
A - Pump cylinder
B - Bypass
D - PN16
E - Bypass adjustment
F - Cover
H - Shaft seal casing
L - Outboard bearing
P - Pump plate
5.1 Opening the non-drive side base
•
Loosen the 4 screws
410
.
• Loosen the 2 screws
411
and place them in the 2 dia-
metrically opposed tapped holes.
• Detach the front cover
401
of the body by screwing the
2 screws
411
at the same time.
• When the cover is free on the shaft, withdraw it manually
while supporting it.
• Take out the disk
422
.
Wearing carbon disks 422 are only positioned in the
covers, hold them by hand while the dismantling process
is taking place (fragile parts susceptible to shock).
• Unscrew the 3 screws
726
.
• Remove the cover
712
and its seal
714
.
• Check the seals
403
and
714
.
• Check the bushing
407
inside the front cover
401
(see
§ MAINTENANCE).
5.2 Checking the vanes
• Remove a vane
317
situated in an horizontal plane.
• Check it for wear (see § MAINTENANCE). In the case
of abnormal wear, check the state of the body and front
cover faces.
• Replace the vane (with a new one if necessary),
making sure it is fitted in the right direction (see details
below) and making sure it slides properly in its slot.
• By hand, turn the pump shaft to bring the next vane into
a horizontal plane.
Then proceed in the same way for each vane.
Rotor 12 vanes TVP
CAUTION
20/45
NT 1008-D00 08 18 P BI series e
5. OPENING AND CLOSING THE NON-DRIVE SIDE BASE
(continued)