Once washer fills to proper level and wash cycle begins, there is a loud hammer and jerk of discharge hose as water is released for 1-2 seconds, then water stops discharging, then five seconds or so later it happens again. It continues to do this throughout wash cycle if I were to let it run. if I turn selector knob to drain position, it drains no problem. This only happens during wash cycle. Any help is greatly appreciated.

I know its laughable I am trying to save this washer, but it is a secondary washer in basement and its like an old war horse, stable as can be. I hate to chuck it. So I'm guessing the timer is sending signal to open or close pump contacts? I am an electrician and saw no feed for pump on schematic. Thanks for your imput, let me know if timer regulates this for sure, otherwise it will have to be time for it to go. They dont build them like this anymore, everything is solid and no electronic controls, I would love to save it. Thanks again