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Repairs
9.
Tapered roller bearings and axial needle bearings shall be greased in the split condi-
tion.
10.
The bearings must not be completely filled with grease. However, if space is
available beside the bearing fitting, the bearing may be totally filled with grease
when mounted, as surplus grease will be thrown out from the bearing when the
robot is started up.
11.
During operation, the bearing should be filled to 70-80% of the available volume.
12.
Ensure that grease is handled and stored properly, to avoid contamination.
1.3.2 Seals
1.
The commonest cause of leakage is incorrect fitting.
Rotating Seals
2.
The sealing surfaces should be protected during transport and mounting.
3.
The seal should be kept in the original wrappings or be well protected.
4.
Sealing surfaces must be inspected before mounting. If scratches or damage are
found, that may result in future leakage, the seal must be replaced.
5.
Seals should also be checked before mounting to ensure that:
• there is no damage to the sealing edge (feel with a fingernail)
• the seal is of the correct type (provided with cutting edge)
• there is no other damage.
6.
Grease the seal just before fitting it, but not too early as there is a risk of dirt and
foreign particles adhering to the seal. The space between the dust tongue and
sealing lip should be filled to 2/3 with grease of quality 3HAB 3537-1. The rub-
ber coated external diameter must also be greased.
7.
The fitting of seals and gears must be carried out on clean workbenches.
8.
Mount the seal correctly. If it is misaligned, there is a risk of leakage due to the
pumping effect.
9.
Always mount the seal with a mounting tool. Never hammer directly on the seal,
as this may result in leakage.
10.
Use a protective sleeve for the sealing lip during mounting, when sliding over
threads, keyways, etc.
Product Manual IRB 6400R
General Description
7
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