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Zenit Group
|
29 Mar 2018
UNIQA - ZUG V WET
Disassembly - Complete mechanical seal Disassembly and oil change procedure for Zenit UNIQA submersible pumps. Models with vortex impeller (ZUG V) in WET version. High pressure mechanical seals.
Step by step operations
Place the pump vertical on the workbench
Undo the pump body screws
With a hoist, lift off the motor by the handle
Hang the motor section with the impeller over a firm support to hold the motor while the impeller is removed
Loosen the impeller fixing screw but do not remove it
Use a lever to free the impeller from its tapered seat
Undo the impeller fixing screw and remove it
With a hoist, lift up the motor and lay it horizontal on the workbench
Screw a male eye-bolt onto the shaft
Drain the oil from the chamber into a suitable container
CAUTION take care when unscrewing the caps as there may be pressure inside the chamber
With a hoist, lift the motor by the shaft
Remove the handle
Place the motor vertical on a firm support which does not crush the cable
Remove the V-ring
Undo the screws of the pump plate and put it on the workbench
Undo the counterface locking ring screws and remove the oil cage, O-ring and counterface
Remove the seal
Undo the fixing stud bolts of the casing and remove it
Remove the snap ring that secures the seal
Remove the seal using 2 levers
Remove the snap ring that secures the flange
Screw a male eye-bolt onto the shaft and lift it up to remove the flange. Use a Teflon hammer if necessary
Unscrew the male eye-ring from the shaft and remove the sealing flange
Remove the seal from the flange
CAUTION To avoid damaging the seal, do not use metal tools
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