Maintenance
INOXPA S.A.U.
20.025.30.01EN · (0) 2019/04
17
8.6. DISASSEMBLY AND ASSEMBLY OF THE AGITATOR
The disassembly and assembly of the agitators should only be carried out by qualified personnel
using only appropriate tools. Ensure that staff read these instructions manual attentively,
particularly the instructions that relate to their work.
Stop the motor from starting up when carrying out assembly and disassembly work on the agitator.
Place the agitator switch in the “off” position.
Lock out the electrical switchboard or place a warning sign.
Remove the fuses and take them to the workplace.
8.6.1. Disassembly of the agitator
Once the motor is disconnected, disassembly work may begin:
Empty the tank.
Remove the propeller (02) that is screwed to the agitator shaft (05) knocking a blade lightly with a plastic
hammer in counter-clockwise direction as seen from the front of the propeller. Take care to retain the O-
ring (80) in the agitator shaft (05).
Remove carefully the two parts of the mechanical seal (08), loosening the allen studs that hold them.
Remove shaft guards (47) together with its hexagonal screws (52B) and flats washers (53B).
Remove the hexagonal screws (52C) from the motor or gear motor and loosen the allen studs (55A) from
the bearing support (70).
Move the motor or gear motor and the agitator shaft (05) backwards, taking care not to hit or strain the
agitator shaft.
Remove the allen studs (55) that fix the shaft to the motor and separate the motor or gear motor (93) of
the agitator shaft (05).
Finally, remove the hexagonal screws (52, 52A), flat washers (53, 53A) that separate the flange (23)
from the lantern (04) and the latter from the bearing support (70).
8.6.2. Assembly of the agitator
Assemble the agitator shaft (05) onto the motor or gear motor (93). Locate the threaded holes above the
keyway. Introduce the allen studs into these holes and tighten until they lock on the keyway. The allen
studs must not protrude from the external diameter of the shaft.
Assemble the bearing support (70) in the lantern by means of the hexagonal screws (52A) and flat
washers (53A), without tightening them.
Introduce the agitator shaft and the motor through the bearing support (70) until the flange of the lantern,
and firmly tighten the hexagonal screws (52C).
Tighten the hexagonal screws (52A) of the bearing support (70).
Next, place the flange (23) on the lantern centering (04) fixing through the hexagonal screws (52) and flat
washers (53).
Check that the surfaces of the agitator shaft (05) and the flange (23) are in good condition (perfectly
polished finish).
When fitting the new seals, be sure to wet the O-rings with soapy water so that the fixed parts slide easily
into their locations and the rotating parts onto the shaft.
Place the stationary part of the mechanical seal (08) on its location on the flange (23).
Place the rotating part of the mechanical seal (08) and fix it to the agitator shaft through its fixing studs as
shown in the assembly instructions, figure 8.1.
Locate the shaft guards (47) with the hexagonal screw (52B) and flat washers (53B) to the lantern (04).
Place the O-ring (80) on the agitator shaft (05).
Install the agitator in the flange of the tank.
Finally, mount the propeller (02) firmly on the agitator shaft (05), checking that it will not become loose.
