Changing a Taco Circulator:

I found that the pump was bad on this Peerless boiler. So Now I will show you how to replace a Taco 007 circulator Pump. Make sure the power is off. You can't trust the switch at the boiler and breakers and fuses are almost always marked wrong. test the wire it's self to be sure the power is really off.


This is the old one, See all the rust along the back of it. The boiler needs to be drained first, so turn off the valve that supplies water to the boiler

Taco Circulator

Then hook up a hose to the drain at the bottom of the boiler. On this boiler it is on the right side but some of them are in the back where you can't reach them. What a pain this can be.

Taco 007 Circulator Now that the water is drained. you will need two wrenches 1 5/8" ant the other 11/16" most pump bolts are this size. Sometimes the bolts will not come loose and you have to cut them off. And in this very tight working area that can be very hard.  Once again, If you don't fully understand what I am saying, Stop And call Plumbing And Heating professional.
taco_007_circulator  With the two wrenches loosen and remove all 4 nuts and bolts. then lift up on the pipe a little and pull the pump out.

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 Remove the screw remove the wire cover. Again Make sure the power is off. there are only two wires one black and one white or yellow. remove the 2 wire nuts. they should just un screw

p17.jpg (29096 bytes) Remove the wire guide And through the old pump away.






p19.jpg (14786 bytes) Taco 007 Pumps Have a direction of flow. Indicated by the arrow stamped on the back of the pump As a rule of thumb the pipe that goes into the boiler at the lower point is the return line and you want to pump the water from the house to the lower part of the boiler. In this case you want the arrow facing down Because the pump in on the return pipe of the boiler.

p21.jpg (22709 bytes)   Another problem, The old pump had the power supply box on the right (with the arrow pointing down But the new one has it on the left I can not install it this way because there will be no way to get to the power box with out removing the pump. So I have to spin the motor.                          

p22.jpg (22382 bytes)  There are 4 little bolts on the front of the pump remove all 4 then turn the head 180 % and pump the screws back make sure to tighten them down evenly

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Now it is facing the right way

p25.jpg (25215 bytes) Now put the wire guide on the new pump and tie the black wire to the yellow wire in the pump and the white or yellow wire to the white wire in the pump put the wire nuts back on Make sure they are tight and no wire strands are showing. put the cover back on and put the screw in.

p26.jpg (21443 bytes) Now put the rubber washers between the pump flanges make sure they do not get pinched and put the 4 nuts and bolts back and snug them up good but don't make them too tight and don't tighten one side more then the other. Now you have to fill the system with water and make sure you don't have any leaks. Then you will need to get the air out of the system

p8.jpg (20017 bytes) This is for gas fired boilers only I will be adding oil fired soon.

p9.jpg (18061 bytes) How do I know, If it is my pump that is bad? This is not a simple question. because allot of things could be the cause of a pump not running. and there can be many other reasons that you don't have heat. This may be mush more then you should try to do on your own. Maybe you should call a Pro. Thanks to for this info.