Fitting New Bearings And Seals - ABB IRB 1400 Product Manual

4 Repair

4.1.4 Fitting new Bearings and Seals

4.1.4 Fitting new Bearings and Seals
Bearings 1. Do not unwrap new bearings until just before assembly, in order to prevent dust
2. Make sure that all parts of the bearing are free from burr dust, grinding dust and
3. Bearing rings, races and roller parts must not under any circumstances be sub-
Tapered Bearings 1. The bearing should be tightened gradually until the recommended pre-tensioning
2. The roller parts must be rotated a specified number of turns both before
3. The above procedure must be carried out to enable the roller parts to slot into the
4. It is important to position the bearings correctly, because this directly affects the
Greasing 1. Bearings must be greased after they are fitted. Extreme cleanliness is necessary
Bearings
2. Grooved ball bearings should be greased on both sides.
3. Tapered roller bearings and axial needle bearings should be greased when they
4. Normally the bearings should not be completely filled with grease. However, if
5. 70-80% of the available volume of the bearing must be filled with grease during
6. Make sure that the grease is handled and stored correctly, to avoid contamination.
Seals
The most common cause of leakage is incorrect mounting.
Rotating Seals 1. The seal surfaces must be protected during transportation and assembly.
2. The seals must either be kept in their original packages or be protected well.
3. The seal surfaces must be inspected before mounting. If the seal is scratched or
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and grit getting into the bearing.
any other contamination. Cast parts must be free from foundry sand.
jected to direct impact. The roller parts must not be subjected to any pressure that
is created during the assembly.
is attained.
pre-tensioning and during pre-tensioning.
correct position with respect to the racer flange.
service life of the bearing.
throughout. High quality lubricating grease, such as Shell Alvania WR2
(ABB's art. No. 3537-1), should be used.
are split.
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.
operation.
damaged in such a way that it may cause leakage in the future, it must be
replaced.
3HAC021111-001 Revision: B