What was the original problem with the washer, leaking water pump?
I did lay the washer on its back during the install.
For future referance here is a video that shows how to change the pump.Drain Pump Replacement Video
It was a bit difficult taking the pump off the motor shaft and putting it back on - tight fit.
The old pump should have been easy to remove and the new pump easy to install onto the motor shaft.
If the old pump was leaking water then the motor shaft may have had rust buildup on it. If that was the case then the motor shaft should have been cleaned up before installing the new pump.
If a new pump is forced onto a rusty motor shaft it can crack the new pump causing the seal to leak.
Ran the 1st load - the drum kept filling up until I stopped it manually with the control.
I would check the air pressure tube that runs from that switch to the side of the tub to make sure it's not pinched someplace.
Let us know what you find or if you have any other questions.
Thanks for posting.