ABB IRB1410, Product Manual, Page: 69 / 166

4 Repair
4.1.4 Fitting new Bearings and Seals
3HAC026320-001 Revision: A 67
4.1.4 Fitting new Bearings and Seals
Bearings
Tapered Bearings
Greasing Bearings
Action
1. Do not unwrap new bearings until just before assembly, in order to prevent dust and
grit getting into the bearing
2. Make sure that all parts of the bearing are free from burr dust, grinding dust and any
other contamination. Cast parts must be free from foundry sand
3.
Bearing rings, races and roller parts must not under any circumstances be subjected
to direct impact. The roller parts must not be subjected to any pressure that is created
during the assembly
Action
1. The bearing should be tightened gradually until the recommended pre-tensioning is
attained.
2. The roller parts must be rotated a specified number of turns both before
pre-tensioning and during pre-tensioning.
3. The above procedure must be carried out to enable the roller parts to slot into the
correct position with respect to the racer flange.
4. It is important to position the bearings correctly, because this directly affects the ser-
vice life of the bearing.
Action
1. Bearings must be greased after they are fitted. Extreme cleanliness is necessary
throughout. High quality lubricating grease, such as Shell Alvania WR2 (ABB’s art.
No. 3537-1), should be used.
2. Grooved ball bearings should be greased on both sides.
3. Tapered roller bearings and axial needle bearings should be greased when they
are split.
4. Normally the bearings should not be completely filled with grease. However, if
there is space on both sides of the bearing, it can be filled completely with grease
when it is fitted, as surplus grease will be released from the bearing on start up.
5. 70-80% of the available volume of the bearing must be filled with grease during
operation.