Reuniting a Pump and Motor
There are a dozen reasons you might have to separate a pump and motor. And when that work is done and you're ready to put everything back together, there are certain things you must do to make this reunion as smooth and seamless as possible.
Have a fresh tube of waterproof grease on hand. A lubricant like Vaseline Petroleum Jelly will work short term but soon evaporates. The green 'Aqua Lube' works hard long term but is incredibly messy. I prefer something like the clear 'Magic Lube', a silicone grease that works long term but is quick to clean up. You'll want to lubricate the surfaces of every seal and the threads on every bolt to keep your pool pump and motor in the best possible condition.
Pool owners planning long term will remove the four, skinny thru-bolts on a new motor and grease the threads. This is something the manufacturer does not do as such preventative maintenance slows the sale of new motors. Remove, grease and replace the thru-bolts one at a time and, in a decade or two, when it becomes necessary to replace the motor bearings and you've already retired to your vineyard in the South of France, it will be still possible to get the motor apart and the repairgal will marvel at your foresight and sing your praises for an entire generation.
If it's been more than a few months since the pump seal was replaced, change it now. The $15 you spend will save you from having to go back, reopen the pump to replace this pump seal when it starts an undeniable and aggravating little drip.
(top photo) Grease the 'O' ring on snub nose of the diffuser. When you press a pump and motor together and it refuses to move, it's usually a dry diffuser 'O' ring that's the emergency brake holding up this show.
With the Hayward type pumps that rely on bolts to join pump and motor, grease the threads of all 4 (or 6) bolts and get them all well started before you torque any of them down. Then work in a circular pattern to seat the pump seal.
(photo left) With Sta-Rite pumps that rely on a large steel band to joint pump and motor, first grease the edges of the pump where the band rests. This will facilitate tightening the band without resistance from the pump body.
(photo right) Grease the threads on the tightening bolt and tap the band with a non-metal tool ( a plastic or rubber tool handle or even a stick works without fracturing the metal band ).
Every new motor comes with a replacement 'torque absorber', a 2.5" X 1/2" rubber motor pad that sits between a new motor and plastic support base. This helps hold the motor in proper position, preventing thread fatigue on the clamp or bolts holding pump and motor together.
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