KSB Amarex N series, Installation And Operating Manual

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7 Servicing/Maintenance
57 of 84
Amarex N
2563.84/08-EN
7.5.2.2.2 Fitting impeller type D
NOTE
For bearing brackets with tapered fit make sure that the tapered fit of impeller and
shaft is undamaged and installed free from grease.
2563:127
Fig. 30: Fitting impeller type D
1. Slide impeller 230 onto the shaft end and fasten it with impeller screw 914.04.
2. Then, remove the impeller screw again.
3. Screw in an M8 x 100 eyebolt (not included in KSB's scope of supply) instead of
the impeller screw.
4. Push on suction cover 162 until it rests against the impeller.
5. Suspend the pump set by the eyebolt (not included in KSB's scope of supply).
6. Screw in levelling screws 904 until they abut against the pump casing.
7. Carefully lower down the pump set again.
8. Remove the suction cover.
9. Measure the height of screws 904 up to suction cover 162 and add 0.8 +/- 0.1
mm to the height of every screw.
10. Re-insert the suction cover and fasten it with screws 914.03.
11. Suspend the pump set from the hoisting tackle and rotate the impeller by hand
to check that it rotates easily.
12. Remove the eyebolt (not included in KSB's scope of supply).
13. Insert and tighten the impeller screw.
7.5.3 Reassambling the motor section
NOTE
Before reassembling the motor section, check that all joints relevant to explosion
protection (flamepaths) are undamaged. Any components with damaged
flamepaths must be replaced. Only use original spare parts made by KSB for
explosion-proof pumps. Observe the flamepath positions specified in the Annex
(Flamepaths on explosion-proof motors). Secure all screwed/bolted connections
closing off the flameproof enclosure with a thread-locking agent (Loctite Type 243).
DANGER
Wrong screws/bolts
Explosion hazard!
▷ Always use the original screws/bolts for assembling an explosion-proof pump
set.
▷
Never use screws/bolts of different dimensions or of a lower property class.