This article teaches you how to replace the mechanical seal. They are situated on the shaft of the motor. Due to the rotation of the impeller, centrifugal force generates, and vacuum is created. You need to put the wrench over the motor shaft. Install with a similar-sized socket. Take the wrench and secure the pump ends together. Jun 16, 2009 #1 Coolant is slowly leaking from the weep hole (the small round one); it is a very slow process, may be a drop or two per day. What You Need To Know About Cartridge Seals? Screw the impeller onto the motor shaft of the pump. Does the ceramic disc go against the water pump impeller and the two rubber parts go against one another? Mechanical seal for pump is a kind of dynamic seal assembly, which is widely used on the rotating shaft. The seal may not function well if the face gets body oil on the face. Remove the airbox, exhaust pipe and resonator. A mechanical seal is a device that is used to control leakage between a rotating shaft and a liquid- or gas-filled vessel. How to Respond to Mechanical Seal Leakage in a Centrifugal Pump? I had a new mechanical seal pressed in place, and I'm wondering about this ceramic disc (with rubber on one side) and the rubber bit on the mechanical seal. To get at it, disconnect the electricity supply to the pump at the circuit box. It has a shaft that spins at great speed and rotates an impeller. In a centrifugal pump, the mechanical seal (referred to as the “shaft seal assembly”) prevents the water that is being pumped from entering the bearing housing of the pump or simply the area between the motor face and the volute where the shaft passes through. Mechanical seal on a water pump is a shaft spins at incredible speed and rotates an impeller. How does it seal around the water pump shaft? It prevents water entering the electrical motor. Hence, utmost precaution is needed. Below, you will see a sequence of photos which will help us identify the seal assembly you have. When these deposits break off, they can damage the water pump seal. What is a Mechanical Seal in a Centrifugal Pump? Get a wikiHow-style meme custom made just for you! A mechanical seal is one of the key elements in the design of these pumps. When water accumulates on your mechanical room floor and it’s not due to a condensate issue, then there is a good chance that your pump is leaking. uses cookies to be able to optimally ... How to replace and install a mechanical seal. Consisting of at least a pair of end faces which are perpendicular to the rotating shaft, mechanical seal acts on the end surface through fluid pressure and compensation mechanism (elastic force or magnetic force). If you go that far, replace both the oil and water seals and the bearing in there. Remove the coolant from the engine using a siphon, wet/dry vac. 5. IMPORTANT: Use the mechanical seal installation tool to install the water pump seal, PN: 2872010. Thus, water gets pulled in the pump with a tremendous force. Set screw the rotary unit to the shaft sleeve (if seal is supplied with holding clips, remove at this time). Mechanical seal on a water pump is a shaft spins at incredible speed and rotates an impeller. Replacing mechanical seal (water pump) Thread starter klam06; Start date Jun 16, 2009; klam06. Don'f forget to buy a new water pump cover gasket. I've attempted to pull the water pump off due to the dealer said it was probably a mechanical seal, and I needed to pull it off to replace it. #1 they were applying oil on the press fit area of the oil seal and rotary seal, the manual says to apply engine oil on water pump shaft and apply grease on the lips of the oil seal, never apply oil on the press fit area of the oil seal and rotary seal. Bought another mechanical seal at $30.00 installed it and the same thing happened. In this Service Tip of the Month, our R.L. You can also push it out from behind instead, using a screwdriver knock out the old ceramic seal. The pump is ready again! wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. What makes the water move through the plumbing system when you use a centrifugal pump? Which is the best and most effective sealing technology for your pump or agitator application? ... Lubricate the casing where it seals against the O-ring on the seal housing. Regular maintenance of these seals is needed to ensure there are no leaks. When a water pump is new, some seepage from the weep hole is normal as it takes about ten minutes of operation for the pump’s internal mechanical seal to properly seat itself (break-in period). Your email address will not be published. Thus, a vacuum is created through centrifugal force which pulls water. You need to ensure that there is no possibility of the pump starting up while you change the seal. Place the plumbing and secure it using glue and primer. Use the rear brake with the transmission in 1st gear to remove the *LEFT* handed impeller and shaft. I've attempted to pull the water pump off due to the dealer said it was probably a mechanical seal, and I needed to pull it off to replace it. Do not use any type of tool that could result in impact damage on the seal or any rotating pump part. Be sure to wear the right safety gear including industrial grade shoes, hard hats, protective gloves, safety glasses, etc. Open up the pump housing. To prevent the water from entering into the electrical system; a mechanical seal is installed centrifugal pump behind the impeller. Joined Aug 14, 2006 Messages 25 Location KS. They are situated on the shaft of the motor. This article will explain what a mechanical seal is and the key design features that make them work. What makes the water move through the plumbing system when you use a centrifugal pump? Given the general geometry of a mechanical seal, anywhere that there’s a gasket or an o-ring, there ensues a potential leak point: An eroded, worn, or fretted dynamic o-ring (or gasket) as the mechanical seal moves. ... A little bit of water will facilitate the removal of the chemical residue on the shaft. This article has been viewed 33,547 times. Check the owner's manual to find out if the pool must be drained for pump repairs. The work of a mechanical seal is to prevent water leakage along the shaft of the pump. When qualified engineer replaces or installs the mechanical seal, he opens the pump system … Use the wrench to hold the shaft. Its main responsibility is to control leakage. Has anybody successfully installed the mechanical seal themselves without taking to a shop. Refill with 60% distilled water and 40% silicate-free aluminum-compatible anti-freeze and check/top-off, when COOL, after your first ride is done. 2. Be careful not to damage the plastic of the seal plate. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. b) Slide rotary unit on shaft sleeve and set the back of the rotary unit on the second scribe line as determined in step 8. Although the seal is often blamed for the equipment failure, the real reasons are typically found in the operation and mechanical condition of the pump or the seals' environmental control system. Figure 3shows a double lip seal packed with grease between the primary and secondary lips.When two seals are installed in tandem, the entire space between the two seals may be packed with grease.In some cases, seal suppliers will pre-lube seals upon request. Rings of ceramic, carbide, carbon or composites of these materials are lapped flat in the range of less than 1 micron on an axial end face. Make the electrical connection. I am guessing the installer collars are a requirement. It is also known as the end seal. The Home of Aussie ST Riders. Base-mounted 1510 pumps most often leak through their seals. 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I am guessing the installer collars are a requirement. A mechanical seal positioned just behind the spinning impeller on the motor shaft prevents water from entering the delicate electrical motor of the pump. By using our site, you agree to our. Align the bolt holes on the motor and wet side of the pump. A mechanical seal positioned just behind the spinning impeller on the motor shaft prevents water from entering the delicate electrical motor of the pump. Slide the seal gently along the shaft without touching the front face of it. where a rotating shaft passes through a stationary housing or occasionally, where the housing rotates around the shaft. Before doing anything, disconnect the pump first. The reliability of a seal depends to a very large extent on its ability to maintain a thin fluid film in the gap between the mating faces while simultaneously minimizing the duration and extent of mechanical contact between asperities on the rubbing areas of these faces. The step-by-step process to replace a mechanical seal on a water pump. Now slide the remaining portion of the seal off the shaft. The faces in a typical mechanical seal are lubricated with a boundary layer of gas or liquid between the faces. To know more about Mechanical Seal call on +91-(2739) 271592 or email at info@leakpack.com. We are also offering good mechanical seal products but also offering tungsten carbide, silicon carbide, Seal water is used for cooling the seal and lubricating the seal faces. Various mechanical seals for water and sewage. Use a saw to cut it. Expellers can also be more cost-effective than mechanical seals and, since repairing mechanical seals can cost up to 60% of the installation, price is a factor for many. In order to assure you receive the correct seal for your pump, it is very important that you supply us with accurate information. BEFORE opening a pool pump to replace a seal be sure to inspect all other components of the pump for leaks. b) Slide rotary unit on shaft sleeve and set the back of the rotary unit on the second scribe line as determined in step 8. • Behind the spinning impeller, a mechanical seal is positioned. Do the carbide surfaces require lubrication at install? Long ago, companies didn’t want to switch to mechanical seals because of the complicated installation and need to completely disassemble the equipment. The work of a mechanical seal is to prevent water leakage along the shaft of the pump. This article has been viewed 33,547 times. To create this article, volunteer authors worked to edit and improve it over time. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. Your email address will not be published. Damage to pump seals swimming pool and spa, takes place due to overheating, vibration, and a sudden change of water pressure. Maintenance — “Knowing you have a maintenance crew that understands mechanical seals very well and can maintain them properly is another factor,” said GIW Southern Region Manager and slurry pump expert Angela Bryant. Regular maintenance of these seals is needed to ensure there are no leaks. Has anybody successfully installed the mechanical seal themselves without taking to a shop. The seal usually will force removal of the pump from service because of an unacceptable leak rate or, in some cases, a level or pressure alarm. Tiny particles can create wear and destroy seal faces, causing leakage. Before starting the machine, ensure that the glue has dried off completely. Why do mechanical seals need to evolve with rotating equipment? When there is damage to the seal due to wear and tear, it becomes mandatory to replace it. Mechanical seals are used in centrifugal pumps to keep water or any liquid from making contact with the delicate parts of the machine. where a rotating shaft passes through a stationary housing or occasionally, where the housing rotates around the shaft. Generally the housing will have sunken bolts that can be unscrewed. I am replacing the oil seal/water pump seal with a Quad Logic kit and it has an O-ring in it and I need to know where it goes. It prevents water entering the electrical motor. All filtration systems for pools and spas, involve the use of several pieces of equipment. Predicting the service life of a mechanical seal is not an easy task, since the performance of the seal on the macro level is affected by many phenomena on the micro level. Assure that the seal chamber is cleaned and shaft is de-burred to remove any sharp material that could damage seal sleeve ‘O’ ring. Too loose will result in the seal leaking prematurely. This article teaches you how to replace the mechanical seal. KSB Pumps Co.,Ltd. A mechanical seal pump could potentially save you a lot of annual costs. Leak-Pack specialize in providing solutions to all types of leakages by manufacturing Mechanical Seals and Sealing Components as per customer’s drawings, samples or requirements. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. I have a coolant leak coming from the tube running out of the water pump. 7 Things to Know Before Selecting Metal Bellows Seals for Your Application. Bought another mechanical seal at $30.00 installed it and the same thing happened. Why is it important to ensure mechanical seals are correctly tensioned? Dirt on the seal face, even oil from finger prints, can set a mechanical seal up to fail. or a drain pan. Replacement of Mechanical seal Mechanical seals are used in centrifugal pumps to keep water or any liquid from making contact with the delicate parts of the machine. Ed. To prevent the water from entering into the electrical system; a … Mechanical seals vs. pump packing? According to the service manual the procedure is fairly straightforward. Installing the mechanical seal; How to install the water pump mechanical seal - Honda CX500, GL500, CX650, GL650. Using too much water for this application isn’t a problem, but excess water consumption can drive material costs up. Refer to pump vendor manual and maintenance records to ensure proper cartridge seal will be used. Realising my limitations I sourced the Honda parts and asked a bike mechanic to do the job for me. Carefully slide the mechanical seal over the shaft sleeve toward the bearing assembly. Changing a shaft seal (mechanical seal) of a swimming pool pump: Shut down the pool pump motor and disconnect its power supply (you might be able to do this at the fuse box). Packing and mechanical seals used in fluid applications both require constant cooling and lubrication, and water is the most common means for achieving this. Simple replacement, double benefit . Required fields are marked *. Include your email address to get a message when this question is answered. The seal is the most difficult leaking pool pump repair and should be attempted as a last resort. Remove the hose connected to the water pump cover. A double-acting mechanical seal without a water control device typically uses at least 4 to 6 liters of seal water per minute. Basics of fluid pump sealing. They are situated on the shaft of the motor. In this pump, a shaft spins at incredible speed and rotates an impeller. Mechanical seals require clean water, or other compatible liquid, for the lubrication of the seal faces. To perform the task, you must open the pump system and remove the impeller from the shaft. Actually there were two of the things that the Service Manual says not to do that they were doing in those videos. Take the pump in a bigger workspace. Place the pump in the original position. Because mechanical shaft seal failures are the number one cause of pump downtime, we decided to dedicate this column to mechanical seal basics. Always check the installation instructions to ensure the lubrication you choose is compatible with seal components and the product pumped. If the tension is too tight, the new seal will not last as long due to more heat from increased friction. It is the concept of centrifugal force. Turn off the power and disconnect the pump from the electrical system. Move the bearing assembly into position on the pedestal and install the bearing hold-down bolts. 3. This is the 1st time I'll be doing a mechanical water seal replacement. The obvious function is that of a check valve to prevent liquid under pressure from leaking out of the pump, or from drawing air into the pump when under vacuum conditions. A mechanical seal is simply a method of containing fluid within a vessel (typically pumps, mixers, etc.) The pool pump seal is inside the pool pump motor. Leaks from manifold cracks, threaded connections and loose winterization plugs can all leak. 4. I have a coolant leak coming from the tube running out of the water pump. A mechanical seal is one of the key elements in the design of these pumps. Remove the old seal assembly - Using a pair of channel-locks, pull off the old pump spring seal from the motor shaft. Share this post. The “mechanical” seal within the water pump is created by the steady flow of fluid within the pump itself. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. A mechanical seal is a device that uses the centrifugal force to push water through the hoses and plumbing system. Do rotate the pump manually A lot of mechanics stick to the following procedure: replace the water pump, tighten the bolts, install the belt, tighten the tensioner, refill the cooling system … and start the engine (or just rev it up). This article will explain what a mechanical seal is and the key design features that make them work. Dirty work surface/hands. Replacing these mechanical seals involves opening the pump system, removing the impeller from the pump's shaft and sliding the old seal off the shaft. The task of replacing the mechanical seal is over. To create this article, volunteer authors worked to edit and improve it over time. All tip submissions are carefully reviewed before being published. Mechanical seals are used in centrifugal pumps to keep water or any liquid from making contact with the delicate parts of the machine. Use the same mark. I am stuck after the oil seal and wanted to make sure I do not install more without having to remove. One of the most important being your spa or pool filter pump. Let it dry well before using the pump. We are the manufacturer of water pump Mechanical Seals, which finds applications in diverse industries such as sugar, solvent & oil refinery food, milk dairies, chemicals, distilleries and other process industries. Using a wrench, unscrew the pump bolts around the housing. Also please note that any links provided may be part of an affiliate programme (viz. Open the impeller by turning anticlockwise off the shaft. You will need to purchase a new seal to be able to follow these instructions. I was having problems with the mechanical seal on my 2003 ST so I decided to bite the bullet and replace it, including the oil seal and bearing. The mechanical seal acts as a check valve and a slider bearing. Regular maintenance of these seals is needed to ensure there are no leaks. KSB's direct retrofit mechanical seals . Torque to shaft 18 ft-lbs and the impeller to 87 in-lbs when reassembling. It is the concept of centrifugal force. When installing a new water pump, you'll need to install a new gasket, special gasket maker (RTV and anaerobic types are the most common), or an O-ring seal, depending on your application (if necessary, check your repair manual). The more common end- or rotating-face mechanical seal designs feature mating faces as the primary sealing elements. To prevent the water from entering into the electrical system; a mechanical seal is installed centrifugal pump behind the impeller. I am stuck after the oil seal and wanted to make sure I do not install more without having to remove. The mechanical seal rotary assembly needs to be removed. Open up the pool pump cover and lift the motor and its bracket out of the way of the impeller, a rotating blade assembly. Thus, a vacuum is created through centrifugal force which pulls water. Put water in the system to test and the water just runs out the weep hole without the engine even running. Water pump mechanical seal replacement... ST1300 - 2002. Too much contact may overheat the materials; not enough contact may c… They are situated on the shaft of the motor. Look on the pump shaft, you usually can see the mark where the set screw was previously. If you are referring to a mechanical seal, then I usually find that if you phone the pump manufacturers and ask nicely, they will usually send out some information to help. The leakage that comes out the atmospheric side is fairly low; the leakage in a Hydrocarbon, for example, is measured by a VOC meter in parts/million.Before mechani… Download 601 KB. 4. Ensure that there is no power supply to the machine when dismantling it. More pronounced seepage and drips from the weep hole after this break-in period or leakage from the mounting surface are abnormal and signal part failure or faulty installation. Mechanical seal on a water pump is a shaft spins at incredible speed and rotates an impeller. Mechanical seal on a water pump is a shaft spins at incredible speed and rotates an impeller. Thanks to all authors for creating a page that has been read 33,547 times. Inside the center of the seal plate is the ceramic part of the pump seal. Install the pump casing and secure using the (8) allen head cap screws. This article teaches you how to replace the mechanical seal. In some cases, we are not able to directly cross reference a seal in our cross reference to pump manufacturers. Remove the motor from the wet end. A flow meter typically reduces the seal’s water consumption to 2 to 3 liters per minute, and a smart water control system can reduce consumption further to 0.05 liter to 0.5 liter per minute, depending on the application. It's important to do this to avoid electrocuting yourself. Put water in the system to test and the water just runs out the weep hole without the engine even running. Copyright 2017 Leak Pack All right reserved. What clearance should there be between the impeller and the backing plate? The sealed fluid migrates between the flat faces and form… We use cookies to make wikiHow great. Mechanical seal for pump is a kind of dynamic seal assembly, which is widely used on the rotating shaft. A mechanical seal is a device that uses the centrifugal force to push water through the hoses and plumbing system. Where can I find a step by step diagram for replacing a seal? 9) Install the mechanical seal in the pump: a) Place gland with stationary seal face and gasket on the pump shaft. You can also search for Vulcan seals on the internet and ask for one of their seal books to be posted to you (they are free). When there is damage to the seal due to wear and tear, it becomes mandatory to replace it. 9) Install the mechanical seal in the pump: a) Place gland with stationary seal face and gasket on the pump shaft. I am replacing the oil seal/water pump seal with a Quad Logic kit and it has an O-ring in it and I need to know where it goes. Additional Information. wikiHow is where trusted research and expert knowledge come together. KSB mechanical seals for water and waste water applications. Other mechanical seal hardware, which includes shaft sleeves, gland rings, collars, compression rings, and/or pins. They are situated on the shaft of the motor. Take the piece of the seal from the back of the impeller. Replacing these mechanical seals involves opening the pump system, removing the impeller from the pump's shaft and sliding the old seal off the shaft. Basics of fluid pump sealing. Consisting of at least a pair of end faces which are perpendicular to the rotating shaft, mechanical seal acts on the end surface through fluid pressure and compensation mechanism (elastic force or magnetic force). A mechanical seal is simply a method of containing fluid within a vessel (typically pumps, mixers, etc.) It is also known as the end seal. Deppmann technician Shane explains how to replace the seal on a Bell & Gossett 1510 pump. % of people told us that this article helped them. Insert the bolts first. You should cut the plumbing tube which is connected to the centrifugal pump. As obvious as it may sound,care must be taken to install the seal in the right direc-tion. To prevent the water from entering into the electrical system; a mechanical seal is installed centrifugal pump behind the impeller. It has a shaft that spins at great speed and rotates an impeller. Dirt or contamination in between the mechanical seals. The source of the water can be difficult to locate. Oil seal install before the water pump seal, I believe the side shown in the pic goes towards the engine,but double check the direction as you pull it out - someone correct me on this seal if I'm wrong - this job is not hard,just gotta be careful not to hit the white ceramic or the black carbon face. These lapped faces run against each other, one rotating with the shaft and the other stationary with the equipment housing. Cartridge mechanical seal installation. Now it is the time to assemble everything. Link to post In this pump, a shaft spins at incredible speed and rotates an impeller. Seal Life; Since the seal must function as a slider or friction bearing, the seal has an unpredictable life span. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/c6\/Replace-Mechanical-Seals-in-Centrifugal-Pumps-Step-1.jpg\/v4-460px-Replace-Mechanical-Seals-in-Centrifugal-Pumps-Step-1.jpg","bigUrl":"\/images\/thumb\/c\/c6\/Replace-Mechanical-Seals-in-Centrifugal-Pumps-Step-1.jpg\/aid5643939-v4-728px-Replace-Mechanical-Seals-in-Centrifugal-Pumps-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"