cancelled or specifications alerted. Also over production could play into this. The surplus pumps and parts are usually very cheap and are substantially discounted.
Parts -

Original equipment spare parts are often more than a simple ‘new for old’ replacement. Our commitment to continuous improvement often allows us to supply replacement parts with enhanced performance over the original. Quality spare parts are at the heart of innovative new hydraulic and mechanical designs or sealing solution retrofits that extend equipment life and reduce maintenance costs. Ensuring a surplus supply of critical parts is essential.

Repairs -

Users of rotating machinery require equipment to be repaired quickly, to a high standard and at reasonable cost. One needs to ensure rapid turn around, high quality repair services. Operators should be able to put repaired equipment into service confident in the knowledge that it is ‘good as new’. No matter how simple or complex the machine, regardless of the OEM, you should strive to be ready to respond to your needs 24/7.

Maintenace contracts for serveral pumps could be combined to get some deals and discounts, ensuing a lower price. 

Work on increasing the efficiency of Pumps - The performance, efficiency and eco friendliness of retrofitted pumps can deliver improved performance, lower CO2 emissions and considerable power savings. One needs to look at the total cost of ownership in the operation of the pump systems where downtime is also minimized.