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 148.Lubrication oilContent is defined in section Standard toolson page 341.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.Inspecting the oil level, axis 4 gearboxUse this procedure to inspect the oil level in the axis 4 gearbox.NoteActionWARNINGHandling gearbox oil involves several safetyrisks. Before proceeding, please read thesafety information in the section WARNING- Safety risks during work with gearbox lub-ricants (oil or grease) on page 55.1Continues on next page126 3HAC033453-001 Revision: H© Copyright 2009-2013 ABB. All rights reserved.3 Maintenance3.3.4 Inspecting the oil level, axis 4 gearbox