Weekly maintenance of grout pumps Words: Todd FergusonTo assure you grout pumps stay in check, Todd Ferguson, international product manager for Airplaco, offers the following maintenance tips: Service the engine according to engine manual specifications Check the complete hydraulic system for leaks, worn out hoses, etc. Clean the engine and hydraulic cooling system Drain the water box and clean it out thoroughly Check the piston cup seals for grout leakage Make sure the main shaft bearing and tailpipe housing are properly greased Check the wear plate-to-wear ring for signs of extensive wearing.