OMI.EN-PCP001 R01 (Funct. and Maint.Manual n.03 – Fourth edition) Pag.32
DANGER: During re-assembly, it is necessary to distribute the pressure uniformly
on the fixed ring, to prevent malfunctioning or failures.
9.4.2.3.2 SINGLE MECHANIC SEAL
9.4.2.3.2.1 DISASSEMBLY
1. Disconnext flux piping (if fluxed seal).
2. Remove the motor (see picture A), after unscrewing the grub screw in the thread
(01).
3. Remove the stator and the pump body following the procedure outlined in Chap.
9.3.1 (points 1 and 2).
4. Extract from the support (02) the drive (03) + housing (04) in the direction of the
black arrow.
5. Extract the drive housing slowly, making sure not to damage the seals inside (see
picture B).
6. Remove the separating ring (05), the mobile part of the seal (06) and the fixed part
(07).
WARNING! In bearings-mounted pumps as in the picture above, before inserting
the hollow shaft (08) in the hollow shaft, make sure the grub screw slot on the motor shaft
coincides with the threaded hole (01) in the hollow shaft; then, the mechanic seal will be
correctly positioned. Otherwise, push the propeller shaft until the slot coincides with the
threaded hole of the hollow shaft grub screw.
9.4.2.3.2.2 Re-assembly
1. Check the condition of the seal faces (as well as the O’Rings in some types of seal).
2. Check the condition of the hollow shaft.
3. Clean the hollow shaft, the gland (04) (see picture above) and all involved parts.
4. Clean and oil the motor shaft (Rust jams the shafts coupling, thus increasing the
danger of damage during disassembly).
