Zenit Group | 29 Mar 2018

UNIQA - ZUG GR WET

Disassembly - Complete mechanical seal disassembly and oil change procedure for Zenit UNIQA submersible pumps. The procedure also involves adjustment of the impeller and chopper knife clearance. Models with grinding system (ZUG GR) in WET version.

Step by step operations

Undo the chopper knife fixing screw and remove it
Undo the chopper plate fixing screw and remove it
Fit a screw into the seat in the shaft to lock the impeller in place
Undo the pump body screws and remove it
Release the impeller with the aid of a lever
Undo the impeller fixing screw and remove the impeller
Screw a male eye-bolt onto the shaft and lift the motor with a hoist
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
Remove the handle
Place the motor vertical on a firm support in a position which does not crush the cables
Remove the paper seals
Remove the V-ring
Undo the fixing screws of the pump plate and remove it
Undo the fixing stud bolts of the casing with a hex key and remove it
Remove the seal
Remove the flange snap ring
To remove the seal flange, fit an eye-bolt onto the shaft and lift it with a hoist
Unscrew the male eye-ring from the shaft and remove the sealing flange

Stay connected with Zenit