The short note in link gives some key elements on the following questions: What is the cost of maintaining a pump in rural areas? How much does it represent per family user? Is it affordable? How can these contributions be organised and managed at village level?
The main conclusion is that, once a pump is restored to a certain standard, its yearly maintenance is relatively cheap and can, in most of the situations, easily be afforded and managed by the users, providing that some conditions are fulfilled.