4.7.2 Service work on gearboxes, axes 3, 4, 5 and 6Gearboxes, replacementThe gearboxes of axes 3, 4, 5 and 6 are intended to run without requiring anyrepairs or maintenance work. This implies that they must under no circumstancesbe opened or serviced.If the gearboxes require replacement:• axes 3 and 4: the complete upper arm is to be replaced. This procedure isdetailed in section Replacing the complete upper arm, IRB 1600 on page 183.• axes 5 and 6: the complete wrist unit is to be replaced. This procedure isdetailed in section Replacing the wrist unit, IRB 1600 on page 201.Product manual - IRB 1600/1660 3353HAC026660-001 Revision: W© Copyright 2006-2018 ABB. All rights reserved.4 Repair4.7.2 Service work on gearboxes, axes 3, 4, 5 and 6
