LevelNoteArticle numberSpare partL2Gasket and cassette sealingincludedIRB 6740-240/3.2IRB 6740-220/3.2 LID3HAC077945-003(Graphite White)3HAC077945-004(ABB Orange)Arm house cover including cas-sette sealingRequired service partsNoteArticle numberConsumableUsed on oil plug. Always replacewhen refitting oil plug.3HAC061327-059O-ring, G 1/2"Shell Gadus S23HAC042536-001GreaseLoctite 2400 (or equivalent Loctite243)-Locking liquidMercasol 3110 Waxcoat. Recom-mended drying time is 24h.3HAC034903-001Rust preventiveSee Type of lubrication in gear-boxes on page 135.-Lubricating oilRequired tools and equipmentNoteArticle numberEquipmentFor removing and fitting the armhouse cover, including the axis-4cassette sealing.3HAC079878-001Replacement tool for arm housecoverUsed to support the arm housecover-Screw, M6 x minimum 70 mmContent is defined in sectionStandard toolkit on page 652.-Standard toolkitRemoving the arm house cover including the cassette sealingUse these procedures to remove the arm house cover including the cassettesealing.Preparations before removing the arm house coverNoteActionSee Draining the axis-4 gearbox onpage 153.Drain the axis-4 gearbox.1Continues on next page258 Product manual - IRB 67403HAC085701-001 Revision: A© Copyright 2023 ABB. All rights reserved.5 Repair5.5.1 Replacing the arm house cover including the axis-4 cassette sealingContinued