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NT 1001-F00 10.10 C12 A - C18 A e
10.1 Bypass adjustment
• Remove the plug
833
as well as the seal
832
.
• Using a flat spanner, turn nut
834
clockwise to obtain a
greater pressure (tightening of the spring) or counter-
clockwise to obtain a lower pressure (loosening of the
spring).
• Refit plug
833
and its seal
832
.
10.2 Changing the spring
• Loosen the spring (see § BYPASS ADJUSTMENT).
• Loosen the pressure screw nut
828
of main body
101
taking care to the thrust produced by spring
804
(do not
remove any associated parts).
• Remove the spring
804
.
• Replace spring
804
and carry out reassembly in rever-
se order of disassembly.
10.3 Replacement of the seals
• Loosen the spring (see § BYPASS ADJUSTMENT).
• Loosen the pressure screw nut
828
of main body
101
taking care to the thrust produced by spring
804
.
• Block the unit comprising the pressure screw nut
828
in a vice.
• Using a pin drift, remove pin
831
.
• Remove the nut
834
.
• Remove the screw
826
, the spring
829
, the seal
837
and the washer
838
.
• Replace seals and reinstall in reverse order of disas-
sembly.
NOTICE :
When assembling seal
837
, we recommend covering
the pin hole on shaft
826
with adhesive tape to avoid
damaging the seal.
FAILURE TO RELIEVE SYSTEM PRESSU-
RE PRIOR TO PERFORMING PUMP SERVI-
CE OR MAINTENANCE CAN CAUSE PER-
SONAL INJURY OR PROPERTY DAMAGE.
CAUTION
Hazardous pressure
can cause
personal injury
or property damage.
CAUTION
Hazardous pressure
can cause
personal injury
or property damage.
FAILURE TO RELIEVE SYSTEM PRESSU-
RE PRIOR TO PERFORMING PUMP SERVI-
CE OR MAINTENANCE CAN CAUSE PER-
SONAL INJURY OR PROPERTY DAMAGE.
Spring
Adjustement range
(bar)
C12
C18
C 2,5
0,9 à 2,5
X
X
C 5,5
2 à 5,5
X
C 6,5
2 à 6,5
X
C 8
5 à 8
X
10. BYPASS