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1. HANDLING

The product has to be kept packaged as long as possible. The handling of the Cassette has to be careful in order to avoid contamination and damaging. Do not dirty static sealing with fat.

2. PREPARATION OF THE HOUSING BORE AND THE SHAFT

During the preparation of the housing bore and the shaft please stick to the instructions below (see Picture 2).

HOUSING BORE : in order to reduce the fitting force, if necessary, cover the surface of the outer ring with some oil. For those rings which have the outer surface made of steel only, it is possible to employ a dope such as LOCTITE 480 or 645, but be careful, you have to avoid that the dope dirties the sealing lip.

SHAFT : the surface of the cassette sleeve and of the shaft has to be free from oil. If necessary, it is possible to use a mixture of water and alcohol.


3. ASSEMBLY TOOLS

Two possible assembly procedures are explained in the following paragraphs: each procedure requires the appropriate fitting device. An oil-pressure machine can be useful for the assembling procedure.

CASE A :
The sleeve comes into contact with the inner ring of the bearing. This procedure is the best one (of course depending on the design). By means of an adequate assembly tool (see Picture 5) it permits to maintain a play between the sealing ring and the sleeve at the end of the assembly, as well as a substantial reduction of internal friction and, as a consequence, of temperature and power loss.

ATTENTION : For this procedure ask for advice about the dimensions of the assembly tool to a FREUDENBERG technician.

CASE B : if case A is not possible




CASE A : The characteristics of the assembly tool have to meet following requirements
Picture 3 : The assembly tool leans on the sleeve k

DAMAGE
Picture 4 : The assembly tool has got mechanical stop on the housing, but it causes the squashing of the sleeve k
DAMAGE
RIGHT ASSEMBLY Picture 5 : The assembly tool comes into contact with the housing without leaning on the sleeve k.
The contact of the sleeve on the inner sleeve of the bearing guarantees the disassembly


CASE B : The characteristics of the assembly tool have to meet following requirements
Picture 6 : The assembly tool leans on the sleeve k

DAMAGE
 Picture 7 : The assembly tool has not mechanical stop on the housing
DAMAGE
RIGHT ASSEMBLY Picture 8 : The assembly tool comes into contact with the housing and the force acts on the outer ring j


4. ASSEMBLY PROCEDURE


CASE A
Picture 9



CASE B
Picture 10



CASE C : PTFE CASSETTE SEAL FOR ENGINE APPLICATION
This Cassette Seal type needs an assembly into housing and on shaft at the same time
Picture 11 : Toll pushes on sleeve and outer ring but it has not a stop
DAMAGE
 Picture 12 : Toll pushes only on sleeve

DAMAGE
 Picture 13 : Toll pushes only on outer ring

DAMAGE



RIGHT ASSEMBLY Picture 14 : Tool pushes together sleeve and outer ring and it has a stop on housing