Pag.23 (Funct. and Maint.Manual n.03 – Fourth edition) OMI.EN-PCP001 R01
If the pump is equipped with this kind of joint, intake of fluid from the outlet is not possible
(only counterclockwise rotation is allowed).
This kind of joint has no spare parts available. In case of malfunctioning it shall be fully
replaced.
9.3.5 Joint type SN4
This type of joint shall be almost completely disassembled to be removed from the rotor.
Follow these steps:
1. Remove the two clamps (08) that holds the sleeve.
2. Force the rubber sleeve backwards (09) in the direction of the black arrow.
3. Remove the internal flat sleeve (10) by operating on the larger part, then move it in
the direction of the black arrow.
4. Remove the grub screw (11).
5. Move the metallic cover (12) backwards in the direction of the arrow. The bushes
and pin (13) will be visible.
6. Beat the pin with care, taking care not to damage the bell (14). Then, if necessary,
the pin and the bushes can be replaced.
7. Pull the sphere in the direction of the black arrow. Since it is integral with the
propeller shaft (15), they’ll both be free of the joint. Then, the hexagonal-head
screws that holds the bell to the rotor (or hollow shaft depending on the joint
involved) will be visible.
8. Unscrew the screws (7). The bell will be completely free of the rotor (or hollow shaft,
as mentioned above).
SN4
IMPORTANT: Bushes increase the life of the system but are integral with the pin,
hence when the pin is replaced, they shall always be replaced as well.
To re-assemble the internal flat sleeve (10), it is advisable to grease the sphere and use
two tools simultaneously (e.g. two large screwdrivers).
9.3.6 Joint type SN5
1. Remove the screws (17) on the rotor side. The joint will be free.
2. Take the joint apart from the rotor by moving it in the direction of the black arrow.
