3.3.4 Inspecting the oil level, axis 4 gearboxLocation of axis 4 gearboxThe axis 4 gearbox is located in the upper armhouse. The oil plug is shown in thefigure.xx0800000307Oil plug, for filling and drainingARequired equipmentNoteEquipmentSee section Type of lubrication in gearboxeson page 151.Lubrication oilContent is defined in section Standard toolson page 383.Standard toolkitThese procedures include references to thetools required.Other tools and procedures may be required.See references to these procedures in thestep-by-step instructions below.Continues on next page132 Product manual - IRB 26003HAC035504-001 Revision: G© Copyright 2009-2015 ABB. All rights reserved.3 Maintenance3.3.4 Inspecting the oil level, axis 4 gearbox