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Before any disassembly, make sure that the pump has been
drained, and take all the necessary precautions to prevent it
from starting up. The pump must not start up, even acciden-
tally.
Uncouple the pump by removing the coupling sleeve.
Remove the pump mounting screws.
Place it on a workbench or on a flat surface free from obstruc-
tions.
Dismantling :
• Remove the key
508
.
• Carefully clean the shaft end with emery paper no. 320
to remove any trace of paint, oxidation, burrs, etc.
• Loosen the 4 screws
723
.
• Remove the cover
705
, taking care not to damage the
lip seal
707
.
• Remove the circlips
537
.
• Remove the washer
731
.
• Remove the balls bearing
703
using the extractor :
pass the grippers behind the balls bearing while sliding
them into the holes of the strainer
725
, using the shaft
end
501
as a support.
• Keep the washer in place
731
.
Reassembly :
• Check that the washer
731
is pressed against the shoulder
of the shaft
501
.
• Couple the balls bearing
703
on to the shaft by hand
(see § GREASING OF THE BALL BEARING).
• Push it on with a sleeve until it comes to bear against
the washer
731
. In no case must the balls bearing be
pushed on to the shaft without support for the shaft
501.
FAILURE TO FOLLOW THIS PROCEDURE CAN SERIOUS-
LY DAMAGE THE INTERIOR OF THE PUMP.
• Place a second washer
731
against the balls bearing
703
.
• Fit the circlips
537
.
• Check the lip seal
707
and change it as necessary.
• Clean the sides of the cover
705
and of the strainer
725
with a clean rag.
• Fit the lip seal
707
in the cover
705
, with the lip facing
inward.
• Fit the cover
705
on the strainer
725
.
• Screw the 4 screws
723
.
• Check that the pump rotates freely when turned by hand.
• Put the pump back on the installation.
• Replace the pump mounting screws.
• Couple the pump by placing the coupling sleeve.
• Check the pump alignment (see § ALIGNMENT OF
MOTOR/PUMP AND REDUCTION GEARBOX/PUMP
SHAFTS).
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NT 1008-C00 07 18 P BA series e
7. CHANGING THE BALL BEARING (continued)