KSB 4STQ Series, Installation & Operating Manual

Page: 21 / 44

5 Installation/Dismantling
21 of 44
4STQ
2580.821/04-EN
10. Fit circlip 932 in the groove of discharge cover 163. Make sure it is correctly
seated.
11. Slide O-ring 412 over the shaft until it abuts against the mechanical seal.
5.3.3 Installing the double cartridge seal C055/065M1-4STQT
CAUTION
Use of grease or other permanent lubricants
Torque transmission impeded / overheating of and damage to the pump!
▷ Never use grease or other permanent lubricants for fitting the torque-
transmitting elements of a mechanical seal.
▷ Use soft soap to reduce any friction caused during assembly.
▷
Never coat the mechanical seal faces with grease or oil.
ü The relevant documentation for installing the mechanical seal is observed.
(
ð
Section 9.1.4, Page 37)
ü
The back pull-out unit has been removed from the pump casing and safely
positioned and secured in a horizontal position.
ü
The original 4STQ cartridge seal is fully assembled and undamaged.
1. Apply a suitable lubricant to the O-rings. Ensure that no permanent lubricant
comes into contact with the O-rings, in order to guarantee reliable torque
transmission.
2. Insert O-rings 412.54/.55/.56 in discharge cover 163. Ensure that no permanent
lubricant is used.
3. Insert O-ring 412.59 into the circular groove of shaft protecting sleeve 523.
4. Apply a coat of a suitable grease to shaft 210 in the area of the mechanical seal
and the impeller hub.
5. Place key 940 in the shaft keyway.
6. Align the groove in shaft sleeve 523 with key 940 in shaft 210.
7. Carefully slide the entire cartridge mechanical seal 4STQT onto the shaft until
seal cover 471 abuts discharge cover 163. Apply the axial force required for
insertion into the discharge cover via the seal cover only. Ensure that primary
ring 472.52 and mating ring 475.52 are not damaged. A tube with an inside
diameter larger than 128 mm and outside diameter smaller than 145 mm can be
used to press the stationary seal cover into the discharge cover of the pump.
8. Fit circlip 932.53 in the groove of discharge cover 163. Make sure it is correctly
seated.