping, start the engine and put the transmission into gear for a few minutes. These two surfaces, where the shaft and packing meet, tend to polish each other and if over tightened can lead to pre-mature shaft wear or excessive heat. Examples are the United Way at Work program, Benevity, Pfizer, etc. Adjust. This “cutaway” photo, courtesy of the Chesapeake Bay Alberg 30 One-Design Association, shows the orientation of parts inside a flexible stuffing box. Figure 9.15. Sealing the shaft completely will cause a buildup of … Then shut down the engine and feel the stuffing box. Gain Quality Sea time towards your lifetime goals. You’ll need two adjustable wrenches or two pipe wrenches. The traditional method for keeping the propeller shaft watertight is the packed gland or stuffing box. The packing is wrapped around the shaft and inserted into the gland nut. 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. Through writing, photo/video, graphic design, and a broad array of media channels, the Lands Communications Specialist will tell compelling stories that advance land conservation campaigns across the Long Island Sound region. The best tool to use is the corkscrew-like tool available at any ship’s store. Forums for All Owners. Bottom rice sanded 2018, painted in 2020. These wrenches tend to be easier to use than pipe wrenches especially in tight engine spaces where many boaters must work. Gift in Kind Donations We accept many new and "good condition" boating products also known as gift-in-kind donations. A stuffing box—also called a stuffing gland, packing gland or packing box—forms a seal between the prop shaft and the hole in the hull through which the shaft passes while allowing the shaft to turn freely. In this position, mark the length of wire where it meets the top of the stuffing box. All, I have been trying to eliminate or at least minimize water leakage into my N28-2. The rigid stuffing box is mostly used in powerboat applications. Jan 1, 2006 5,271 Slickcraft 26 Greenport, NY Jul 24, 2017 #5 I used a large pipe wrench and an adjustable wrench like the ones used for a sink drain. The Jeanneau Sun Odyssey 389 incorporates the latest, most innovative technology of the line. 91 Bayliner 3888 with twin 150 HP diesels I just found that both starboard and port stuffing boxes are dripping quite a bit when the engine is not running. This greasebased packing can last for years and is very reliable. In these applications, alignment of the shaft to the stern tube is critical for proper operation. Here's an illustrated step-by-step to help you do it right. I've read how to tighten and repack them. Moreover, when you look at a stuffing box while underway at speed, you may not be able to actually see what is happening. The nut is 4 1/8 inches and it is impossible to find a wrench that size so I had a machine shop make one out of 1/2 inch cor-ten steel. Hoping someone here is familiar with what I have. Screw the nut onto the coupler and adjust while on the water for 1 drip every 10 sec. Privacy Policy, This website uses cookies to ensure you get the best browsing experience. Digital Boat Show. Teflon packing is great to use, and can last longer than flax packing. Want to be a paid skipper? DIY Stuffing Box Maintenance Saves Dollars and Makes Sense. Warranties included and fully transferable. To make properly sized rings of flax packing, wrap a length tightly around the prop shaft and cut across the rings with a sharp razor blade. The stuffing box lock nut; The stuffing box adjustment nut; The engine; There is also a rubber hose fitting hose clamped around the gap between the stationary nut and the hull. Sign in. dworfel: 6/14/14 5:24 PM: Thanks for the response. Replace Stuffing box adjustment. At the engine end of the shaft there is a stainless steel rotor which mates with the carbon/graphite flange. Once you have broken the lock nut and the gland nut free, spin the gland nut off the stuffing box towards the transmission. One wrench is a traditional pipe wrench and the other is a spanner wrench designed for a sink drain. Engines and Propulsion. Re: Teach me how to tighten rudder stuffing box Hi David, same boat so i assume same packing gland. Re: Recommended wrenches for stuffing box drip adjustment by Brian B on Mon Jul 08, 2019 5:55 pm Chimo wrote: Just as an FYI, I have about 270 hours on the boat and I’m at 5-6 drips/min. Once the backing nut is loose, slowly tighten the packing nut about 1/6 a turn at a time and monitor the drip rate, at rest, until it just stops. When properly installed and adjusted, a stuffing box will provide hundreds, if not thousands, of hours of reliable, nearly leak-free service. b. 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. You screw the tool into the packing inside the gland nut and pull out the old packing. It looks like you are using an ad-blocker! To adjust, back off the locking nut from the packing nut. Adjusting the stuffing box Post by cmeke0870 » Sat Jul 02, 2011 8:20 am Am having a surprisingly dificult time getting the adjustment right on my prop stuffing boxes. Exterior Varnish renewed annually. We may choose to use the item or sell it to help fund the program. Ship 6 is a volunteer run and youth led co-ed program for teenagers 14 and up of all backgrounds. With GFO they claim temps up to the 125-130F range are technically safe for the packing. Sail on different boats with different skippers to learn what works and what does not. Shaft seals do the same thing as a flexible stuffing box, but without the packing seal. The graphite provides lubricant and a thin layer of water provides the seal for the shaft. Stuffing box overhaul. Use 2 boxes of chicken broth if you like it moist, 1 box if you like it dry. Adjusting new packing for the first time is time consuming (up to 45 mins) c. Continually monitor gland and stuffing box temperature during initial adjustment. To pack the stuffing box when empty and assembled in the pump, remove the packing screw and nut assembly, and insert pellet form packing into the packing plunger guide. If we are not able to use the boat as part of our activities we may use it to help fund our program. You must grab the gland nut and locking nut in opposing directions, to reduce the torque on the stuffing box hose.
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