Eaton VICKERS Eaton 5423-553 Hydraulic Pump For Concrete Mixer Truck Eaton VICKERS

Eaton VICKERS hydraulic pump for concrete mixer truck Inspect the control valve: Start by thoroughly flushing the control valve with clean solvent. Then blow it dry with compressed air. Be sure to blow through all of the control valve’s internal passages. Inspect the control valve linkage. Move the control lever back and forth; it should move freely without binding. There should be no free play in the feedback link or control lever. Check the control valve orifice; if it is plugged after flushing clean or replace it. Appendix C gives information on orifice replacement

Eaton VICKERS Eaton 5423-553 hydraulic pump for concrete mixer truck Eaton VICKERS

Remove the end cover. Caution: The cylinder barrel spring pre-load will damage the pump’s internal parts if the end cover is removed incorrectly. Start by removing six of the eight bolts that hold the end cover to the pump. Leave two bolts that are directly across from each other tight. Next, loosen the two remaining bolts one or two turns. The end cover should rise as the bolts are loosened. If it doesn’t tap it with a plastic hammer to break the gasket seal. After the gasket seal is broken loosen the bolts gradually and evenly until the cylinder barrel spring preload is relieved. Remove the bolts and lift the end cover from the pump. Be careful; do not drop the valve plate, it may lift away with the end cover.