7 Servicing/Maintenance
91 of 116
CHTRa
CAUTION
Improper reassembly
Damage to the pump!
▷
Reassemble the pump (set) in accordance with the general rules of sound
engineering practice.
▷
Use original spare parts only.
NOTE
Check dismantled parts for damage. The installation of damaged parts leads to
increased wear or to failure of the balancing device, which results in damage to the
pump rotor.
▪
Reassembly must be performed in accordance with the rules of sound mechanical
engineering practice.
▪
Meticulously clean all dismantled parts, in particular the locating and sealing
surface areas.
▪
If required, remove any lime and incrustation from the cooling chambers.
▪
Check all dismantled parts for damage.
▪
Prior to reassembly coat the screw/bolt connections and pipe unions as well as
the fits of the individual components using the respective specified lubricating
agent as described in the work instruction
UA4 28699 01
.
Sequence
Always reassemble the pump in accordance with the corresponding general assembly
drawing.
Sealing elements
▪
Gaskets
– Always use new gaskets, making sure that they are of the same thickness and
material as the old ones.
▪
O-rings
– Always use new O-rings, making sure that they are of the same thickness and
material as the old ones.
– Never use O-rings that have been glued together from material sold by the
metre.
Tightening torques
For reassembly, tighten all screws and bolts as specified in this manual.
7.4.2 Installing the impeller wear ring
Fig. 39:
Installing the rotor
Level or renew depending on the degree of wear. Observe the clearance
specifications to API 610. (
