5 Installation/Dismantling
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4STQ
2580.821/04-EN
5.3.6 Installing the double cartridge seal C150/160M1-4STQ
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.
(
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. Verify that O-rings 412.55, 412.60 (2 nos.) and 412.59 are correctly seated in
their respective grooves.
3. Insert O-ring 412.54 in discharge cover 163. Ensure that no permanent lubricant
is used.
901
Fig. 12:
Illustration showing hexagon head bolts
4. Remove the hexagon head bolts 901 (3 nos.) that make up the transport lock
and store them.
5. Carefully slide the entire seal assembly onto the pump shaft.
6. Apply a coat of a suitable grease to shaft 210 in the area of the mechanical seal
and the impeller hub.
7. Align the groove in shaft sleeve 523 with the groove in shaft 210.
8. Carefully slide the entire cartridge mechanical seal 4STQ onto the shaft until seal
cover 471 abuts discharge cover 163. Apply the axial force required for insertion
into the discharge cover in the area of the outside diameter of seal cover 471.
Ensure that primary ring 472.52 and mating ring 475.52 are not damaged. A
tube with an inside diameter larger than 225 mm and outside diameter smaller
than 250 mm can be used to press the stationary seal cover into the discharge
cover of the pump.
9. Fit circlip 932.53 in the groove of discharge cover 163. Make sure it is correctly
seated.
10. Fit O-ring 412.06 on the shoulder of shaft sleeve 523.
