Before performing any repairs, perform a water test on the pump by raising and lowering the handle a full 40 strokes. A properly performing pump will yield greater than 10 liters.
Remove the hex head bolt from the top of the access door on the pump head.
The following procedure requires two people. If you attempt to do this alone, you risk injuring yourself and damaging the pump.
Lift the pump handle until the base of the chain comes to rest on the spacer collar, and the chain is slack. Hold the handle in this position while the chain is being detached.
The following procedure requires two people. If you attempt to do this alone, you risk injuring yourself and damaging the pump.
The first person will use a hammer to gently tap on the axle punch, to push the axle through the handle bearings and out of the pump head.
At the same time, a second person will hold up the handle, supporting its weight, while twisting the axle with a wrench, to loosen it in the bearings and make it easier to dislodge.