Oilgear Hydraulic Pump Repair

Repair experience with Oilgear hydraulic pumps

American Gearbox Repair repairs and rebuilds Oilgear axial piston pumps — the high-pressure hydraulic pumps used on forging presses, steel mill equipment, extrusion presses, injection molding machines and other heavy industrial hydraulic systems. Our repair experience covers Oilgear variable-displacement piston pumps, their rotating groups, swashplate controls and the pressure-compensator assemblies that regulate their output.

Please note: we are not an authorized dealer or authorized service center for Oilgear. We repair Oilgear equipment based on our repair experience, using careful inspection, measurement and rebuilding practices developed over years of working on high-pressure hydraulic pumps.

Oilgear pumps run at very high pressures, so clearances inside the rotating group are measured in thousandths of an inch. A pump that has lost pressure or flow is usually telling you something specific — worn pistons, a scored valve plate or a tired compensator — and we find it before we quote the repair.

Common Oilgear pump problems we fix

• Loss of pressure or flow — worn pistons, piston shoes and cylinder bores letting high-pressure oil slip past
• Valve plate scoring — scored or grooved valve plates causing noise, heat and poor efficiency
• Swashplate and cradle wear — worn swashplate bearings and control pistons making displacement erratic
• Compensator failure — sticking or worn pressure compensators causing pressure spikes or no pressure at all
• Bearing and shaft seal failure — worn drive-shaft bearings and leaking shaft seals
• Contamination damage — dirt or metal particles scoring precision surfaces throughout the rotating group