Leaking Hoover WDM120?

Our WDM 120 is leaking from what appears to be the front left side of the machine (soap dispenser side). We have replaced all hoses and the pump but it's still leaking. There is no water on the outside of the machine, the leak is on the inside. The problem was first noticed when the pump stopped and it became evident that water had been leaking into the pump over a long period.