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To change a pump seal (Mechanical seal) isn't hard to do if you have technical knowledge, like for someone with mechanical skills.

For the every day person don't attempt you'll do more harm than good.......take the whole pump to a certified dealer who repairs and rewinds electrical motors. It will cost you approximately $50.00 unless the dealer finds a problem with the motor.

Most pumps are what I call totally enclosed which means the electrical motor and pump are one in the same, if the seal has been leaking for sometime?? water may have got into the electrical windings or bearings of the motor causing corrosion so having a certified dealer do the job will save you $$$

Mechanical seals for most pool pumps cost approximately $30-$40 or less.

Most mechanical seals that do fail are caused by- running a pump empty burning out seal, leaking hoses, fittings (clamps not tightened) on suction/discharge lines, pool water level too low, pump motor bearings worn out, rubber in mechanical seal dried out preventing tight seal around motor/pump shaft, O-Rings dried out/cracked or missing from pump casing or filter basket lid. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings), bearing grease, or OIL to lube O-Rings this will cause O-Rings to break down stretch preventing proper fit (water seal)

I use a product made by Dow Corning Molykote 55 another product from Dow Corning is called 111 a O-Ring Silicone lube Sealant cost approx: $3. These products are available from Canadian Bearings.

#1- To check if your pump (will hold its prime) has no leaks once its primed and you feel its pumping properly STOP! your pump.

Watch in filter basket glass if any air bubble is forming like getting larger over a time if you see the bubble getting large the pump isn't holding its prime.

Either your mechanical seal is leaking, check for water dripping from under pump casing, O-Rings not sealing- lube O-Rings, check hoses and connections repeat #1

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14y ago

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