
5.3 Changing the bushing
Dismantling
:
• Extract the ring
407
by pressing it home with a sleve-
tube.
Reassembly :
• Position the front cover
401
vertically on its small side
and insert a dummy
422a
in the place of the disk
422
.
• Mount the ring
407
by pressing the latter home with a
sleeve-tube.
• Take out the dummy disk
422a
and replace the disk
422
.
NOTA :
The side of the ring must be offset by 0,1 mm relative to
the cover disk 422.
5.4 Closing the non-drive side base
For the versions without pushrods, insert the vanes
making sure they are fitted in the right direction (see
detail A).
• Proceed, as necessary, to replace the wearing disk
422
(to remove the old disk, it may be necessary to break it).
• Clean its seating. Take care with the positioning of the
disk. The 3 diameter 4 holes must be opposite the 2
circulation holes of the cover and the pin
423
(P15,
P25, P40 only).
• In this assembly operation, check and replace, as
necessary, the seal
403
and fit it with a suitable lubri-
cant.
• Orient the front cover
401
, pin
423
to the vertical.
• Tighten the 4 screws
410
.
• Tighten the 2 screws
411
into the 2 bosses of the front
cover
401
.
• Check that the pump can be turned freely by hand.
• Replace the cover
712
and its seal
714
(a new one if
necessary).
• Tighten the 3 screws
726
.
See Détail A
Detail A
712
726
21/45
NT 1008-D00 08 18 P BI series e
5. OPENING AND CLOSING THE NON-DRIVE SIDE BASE
(continued)