Varisco S.p.A.
Z.I. Nord - Terza Strada, 9 - 35129 PADOVA – ITALY
Tel.+39.049.8294111 Email: [email protected]
Fax+39.049.8076762 Web: www.variscospa.com
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9.3.4 JOINT TYPE SN3
1. Remove the screws (6) that hold the joint to the rotor.
2. Extract the propeller shaft (6b) in the direction of the black arrow.
SN3
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 hold 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 hold 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.
