... we still give OEM service to TFI Company on 150 set of mud pump between 2008-2010.F -1300, F-1000 series have ... process, why do grinding on the mud pump, the following reasons:1. Done grinding process on mud pump, when running, performance is more stable ... are expensive, still a lot of customers like to purchase.Mud pump market competitive like fire, fewer manufacturers have conducted careful grinding ...