Aquaclear 70 Replacement Motor???

[CWO4GUNNER]

First measure how deep the impeller sits on top of the shaft. This is important because when you go to tap the new shaft in the old shaft hole you don't want to tap it in with the hammer too far.
So (1) measure or eyeball remember how far the impeller sit atop the shaft or how much the shaft sticks up through the old impeller.
(2) With a pair needle nose pliers grab and gently pull the old shaft strait out, you can twist a little while pulling but do not bend side to side, like pulling out a thorn or splinter from your hand pull strait.
(3) once out you are ready to tap the new shaft in strait into the shaft hole tapping the end of the shaft a little at a time (not banging), each time checking with the old impeller how far its been driven inside until it matches s exactly the same as the old shaft.
(4) remove impeller out of the way so you can see just the shaft, the new shaft should be centered in the middle of the big housing hole, if not centered push a little on the opposite side until centered, now your good to go.
(5) Install the new impeller magnet and you have a new rebuilt motor.

Even if you goof it up and bend the new shaft and drive it through the bottom of the motor, all you'll be out is $3 since you were planning to buy a new motor anyway, so for a $3 shaft its worth it to learn and try something new.

 

[GEV83]

Oh ok cool that dont seem hard at all. Ill try making my filter rebuilt then =) ummm ohhh im amazed that it still runs actually considering its OLD its actually a Aquaclear 300 but I know the 70&300 are the same just diff name.

 

[CWO4GUNNER]

Just to be on the safe side I would use the 300 parts name like when I rebuilt my 300 encase there was a change in shaft size, but yes it should be the same. I think I left you a link in an earlier post where you can buy them right. Oh one thing I forgot to mention, don't use pliers on the new shaft you'll scar it up, tap-tap-tap with a small hammer.

 

[GEV83]

lol no pliers with new shaft only tap tap tap with small hammer got it lol and yeah you left me the link so I could get the replacement parts.

 

[CWO4GUNNER]

Oh and if needle nose don't grip well to pull out the OLD shaft then use a pair of locking pliers on the tip and have someone hold the motor strait while you pull the shaft out strait.

In a pinch since the shaft is the same at both ends (either end in or out), I have flipped a worn shaft around to use the other end that has no ware nicks or gouges and it works good sometimes on an old impeller for a short time. I call it a Texas rebuild.

 

[GEV83]

Oh and if needle nose don't grip well to pull out the OLD shaft then use a pair of locking pliers on the tip and have someone hold the motor strait while you pull the shaft out strait.

In a pinch since the shaft is the same at both ends (either end in or out), I have flipped a worn shaft around to use the other end that has no ware nicks or gouges and it works good sometimes on an old impeller for a short time. I call it a Texas rebuild.

LOL Texas rebuild??? Why u call it that??? Dang need to order that part been busy so forgot bout it.

 

[CWO4GUNNER]

Didn't you know that the Texicans come up with some of the best shortcut no cost solutions on the spot ever devised! I should know my Dad became one when he immigrated from across the Rio Grand lol.

 

[GEV83]

LOL nice pic. Yeah all I know bout texans is they got an obsession with having things bigger. Im gonna try flipping over the ummmm shaft see how long it works the site wasnt letting me check out this morning

 

[CWO4GUNNER]

Remember a sign that the shaft is worn is you will see gouges or ware ruts in the shaft. If however its all even and smooth then it has to be the impeller magnet hole that has all the ware and tear. The hole will be out of round or not a perfect circle, oblong and sloppy on the shaft. If that is the case leave the shaft be and get a new impeller magnet only or swap it out with a spare AC 70 you have to verify the problem. But as a rule of thumb you always replace them as a pair. Remember before flipping the shaft measure the depth against the impeller magnet because the shaft must be all the way in but if you drive it too far you will crack the bottom seal on the motor. And although you will use pliers to pull the shaft out gouging up that end of the shaft, you cannot use pliers on the sweet end or the marks and burs from the pliers will ware the impeller out real fast.