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7.
Correctly support pumping element in horizontal position. For non-inducer machines
release impeller locking screws and locknut on impeller. For machines fitted with an
inducer, release cap nut then remove security washer.
Note - Locking devices have left hand throat form.
8.
Remove inducer (if fitted) and impeller.
9.
Remove and discard gasket from casing cover. Now rotate assembly so that the shaft axis
is in the vertical plane with coupling end uppermost.
10.
Refer to mechanical seal drawing (in the Appendix of this manual) and identify the seal
setting plates on the front of the gland plate.
11.
Rotate (or slide as appropriate for the design) the plates into the mechanical seal sleeve
setting groove and then secure.
12.
Slacken the screws locking the collar/seal sleeve onto the pump shaft.
13.
Unscrew any pipework from the tapped ports on the periphery of the gland plate.
14.
Remove the cap screws which secure the casing cover to the bearing housing.
15.
With the casing cover suitably supported carefully remove the bearing housing and place
horizontally on flat surface.
16.
Remove the four nuts securing the gland plate to the casing cover. Returning to the casing
cover (with the gland plate uppermost). Note - When oil ring lubrication is provided an
additional ½" NPT plug is fitted in the top of the bearing housing adjacent to the mushroom
headed vent. Removal of the plug should enable the visual inspection of the ring.
17.
Remove mechanical seal cartridge assembly.
18.
Now, returning to the bearing housing, remove impeller key (and throat bush if fitted). If a
cooling fan is fitted, then remove the three locking screws securing the fan to the outboard
flinger.
Withdrawal the fan from the coupling end of the shaft.
19.
Loosen clamping screws and remove flingers from pump shaft.
20.
Remove cap screws from bearing end covers, securing cover to bearing housing.
21.
Remove bearing end covers remove and discard gasket. Remove labyrinth from bore of
outboard end cover. Remove o-ring from labyrinth.
22.
Place the bearing housing in a vertical position, (coupling end up) on blocking. Blocking
must be of sufficient height to prevent shaft end from contacting the floor.
To avoid damage to the oil rings, (when fitted) position them as shown.
