KSB CHTRa, Installation & Operating Manual

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7 Servicing/Maintenance
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CHTRa
Tightening procedure Tighten in 3 separate passes. Apply the tightening torque as follows:
▪ First pass: 50 % of the specified torque value
▪
Second pass: 85 % of the specified torque value
▪ Third pass: 100 % of the specified torque value
Perform a final check to ensure that a tightening torque of 100 % has been applied.
This check is necessary to rule out any pump casing displacement.
Tightening torque ü The threads to be used have been cleaned and lubricated. Lubricant has been
applied to threads and contact faces.
ü The cap nuts have been tightened in the sequence specified. See
(
ð Section 10, Page 103)
ü The specified tightening torques have been observed.
(
ð Section 10.2.3, Page 107)
ü The casing gasket has been positioned and secured in place.
CAUTION
Improper transport
Damage to the pump!
▷
Never use the cast lifting lugs for lifting the entire pump.
▷ The cast lifting lugs provided on the upper casing half are for lifting the upper
casing half only.
1. Insert taper pins 560.01 in the upper casing half.
2. Attach upper casing half to the lifting equipment.
3. Place the upper casing half on the lower casing half and secure using washers
550.01 and cap nuts 920.01.
4. Tighten cap nuts 920.01 in 3 or more passes, increasing the torque during each
pass until the specified tightening torque has been reached.
7.4.8 Installing the mechanical seal
1. Slide both completely assembled cartridge mechanical seals onto the shaft.
2. Tighten nuts 920.02/.04.
7.4.9 Fitting the bearings
7.4.9.1 Fitting the non-drive-end thrust bearing (for variants with rolling element
bearing only)
1. Slide labyrinth rings 423.02/423.03 onto shaft 210 and place them in their
approximate installation position.
2. Slide bearing covers 360.01/.02 with O-rings 412.01/.02 onto shaft 210.
3. Fit clamping elements 81-51, ensuring that the clamping elements 81-51 used
have the appropriate thickness.
4. Slide non-drive-end spacer sleeve 525.01 onto the shaft.
WARNING
Hot surfaces due to heating of components for assembly/dismantling
Risk of burns!
▷ Wear heat-resistant protective gloves.
▷ Remove flammable substances from the danger zone.
5. Heat angular contact ball bearing 320.02 in a temperature-controlled oven or
via induction for 30 minutes at a temperature of approx. 70 °C.