Can I just replace the motor on a jet pump?
#1
07-03-07, 09:54 PM
Can I just replace the motor on a jet pump?
I have a diamond 1/2 HP jet pump set up for deep-well operation.
The model number is CJT50.
A couple of days ago it became very noisy. I assume the rear bearing in the motor is starting to go - pump is actually fairly new.
But tonight the pump quit completely. Motor blew the fuse.
Question - Is it possible to replace just the motor on the pump rather than the whole pump. It would save me disconnecting all the plumbing, priming the system etc.
I would get the identical motor, but I'm not sure exactly how the motor is mounted to the pump and if there are any seals I need to worry about.
The model number is CJT50.
A couple of days ago it became very noisy. I assume the rear bearing in the motor is starting to go - pump is actually fairly new.
But tonight the pump quit completely. Motor blew the fuse.
Question - Is it possible to replace just the motor on the pump rather than the whole pump. It would save me disconnecting all the plumbing, priming the system etc.
I would get the identical motor, but I'm not sure exactly how the motor is mounted to the pump and if there are any seals I need to worry about.
#2
07-04-07, 01:19 AM
Yes you can. Here is the website for Diamond Pumps:
http://www.diamondpump.com/jets/thermaxconvjet.html
You will have to find your local distributor via the website as they do not sell directly.
http://www.diamondpump.com/jets/thermaxconvjet.html
You will have to find your local distributor via the website as they do not sell directly.
#3
07-04-07, 07:27 AM
That square flanged motor looks pretty standard. The tag on the motor should give you a frame size. It will same something like Fr. 48Y. Get a motor that matches whatever the other motor says.
You'll need to get a new mechanical seal also.
A local pumphouse should be able to match up motor and seal for you.
Ron
You'll need to get a new mechanical seal also.
A local pumphouse should be able to match up motor and seal for you.
Ron
#4
07-04-07, 08:36 AM
You still need to disconnect all the plumbing. You can't remove the motor without taking the impellar off the front end which requires dismantling the pump and plumbing.
#5
07-04-07, 11:17 PM
Originally Posted by joed
You still need to disconnect all the plumbing. You can't remove the motor without taking the impellar off the front end which requires dismantling the pump and plumbing.
I was hoping that the motor and pump were two different units just coupled somehow and that I could just remove and replace the motor and not touch the plumbing at all.
#7
07-05-07, 09:41 AM
All the jet pumps I have seen(not that many) have the pump end cap of the motor as part of the pump housing. You can't remove the motor without dismantling pump. The impellar is screwed to the end of the motor shaft and needs to be removed before the pump will come apart. You might be able to leave the plumbing connected but you will need to reprime the pump.
I'm sure that there are probably some pumps where this isn't required.
I'm sure that there are probably some pumps where this isn't required.
#8
07-05-07, 10:50 PM
Thanks for the information so far.
I was going to bite the bullet and just get a new pump, but Home-Depot was out of stock and the other place only had a cast iron one which I don't want because they rust too fast.
The pump-room is underneath the front step of the house and is somewhat damp.
So now I'm back to see if I can fix this one, I'll check with a Pump place in the morning to see what they say about removing the motor without removing the pump part.
One tidbit of info I got tonight is that GSW-Diamond is a lousy brand and the pump places don't even carry them any more because they have too many problems with them.
I was going to bite the bullet and just get a new pump, but Home-Depot was out of stock and the other place only had a cast iron one which I don't want because they rust too fast.
The pump-room is underneath the front step of the house and is somewhat damp.
So now I'm back to see if I can fix this one, I'll check with a Pump place in the morning to see what they say about removing the motor without removing the pump part.
One tidbit of info I got tonight is that GSW-Diamond is a lousy brand and the pump places don't even carry them any more because they have too many problems with them.
#9
07-06-07, 09:32 AM
Called the plumbing place this morning.
They assured me I can remove the motor from the pump housing and leave all the plumbing connections intact - except of course the small pipe going to the pressure switch.
So I tried it and sure enough.
You take out the four large bolts that fasten the motor to the pump body and the motor with the impeller attached slides right out towards the back.
So no disassembling the hoses to the pump or the impeller on this model. Five minute job to do this - I spent a lot more time agonizing what to do and what was possible.
They assured me I can remove the motor from the pump housing and leave all the plumbing connections intact - except of course the small pipe going to the pressure switch.
So I tried it and sure enough.
You take out the four large bolts that fasten the motor to the pump body and the motor with the impeller attached slides right out towards the back.
So no disassembling the hoses to the pump or the impeller on this model. Five minute job to do this - I spent a lot more time agonizing what to do and what was possible.
