n
Sealing compound must be applied thin and evenly on the cor-
responding surfaces; take care that the compound does not
enter into oil galleries or blind threaded bores.
n
Examine the contact faces for scratches and burrs, remove
these with a fine file or an oilstone; take care that no grinding
dust and dirt enters into tapped bores or enclosed components.
n
Blow out lines, ducts and gaps with compressed air, replace
any O-rings and seals that have been dislodged by the com-
pressed air.
1.
Lubricate sealing lips (2) with clean grease; in case of double
seals fill the space between the sealing lips with a generous
amount of grease.
2.
Slide the seal over the shaft, with the lip facing towards the
fluid to be sealed.
NOTICE!
Use an assembly sleeve.
If possible, use an assembly sleeve (1)
to
protect the lip from being damaged by
sharp edges, threads or splines.
If no
assembly sleeve is available, you should use
a plastic tube or adhesive tape to prevent the
sealing lip from being damaged.
3.
Lubricate the outer rim of the seal (3) and press it flat on the
housing seat.
4.
Press or knock the seal into the housing, until it is flush with
the housing surface.
NOTICE!
Use an assembly bell.
If possible, use an "assembly bell" (1 ), to
make sure
that the seal will not skew.
In
some cases it may be advisable to assemble
the seal into the housing first, before sliding it
over the shaft. Under no circumstances
should the full weight of the shaft rest on the
seal.
If you have no proper service tools at hand,
use a suitable drift punch with a diameter
which is about 0.4 mm smaller than the outer
diameter of the seal. Use VERY LIGHT
blows with the hammer if no press is avail-
able.
Assembly of radial seals
Fig. 32
Fig. 33
General – Maintenance and repair
BC 672 RB-4 / BC 772 RB-4 / BC 772 RS-4 / BC 772 EB-4
49
