A remote greaser hose goes to the stern tube. Similar types are made by Vetus, and another was fitted as original equipment on the Albin Ballad,Â shown hereÂ http://www.ballad.no/pakkboks.htmÂ although theseÂ contain grease. The GFO Marine Shaft Packing is approved by the American Bureau of Shipping. This drawing shows what is possibly the most common packing arrangement. From United States +C $37.06 shipping estimate. £226.26. And another one, maker unknown, installed in a 1981 Comar Comet 1000. The Deep Sea Seal is a self-contained unit that requires no setting or adjustment. I use a deck screw as a puller. The outer bearing carrierÂ can then be removed,Â as shown in a photograph below, centre. This is either led to a point well above the water line for slower craft or plumbed in to a pressurised supply for vessels capable of more than 12 knots. The vent tube obviates the need for ‘burping’ of the seal after drying the boat. In this case, the Seals generally used on: Working and fishing boats. A commonly known example it the head of a faucet. The injection elbow is integral to the engine package and proprietary to VW.Â A trickle of water passes at idle andÂ more at speed. It consists of a threaded sleeve and a … Stuffing box serves two main purposes. It may be that the gland nut has been tightened excessively, forcing the fractured region against the end of the fixed body. Toilets, holding tanks and associated matters, Bore glazing and polishing in diesel engines, Setting up your masthead standing rigging, http://www.tidesmarine.com/seriesone-shaft-seals.shtml. Alibaba.com offers 198 marine stuffing box products. Ninety percent of all sailboats with auxiliary inboard engines have a flexible stuffing box with traditional packing gland that usually goes unattended until it … Three or four rings are normal for small and medium yachts with auxiliary engines. RE Thomas Marine Hardware manufactures the best shaft seals, rudder ports, and bronze stuffing boxes. Stuffing Box Arrangement. 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" or "stern gland" in this application. Stuffing boxes are also called stuffing glands, packing glands or packing boxes but they are really all the same thing. The packing rings, three or four in number, are compressed by the gland nut against the stuffing box body to exclude water in the stern tube, which is at the right hand side in all of these drawings. Release the prop shaft from theÂ gearbox coupling to free the unit.Â The centre housing can be slipped out of the rubber bellows by releasing the two clips.Â The seals and brass bushes are a very tight sliding fit within the casing, secured with Loctite.Â Replacement seals are standard items widely available, from e.g. In contrast, flax packing acts as an insulator, trapping frictional heat that can cause shaft damage and loss of seal. O-rings mounted in internal grooves between the collar and the shaft prevent leakage of water at this joint. A somewhat unusual one with a greaser. 2- … Â A most unusual failure of the gland nut of a stuffing box. or Best Offer. A small amount of water should be allowed into the boat to ensure that no air remains. Â A connection to an anode protecting the stern tube can be seenÂ in the foreground. TheÂ tightness of the small grub screw(s) on the right hand side of the unit is critical- These clamp the sleeve to the prop shaft. When the gland was finally removed to be replaced, it was found that there was no positive meansÂ to prevent the frictional torque from being taken byÂ the rubber. On rotation a very thin film of water forms between the faces, lubricating and cooling them. The stern tube is welded into the hull with a plate across the side compartments to strengthen its inboard end. The stuffing box prevents sea water from entering the boat's hull. find … The main difference between older and current production is the vent tube. Stuffing Box Gland Packing. Order) 12 YRS . Simply Bearings.Â Re-assembly is straightforward but ensure that the bushes and seals are spaced so the centre sleeve is constrained within the seals. A copy of the HMI shaft seal instruction manual is helpful. A packed gland installed in a 1983 32′ motorboat.Â The hose attachment at the aft end is a Â water feedÂ that is tapped into the log. 5. The stern tube housingÂ is all phosphor bronze and contains a bearing aft. Tides Marine seal installed on a Moody 31. Packing rings in this design are easy to change but slight loosening of the gland nut will result in water leakage. There is a photograph below. The locking ring is in the centre. £70.48. December 4, 2008. The tube on this lip seal is connected to pressurised water downstream of theÂ raw water pump. The seal face is flushed with fresh water before wintering in an attempt to avoid a repetition. Stern tube showing ‘dogs’ intended to engage with the stern gland, relieving the rubber hose from torsional shear. In this case the small water pressure has driven it forward into the boat. US $12.54-$15.00 / Kilogram 10 Kilograms (Min. Top Rated Seller Top Rated Seller. A conventional fixed stuffing box, grease lubricated. You could probably get by with 4 or 5 turns. This is the moulded packing or stuffing box for the prop shaft. Use a stick, like a paint stirring stick, to push the new packing down in the box, I have a piece of split pipe that works well. Supplied complete with installation tools and a … Once fully tightened the packing rings are compressed within the body. For stern gear dimensions click here. EDIT: Since writing this I have conducted extensive temperature testing of packing glands with a fixed temp probe mounted directly to a traditional bronze stuffing box. £6.00 GBP. This allows the shaft to move inside the stern tube to accommodate soft engine mountings. Once the drip rate is at minimum, without heating the gland, the locknut is tightened against the gland nut to hold it in position. Leakage Â increased rapidly toÂ a much higher rate.Â Over the space of two weeks the boatÂ filledÂ up to almost two feet deep and was close to sinking.Â AfterÂ salvaging it and drying it outÂ the source of the leak was found.Â The rubber hose in the photo was split beneath, and found to beÂ generally in very poor condition.Â It was probably as old asÂ 20 years or more. This gland is attached to the stern tube by a short length of hose, which allows a certain amount of movement to accommodate flexible engine mountings.Â In this caseÂ the greaser is remote, supplied via the nylon hose. Maintain this gland around the prop shaft to keep leaks at bay. This photo shows a seriously neglected stern gland, so heavily fouled up with old grease that it is difficult to identify its type. This makes them more watertight but more difficult to remove. On the left is the hose that attaches the seal to the sternÂ tube with a wide clamp. – Thick wall - 3/8" (10mm) The stern gland or stuffing box as it is sometimes refered to is a much maligned piece of an inboard boats drivetrain. To the right are two lips that bear on the shaft, retaining water when stationaryÂ or rotating. The most common problem that will be encountered is leakage of water into the boat. The Volvo seal isÂ entirely constructed from rubber, combining the hose that attaches to the stern tube with lip seals that prevent leakage of water into the boat. Its primary components are a threaded sleeve and a hollow nut through which the shaft passes. It is possible to change a Volvo seal (orÂ most other types) afloat, asÂ Â this videoÂ shows.Â Not advisable without some experience of doing it in easier circumstances. Graphite cotton gland packing is a replacement for the old traditional graphite asbestos packing rope. Graphite cotton gland packing must be regularly lubricated with quality water resistant grease, such as Ramanol White Lithium Grease or Morris K99 Grease. The other photos show the gland nut (above right) and the gland nut with sleeve (below left). Bronze or Aluminum. At right the bellows is compressed to the value given in the seal documentation. TheÂ Radice lip seal is similar to the Volvo but with the additionÂ of a vent to overcome the necessity for burping. At this stage it is quite likely that there will be no water drips at all. The cotton material is impregnated with graphite and provides good long term seal solutions on most applications. Your inboard powered boat needs a good performing stuffing box to form a water tight seal and keep water out. By Steve D Antonio. With the gland nut type, first loosen the locknut.Â These nuts are quite large, perhaps 50 mm across flats, and it is worth making or buying spanners to fit them before problems arise. A very similar arrangement, this time on a Moody 346. The fact that grease, mixed with water to judge by its colour, is entering the boat shows the packing to be in need of taking up. In the photograph these are heavily worn: 2-3 mm longer when new. It act as a sealing material to prevent leaks; It keeps the system operational and in cool condition. The integrity of the hose is critical, as failure will allow flooding of the boat. The reinforced hose carries seawater from the raw water pump that cools the seals and obviates the need for burping. Gland Seal (or stuffing box) This is a traditional seal that consists of a housing with a recess that is fitted with coils of a packing material and compressed onto the shaft with a pusher to form the seal. The initial action is to tighten the packing to take up any leakage. The Commercial Marine Expo is the largest commercial marine trade show on the East Coast targeting a variety of maritime related businesses including commercial fishing boat operators, tug boat and tow boat operators, passenger … Heavy duty Duramax Ultra-X comes packed standard on spools of: 1, 3, 5 and 10 pounds. MARINE/BOAT/SEAL STERN GLAND HOSE 2 1/4 " (57MM) INSIDE DIAMETER . In the photograph the face is at the narrow end of the black, tapered component.The counterface is a stainless steel collar ground to a very fine and flat finish, attached to the shaft by grub screws. People. One change made was to connect the oil tube from the top of the unit back into the oil reservoir, enabling the oil to recirculate as it heats up during operation.Â Later models were piped this way but earlier ones were only vented.The unit was bench tested with the new reservoir arrangement. Rotation of the shaft tends to pump the oil and return it to the reservoir. So 10mm and one jubilee clip were all that were keeping the water out,Â Tides Marine advisedÂ this was caused by overheating from running dry.Â Cause was a failure of the pressurised water feed. In this case there is no rubber hose. Rings of a soft packing material are placed around the shaft inside theÂ gland nut. In this case the body is bolted to the stern tube rather than attached by a rubber tube. The stuffing box is the conventional type with grease pumped in via a remote greaser, the grease fills the gap between the propeller shaft o/d and the stern tube i/d all the way back to the stern tube housing in the hull. Â A narrow line of crevice corrosion that has taken place between the shaft and the rotating seal. Sailing Totem: Bringing Holiday Spirit Cruising. Stuffing or packing boxes or gland let your propeller shaft spin while keeping water entry to a minimum. Invite customers to join your mailing list. This HMI seal was installed in 1998 and has performed very well.Â Replacement of the seals was low cost and preferred to fitting a new shaft seal. Disconnect the unit from the stern tube stub and release the grub screws securing the inner sleeve to the propshaft. R.E. This reservoir is mounted at above normal sea level,Â providing a small positive headÂ to counteract the pressure of water acting on the other side of the gland. Graphite cotton gland packing must be regularly lubricated with quality water resistant grease, such as Ramanol White … The tightening method is described below. No grease, no mess.Just cut into 2 to 3 pieces to length (the length to make one wrap around your shaft) to form the rings and install them in the shaft stuffing box.Make maybe one adjustment to the packing gland following a short run-in and never tinker with the stuffing box again! Â A sectioned Volvo seal showing the various parts. The whole bearing is made from rubber, the metallic appearance of the bearing area being due to grease deposits. Castellations, known as ‘dogs’,Â are formed at the mating ends of the stern glandÂ andÂ stern tube to prevent this. Various different arrangements will be no water drips at all performing stuffing.. To time completely troublefree stuffing box is identical to the stern gland repacking rotated, tearing the tube! Copy of the hose is multigrade 10W/30, monograde 30 or ATF to use opposing. Packing stuffing box is mounted inboard near the point the shaft inside the boat on the traditional shown. Lip seal is connected to an external anode and the shaft inside theÂ nut. Drips at all, Outrigger bearings and bronze outer bearings tube marine stuffing boxes and packing glands be removed after unscrewing from the tube! Designs the outer bearing housingÂ is all phosphor bronze and contains a bearing aft water to... 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