pool motor starter cap

[sticks]

Hi all ,

My pool pump has been playing up for a day or two , runs for an
hour or so then shuts down , (overheating)
I have taken motor out and the starter capacitor is ruptured i think it is
60uF 450VAC cant read much else , motor is a 4.3Amp Model LTP750 made bY
ONGA pumps .
My questions are

1. Should i just change starter capacitor and refit
2. What could cause overheat problem ( bearings aside)
3. Do i need exact replacement capacitor

thanks

 

[Richard Bennett]

Quite probably a capacitor failure. If the motor runs both windings are OK
(at least when cold). 60uF sounds very high I would expect about 6.
"sticks" <ksbutler@iinet.net.au> wrote in message
news:41ce65cf$0$14450$5a62ac22@per-qv1-newsreader-01.iinet.net.au...

Hi all ,

My pool pump has been playing up for a day or two , runs for an
hour or so then shuts down , (overheating)
I have taken motor out and the starter capacitor is ruptured i think it is
60uF 450VAC cant read much else , motor is a 4.3Amp Model LTP750 made bY
ONGA pumps .
My questions are

1. Should i just change starter capacitor and refit
2. What could cause overheat problem ( bearings aside)
3. Do i need exact replacement capacitor

thanks

 

[SQLit]

"sticks" <ksbutler@iinet.net.au> wrote in message
news:41ce65cf$0$14450$5a62ac22@per-qv1-newsreader-01.iinet.net.au...

Hi all ,

My pool pump has been playing up for a day or two , runs for an
hour or so then shuts down , (overheating)
I have taken motor out and the starter capacitor is ruptured i think it is
60uF 450VAC cant read much else , motor is a 4.3Amp Model LTP750 made bY
ONGA pumps .
My questions are

1. Should i just change starter capacitor and refit
2. What could cause overheat problem ( bearings aside)
3. Do i need exact replacement capacitor

thanks

Depending on when you last serviced the unit. It could be time to check the
pump, bearings and etc. I toasted my pump a couple of years ago. Took it out
and down to the pool place as I was leaving town (again, work related).
They politely told me that the motor was fixable but the pump was shot. So
no matter what I did to the motor the pump was not going to do the job. For
me it was easier to replace as a unit with new warrantee and be done with
it.

 

[Chas]

"sticks" <ksbutler@iinet.net.au> wrote in message
news:41ce65cf$0$14450$5a62ac22@per-qv1-newsreader-01.iinet.net.au...

Hi all ,

My pool pump has been playing up for a day or two , runs for an
hour or so then shuts down , (overheating)
I have taken motor out and the starter capacitor is ruptured i think it is
60uF 450VAC cant read much else , motor is a 4.3Amp Model LTP750 made bY
ONGA pumps .
My questions are

1. Should i just change starter capacitor and refit
2. What could cause overheat problem ( bearings aside)
3. Do i need exact replacement capacitor

thanks

Don't know the particular motor, but it seems possible that the failed

capacitor is a "run" capacitor which should be constantly in circuit with
the second "run" winding to provide phase shift to that winding. The motor
would be in essence a pseudo two phase motor. Failure of the capacitor
would explain the overheating. The voltage rating of 450v also indicates a
"run" cap, but 60 uf seems a bit high.??

Failure of a "start" cap would mean the motor would not start, just hum &
heat up. I would expect a "start" cap to have a value of 150-200uf & 250v.

Have you considered contacting ONGA or one of their agents?
--
Regards, Chas.


To Email, replace 'xxx' with tango papa golf.

 

[Lord-Data]

"Chas" <umlaut@xxx.com.au> wrote in message
news:41cfd840$1@dnews.tpgi.com.au...

"sticks" <ksbutler@iinet.net.au> wrote in message
news:41ce65cf$0$14450$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Hi all ,

My pool pump has been playing up for a day or two , runs for an
hour or so then shuts down , (overheating)
I have taken motor out and the starter capacitor is ruptured i think it
is
60uF 450VAC cant read much else , motor is a 4.3Amp Model LTP750 made bY
ONGA pumps .
My questions are

1. Should i just change starter capacitor and refit
2. What could cause overheat problem ( bearings aside)
3. Do i need exact replacement capacitor

thanks

Don't know the particular motor, but it seems possible that the failed
capacitor is a "run" capacitor which should be constantly in circuit with
the second "run" winding to provide phase shift to that winding. The
motor
would be in essence a pseudo two phase motor. Failure of the capacitor
would explain the overheating. The voltage rating of 450v also indicates
a
"run" cap, but 60 uf seems a bit high.??

Failure of a "start" cap would mean the motor would not start, just hum &
heat up. I would expect a "start" cap to have a value of 150-200uf &
250v.

Hrm .. sorry to hi-jack the thread a bit, but just curious .. If the starter
cap is gone, would it cause it to start only sometimes?
perhaps failing/damaged but still able to work? Sometimes it starts fine,
sometimes it does exactly what you said above .. humms for a while, then
clicks off from overheating .. then re-tries a few mins later .. If you give
it a flick by hand it will always start going .. and sometimes it starts
fine, othertimes it jams like this ..

Where do you go to get a suitable starter cap if this is the case?

Thanks

Have you considered contacting ONGA or one of their agents?
--
Regards, Chas.


To Email, replace 'xxx' with tango papa golf.

 

[daestrom]

"Lord-Data" <data@ihug.com.au> wrote in message
news:41d23c76$0$3610$61c65585@un-2park-reader-02.sydney.pipenetworks.com.au...

"Chas" <umlaut@xxx.com.au> wrote in message
news:41cfd840$1@dnews.tpgi.com.au...

"sticks" <ksbutler@iinet.net.au> wrote in message
news:41ce65cf$0$14450$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Hi all ,

My pool pump has been playing up for a day or two , runs for an
hour or so then shuts down , (overheating)
I have taken motor out and the starter capacitor is ruptured i think it
is
60uF 450VAC cant read much else , motor is a 4.3Amp Model LTP750 made
bY
ONGA pumps .
My questions are

1. Should i just change starter capacitor and refit
2. What could cause overheat problem ( bearings aside)
3. Do i need exact replacement capacitor

thanks

Don't know the particular motor, but it seems possible that the failed
capacitor is a "run" capacitor which should be constantly in circuit
with
the second "run" winding to provide phase shift to that winding. The
motor
would be in essence a pseudo two phase motor. Failure of the capacitor
would explain the overheating. The voltage rating of 450v also indicates
a
"run" cap, but 60 uf seems a bit high.??

Failure of a "start" cap would mean the motor would not start, just hum &
heat up. I would expect a "start" cap to have a value of 150-200uf &
250v.

Hrm .. sorry to hi-jack the thread a bit, but just curious .. If the
starter cap is gone, would it cause it to start only sometimes?
perhaps failing/damaged but still able to work? Sometimes it starts fine,
sometimes it does exactly what you said above .. humms for a while, then
clicks off from overheating .. then re-tries a few mins later .. If you
give it a flick by hand it will always start going .. and sometimes it
starts fine, othertimes it jams like this ..

That sounds more like a start-cap with a defective centrifugal switch. When
the motor shuts off, if the switch doesn't re-close, the next start will
fail and just 'hummmm'. Manually spinning it will start up the motor. Then
when it shuts off next time, if the switch *does* re-close, it will start
normally.

Some motors have a sleeve that slides along the shaft to close/open the
switch. If that sleeve gets gummed up and doesn't move easily, you get the
symptoms you describe.

daestrom