maxijet mod on an aquaclear???

[ejmeier]

<a href=showthread.php?s=&postid=7744475#post7744475 target=_blank>Originally posted</a> by dhnguyen
The larger AC motors are the 4 pole type which makes the magnet to have a tendency to spin in one direction more than another. Unfortunately in the case of the AC, the direction is the reversed what we would expect. What you need is find yourself a right-handed 1.75" Dumas propeller and you should be fine. Most propellers are left-handed unless specfiied otherwise.

D.

Actually, I'm 90% that the 802 is not a 4 pole motor. The problem with the 802 spinning the dumas 1.75 backwards all the time is that it can't spin it forward. (That's how you know a prop is too big for an AC - it will only spin it backwards.)

The 1.75" dumas is too big for the 802 AC. Try the 1.5" wildcat prop, that one works well.

But you're right, the magnet is really strong, and it tends to not want to pop out and hit the stopper.

 

[dhnguyen]

I can't imagine why a 1.75" Dumas would be too much for the AC802 when a MJ1200 or MJ900 even has no problems spinning one. I would expect teh AC802 motor to be much stronger than both MJ900 and MJ1200.


D.

 

[pheel]

<a href=showthread.php?s=&postid=7748097#post7748097 target=_blank>Originally posted</a> by ejmeier
Actually, I'm 90% that the 802 is not a 4 pole motor. The problem with the 802 spinning the dumas 1.75 backwards all the time is that it can't spin it forward. (That's how you know a prop is too big for an AC - it will only spin it backwards.)

The 1.75" dumas is too big for the 802 AC. Try the 1.5" wildcat prop, that one works well.

But you're right, the magnet is really strong, and it tends to not want to pop out and hit the stopper.

That makes a lot of sense, it explains why a dumas 1.25 starts 50% of the time in the right direction.

 

[pheel]

<a href=showthread.php?s=&postid=7748152#post7748152 target=_blank>Originally posted</a> by dhnguyen
I can't imagine why a 1.75" Dumas would be too much for the AC802 when a MJ1200 or MJ900 even has no problems spinning one. I would expect teh AC802 motor to be much stronger than both MJ900 and MJ1200.


D.

That it was I thought, that why I decided to do the 802 first...

 

[dngspot]

<a href=showthread.php?s=&postid=7748097#post7748097 target=_blank>Originally posted</a> by ejmeier
Actually, I'm 90% that the 802 is not a 4 pole motor. The problem with the 802 spinning the dumas 1.75 backwards all the time is that it can't spin it forward. (That's how you know a prop is too big for an AC - it will only spin it backwards.)

The 1.75" dumas is too big for the 802 AC. Try the 1.5" wildcat prop, that one works well.

But you're right, the magnet is really strong, and it tends to not want to pop out and hit the stopper.

I have 2 Aqua Clear 70's that are on the table just about to be modified. I have installed tubing that I got from HD to the impeller and then installed ridged air line into it. How are you making the connection from the rigid air line to the Great Plans Wildcat prop? Drilling the prop?

 

[pheel]

<a href=showthread.php?s=&postid=7749583#post7749583 target=_blank>Originally posted</a> by dngspot
I have 2 Aqua Clear 70's that are on the table just about to be modified. I have installed tubing that I got from HD to the impeller and then installed ridged air line into it. How are you making the connection from the rigid air line to the Great Plans Wildcat prop? Drilling the prop?

you can drill the prop or do something similar to this

 

[dngspot]

<a href=showthread.php?s=&postid=7750001#post7750001 target=_blank>Originally posted</a> by pheel
you can drill the prop or do something similar to this

What is the white piece of plastic, and how is it used?

 

[pheel]

I used a rigid toilet tubing and put a wall anchor in it. I used a acrylic screw (that white piece) to attach the prop.

 

[ejmeier]

<a href=showthread.php?s=&postid=7748152#post7748152 target=_blank>Originally posted</a> by dhnguyen
I can't imagine why a 1.75" Dumas would be too much for the AC802 when a MJ1200 or MJ900 even has no problems spinning one. I would expect teh AC802 motor to be much stronger than both MJ900 and MJ1200.


D.

Weren't you paying attention to that thread of yours over there? Several people have tried the Dumas prop on the 802 (aka AC70) and it wouldn't spin it forward.

My memory is a bit fuzzy, as I haven't done any mods in a while now, but I do recall testing some props that a MJ would spin, and a AC would not.

dngspot - yes, I drilled out the great planes prop. What I did was gradually step up the hole size by 1/64" until you get to 3/16". IME, don't try to do it all in one shot, it makes it way harder and it might be crooked afterward.

 

[dngspot]

I found mod for the 802 on Hitchhiker's Guide to maxi's. Ball used a 2.5 to 2 inch reducer for a housing. Is this still the best option?

 

[dngspot]

I found the Hitchhiker's Guide to maxi's through a web search. Mother of goodness that thing is long. It was like driving through New Mexico, some interesting stuff, but enough desert already.
It is my understanding that the AC does not have the same startup power as the Maxi, but when the AC starts to move hold on to your shorts ‘cause this beach has some current.

 

[pheel]

<a href=showthread.php?s=&postid=7752101#post7752101 target=_blank>Originally posted</a> by dngspot
I found the Hitchhiker's Guide to maxi's through a web search. Mother of goodness that thing is long. It was like driving through New Mexico, some interesting stuff, but enough desert already.
It is my understanding that the AC does not have the same startup power as the Maxi, but when the AC starts to move hold on to your shorts ‘cause this beach has some current.

I lost a whole day trying to make the 802 to work with a 1.75 Dumas. It does work with two 1.25.

The rotor is heavy and doesn't come out when it spins in the wrong direction, it's very difficult to make it stop.

Enough for me, maxi-jet is the way to go.

 

[dngspot]

It is mentioned that the Dumas props have too much pitch or are to big for the 802. Ball has had good results with Great Planes Sidwinder prop. It is 1.5".

 

[dngspot]

I went to Home Depot today and found that the 1.5 to 2 inch works better, but am still interested if there is a better option. From the picture above, it looks like the impeller housing is used and I do not want to ruin the housing incase I want to change back to its original configuration.

 

[pheel]

<a href=showthread.php?s=&postid=7752872#post7752872 target=_blank>Originally posted</a> by dngspot
It is mentioned that the Dumas props have too much pitch or are to big for the 802. Ball has had good results with Great Planes Sidwinder prop. It is 1.5".

I know but it sucks to use a bigger pump to run a smaller prop and I'm still not able to reverse it with the stop (it doesn't come out !)

If you find a solution to the stop, please I'd like to know.

 

[tgunn]

<a href=showthread.php?s=&postid=7743308#post7743308 target=_blank>Originally posted</a> by sir_dudeguy
ya thats what i was picturing..just make sure the prop is extended far enough out so i can put enough holes/gaps/whatever behind it
and you said you did ro/di hose...is that the same as airline tubing? i'm gonna try and get by w/buying nothin..besides the prop and maybe the pvc.

I think it's pretty much the same idea; it's the opaque plastic tubing you usually use to hook up an RO/DI system. But the airline tubing would work fine too. I really was only using it to couple between the magnet and the "shaft" I build for the prop..

Tyler

 

[tgunn]

<a href=showthread.php?s=&postid=7743519#post7743519 target=_blank>Originally posted</a> by MinibowMatt
I would be worried using the silicone tubing on the impeller to hold the prop will cause undue wear on the impeller and quick burnout. the reason the maxijet mods have the front brace is to keep everything cenetered, and not allow the magnets to rub the sidewalls, causeing wear and chatter. You may want to consider using some type of rigid material so the prop stays centered. JMO...

Keep in mind the aquaclears have a metal center rod that prevents the magnet from hitting the sides. I was only using the flexible tubing to couple the impeller and shaft for the prop. But perhaps a rigid tube would be a better idea anyways; it'd prevent the prop from being able to wobble so much.

Tyler

 

[tgunn]

<a href=showthread.php?s=&postid=7744294#post7744294 target=_blank>Originally posted</a> by pheel
tgunn,

have you succeeded to do make a stopper on the Aquaclear/Hagen ? It doesn't seem to work with my 802, it looks like the magnet is too heavy or something like that cause it doesn't come out. To make it worse, with Dumas 1.75" the pump starts always backward. With a 1.25" it seems to be 50/50. I'm about to give up and start the MJ mod.

pheel

HMM, with my 301 I haven't actually built the shroud and stopper yet; I just held it underwater myself and kept my finger a tiny bit forward of the prop before starting it up. It usually starts in the right direction, but one time it started and hit my finger presumably because it was going the wrong way. It proceeded to work properly.

I think the magnet in the 301 must be weaker; don't see a problem getting the stopper to go.

I may end up modding a maxi 1200 instead of an 802; I've been reading more and more problems getting the 802 to work; it doesn't seem quite so rock solid.

Tyler

 

[dngspot]

What I have read is the 802 starts up backward with the Dumas prop over and over again. I haven't heard much about the Great Planes Sidewinder prop being a problem. The first guy to seem successful, Ball, had to shave down the trailing edge of his first prop to get it to work. He also found the Sidewinder prop. He may not be the first but is the first that I know of.

I have cut the 2 inch opening of the reducer that I mentioned earlier. The cut is deep enough and far in from the opening to allow the locks on the main body, that hold the impeller housing to work. I used my table saw and set the fence about 1/8 from the blade. With the thickness of the blade the rim is cut to about 1\16 of an inch. This is just thick enough to cause a drag on the locks and keep the reducer locked into place and centered, but the inner diameter of the coupler is bigger than the outer diameter of the raised boss on the pump housing. The boss on the pump will not center the new impeller housing, but this is not important as it is with the Maxi’s. The Maxi’s have a floating impeller. I will attach pictures later.
David

 

[dngspot]

I must say, be careful with power tools. I am an experienced mechanic. I have been one for over 25 years. Wile working on my shrouds, on the miter saw, it got caught and flipped out of my hands. No injury, but it scared the sin out of me. .
When this happened, it ruined an all but finished shroud. Again when I finish I will have pictures on how it is done.
David