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Thread: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

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    les_garten's Avatar
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    Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    OK, the cool pictures thing was to cruise for readers!

    But we do have PIX, just not sure how cool they are!

    I took apart my Pentair Pump today to put in the gasket kit and I knew I had a hosed Seal Plate.

    I didn't expect the motor mount to be screwed. The top pic, you can see where the mount broke(powdered) while taking the bolt out. I had to use vice grips to hold the mounting ferule that had long since broke out of the seal plate. I had the 2 on the bottom totally disintegrated as you can see on the seal plate. One of the motor mounts on the top is cracked. I didn't shoot a pic of it because I was crying too much!

    It is a marathon motor. I have the screws that attach the mount mount soaking in Kroil Oil now.

    So my question is, should I waste time soaking the mounter mount nutz in the hope I can get the Motor Mount and freshen up the brushes and commutator in the pump by my pump rebuilder.

    Mainly a Motor Mount question.

    http://www.turbonet.biz/misc/Pool/P1010790.JPG
    http://www.turbonet.biz/misc/Pool/P1010791.JPG

    p.s. I think the reason why all this happened is that this pump circumference is smaller than the OEM pump. That makes it where the pump does not sit on the support cradle like it should, it hangs. This caused the whole deal to be under stress and vibration.
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    That stress and vibration could have caused your suction leak - cracked something somewhere. Can you rig up a support for the motor?
    15,600 Gallon, 16' x 32' In-Ground Vinyl Pool
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    8 gallon Liquidator, Aquatherm EcoSun Solar Panels, 2 wheel ThePoolCleaner

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    no-mas's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    Quote Originally Posted by carlscan26
    That stress and vibration could have caused your suction leak - cracked something somewhere. Can you rig up a support for the motor?
    Agree - a shim of some sort to support the motor.
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    les_garten's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    Definitely going to fix the motor hanging problem.

    Does anyone know if you can repair the motor with just a new motor mount?
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
    Kreepy Krauly Classic <<>> Pentair 320 Feeder

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    les_garten's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    Quote Originally Posted by carlscan26
    That stress and vibration could have caused your suction leak - cracked something somewhere. Can you rig up a support for the motor?

    I don't think so, but perhaps

    The Volute of the pump is bolted down. 3 of the 4 ferrules were broken in the seal plate. It was truly amazing that the motor/impeller had not shucked itself. You could move the tail of the motor quite a bit in the vertical and horizontal planes.

    I thought I would get it fixed today and the motor bounds just crumbled.
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
    Kreepy Krauly Classic <<>> Pentair 320 Feeder

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    no-mas's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    When I replaced my motor last year, I wasn't careful enough and ordered the wrong size motor... electrically it was correct, but the housing was too small. Fortunately, the rubber shim shown in the picture was included so that the motor is properly supported instead of hanging over the mount. Don't know exactly what it's called, but maybe this helps...

    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    les_garten's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    Thanx for the PIC. On the parts breakdown there is an almond insert and a black insert. I couldn't find anything about which to choose. But it seems that the almond may be for the Pentairs, and the black for all the other black pumps out there, like mine and yours. I need to find something appropriate to pad it with.
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
    Kreepy Krauly Classic <<>> Pentair 320 Feeder

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    Mod Squad Bama Rambler's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    There was a topic a few days ago about where a guy replaced one frame size motor with a different one and found out that they make two different mounts so either motor can be used. They may have gotten the wrong mount for your motor.
    Dave J. TFP Moderator
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    les_garten's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    OK,

    So after hitting a few motor repair places,nobody has the Square Flange mount for replacement for this Marathon Electric motor. The company also does not sell parts for it.

    I need to replace the motor.

    I have a 12,000 gal pool. It has 4 returns and a waterfall gadget. Has 1 skimmer, 2 drains, and a separate cleaner suction line. A pentair 36 sq ' DE filter

    I am looking to add solar in the near future, perhaps 8-10 48 sq ' panels requiring 5 gpm. I will probably do an Intelliflo VF around then also.

    But in the meantime, I would like a motor that would so this in the short term and to keep as a spare.

    The current motor is a 1 HP and a SF of 1.25.

    What would happen it I put a 1 1/2 motor with a 1.47 SF in here with the same impeller? Or with the correct impeller?

    Would it hurt anything.
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
    Kreepy Krauly Classic <<>> Pentair 320 Feeder

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    Mod Squad Bama Rambler's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    As long as the motor is larger than the impeller is rated for you're fine. However, going with a larger motor without changing the impeller gets you nothing.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    les_garten's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    Quote Originally Posted by Bama Rambler
    As long as the motor is larger than the impeller is rated for you're fine. However, going with a larger motor without changing the impeller gets you nothing.
    I guess they spin their RPM and that's it?

    But I would have the option of going to a 1.5HP impeller and a 2HP impeller, is that correct?

    Would longevity be better or on the bigger motor?
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
    Kreepy Krauly Classic <<>> Pentair 320 Feeder

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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    The motor should be matched to the impeller or slightly larger. If the motor is too big, then it is not running in the best efficiency range of its head curve. If the motor is too small, it will be overloaded and will fail prematurely.

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    les_garten's Avatar
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    Re: Pentair Whisperflo Cracked Motor Mount - Cool Pictures!

    It takes a while to pick up the "Motor Lingo" hype stuff.

    So I think I'll look at the Impellers that come with various combos at Pentair.

    I have a 1HP/1.25SF currently and it is not original.
    I may look at 1HP/1.65SF

    I'll see what impellers that come with these. Is it possible they use the same impeller?

    These are both offered from Pentair.
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
    Kreepy Krauly Classic <<>> Pentair 320 Feeder

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