I Removed a old box that was screwed into my baseboard in my dinning room. It looked to be the original doorbell to the house, I unscrewed it from the wall and cut the wires. Two days later my wife tells me that the doorbell isn't working. Could this old doorbell have been still connected to the new one. And when the wires was cut it broke the circuit.
Chances are very good that the new doorbell uses the old wires and you killed the doorbell by cutting the wires.
It is not common for doorbell components or accessories to be mounted low down on the wall such as on a baseboard.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.