- Joined
- Nov 24, 2017
- Messages
- 64
Hi Everyone,
I went to use my coolant pump on my Hafco HM50 Mill the other day. I have never used it before. The machine is 2nd hand and I always assumed the coolant tank was empty when I bought it. (NOT) When I flicked the switch there was just silence.
As a bit of a background and to make this post slightly more interesting here is what I found when I pulled the pump out.
You can only imagine the gunk in the tank.
This is what is left of the drive shaft. It is almost rusted right through.
After seeing this I decided to see if I could buy a new one.
To my surprise I found what looks like exactly the same model.
This is the id plate on the old motor and the new one is virtually identical.
Now to the problem. I can't seem to figure out where the wires should go on the new motor.
Here is a pick of the original terminal block with the supply wires still connected.
Note there are two blue and two black wires coming out of the conduit.
And the Earth of course.
Note the two lowest terminals have some kind of jumper between them which I assume is a resistor.
The terminals seem to be labeled
Position, Label Connected Wires
===============================
Top Left V1U2 Black and Blue together
Top Right Z2 Blue
Bottom Left 7W1 Black
Bottom RIght 1U No external connection
Here is the wiring block on the new pump.
It has the same 4 labels on the block except it is rotated 90 degrees anti clockwise.
Instead of the small jumper (Resistor?) between the terminals marked 7W1 and U1 it has another component covered in something like resin glued into the cap.
That is the two red wires you can see in this pic.
The old motor appears to have 4 wires coming out of it, where the new motor appears to have only 3.
There looks to be nothing connected from the motor to Z2.
The big question.
Where do I connect the two blue and two black wires so I don't let the smoke escape and my pump doesn't blow bubbles instead of suck
As the black and blue wires from the power supply look otherwise the same I have tied to two that were paired up together in case that make any difference.
Any assistance greatly appreciated.
David.
I went to use my coolant pump on my Hafco HM50 Mill the other day. I have never used it before. The machine is 2nd hand and I always assumed the coolant tank was empty when I bought it. (NOT) When I flicked the switch there was just silence.
As a bit of a background and to make this post slightly more interesting here is what I found when I pulled the pump out.
You can only imagine the gunk in the tank.
This is what is left of the drive shaft. It is almost rusted right through.
After seeing this I decided to see if I could buy a new one.
To my surprise I found what looks like exactly the same model.
This is the id plate on the old motor and the new one is virtually identical.
Now to the problem. I can't seem to figure out where the wires should go on the new motor.
Here is a pick of the original terminal block with the supply wires still connected.
Note there are two blue and two black wires coming out of the conduit.
And the Earth of course.
Note the two lowest terminals have some kind of jumper between them which I assume is a resistor.
The terminals seem to be labeled
Position, Label Connected Wires
===============================
Top Left V1U2 Black and Blue together
Top Right Z2 Blue
Bottom Left 7W1 Black
Bottom RIght 1U No external connection
Here is the wiring block on the new pump.
It has the same 4 labels on the block except it is rotated 90 degrees anti clockwise.
Instead of the small jumper (Resistor?) between the terminals marked 7W1 and U1 it has another component covered in something like resin glued into the cap.
That is the two red wires you can see in this pic.
The old motor appears to have 4 wires coming out of it, where the new motor appears to have only 3.
There looks to be nothing connected from the motor to Z2.
The big question.
Where do I connect the two blue and two black wires so I don't let the smoke escape and my pump doesn't blow bubbles instead of suck
As the black and blue wires from the power supply look otherwise the same I have tied to two that were paired up together in case that make any difference.
Any assistance greatly appreciated.
David.