The lid can be removed, but only slowly and you must do it carefully, without excessive force on the plastic parts. Make sure it's disconnected from the electrical outlet and the water pipes. Firstly, the outlet pipe is a stub pipe fitted through the lid into a rubber pipe inside the unit. Look at it and memorize how it looks, before removing it. It should be removed by gently twisting and pulling. To me, the removal and replacement of the outlet stub pipe is the tricky part. Next, pull the lid sides outwards to release the slots from the body. You may need to use a large bladed screwdriver to gently prize the lid upwards, using those slots. The rubber seal under the lid offers some resistance to the lid coming up. So be patient and do it slowly and evenly. The screws on the side of the box holds the motor assembly in place. These do not attach to the lid, so no need to undo them before lifting the lid. I found re-assembly was easier by wetting the rubber seals with water. That stub pipe was hard to replace, even wet. But silcone grease is probably recommneded and would make it easier to re-assemble. I would double check everything is watertight before putting it into service. My pump ran for seven years with a domestic washing machine before it failed. Taking it apart and cleaning it didn't help as it seems to be an electrical failure. I saw from the internet that the motor starter choke was a weak point, causing the motor to hum instead of running.
Stephen74, November 2012
