ABB IRB 6400R, Product On-Line Manual, Page: 300 / 481

Maintenance
10 Product Manual IRB 6400R
2.4 Inspect and lubricate the bearings, balancing units axis 2
The bearings should be inspected and lubricated every 12,000 hours.
1. Move axis 2 to the sync position.
Make sure the shaft between the upper and lower arms does not rotate when
unscrewing the KM nut.
2. Remove the KM- nuts (KM-10), the outer support washers and sealing rings.
Inspect
3. Fit the auxiliary shafts on the upper and lower axes (upper: aux. shaft
3HAB 5276-1, lower: aux. shaft 3HAB 5275-1). The shafts should be tightened to
their bottom position.
4. Off-load the bearings using an M10x50 screw at the cylinder top.
5. Put out the cylinder so that the inner rings are fully exposed. Wipe the inner rings
clean and check that there are no pressure marks or other similar deformations.
It is quite normal for the bearing races to have a darker colour than the surrounding
material.
6. Inspect the support washers and sealing rings.
7. Push in the cylinder, make sure the inner support washers and sealing rings gets in
correct position.
8. Remove the auxiliary shafts.
Lubrication
8. Fit the lubricating tool 3HAC 5222-1. The tool should be tightened to the bottom
position using hand power only.
9. Grease through the nipple. Continue greasing until the grease exudes behind the
inner sealing ring. Repeat procedure for the other bearings.
10. Remove the lubricating tool and clean the threads on the shaft ends free from
grease.
11. Remount the outer sealing rings, apply some grease on the support washers, apply
Loctite 243 on the KM nuts, not on the shafts, and tighten them to a torque
of 50-60 Nm.
12. Check play (min. 0.1 mm) between support washer and bearingseat at both
bearings.
13. N.B. Remove the M10x50 screw.
For more information about the procedure of replacing bearings, see Repairs.