7 Servicing/Maintenance
54 of 82
Amarex
2573.820/02-EN
5. Push on suction cover 162 until it rests against the impeller.
6. Suspend the pump set from the eyebolt
11)
.
7. Screw in adjusting screws 904.15 until they abut against the pump casing.
8. Carefully lower down the pump set again.
9. Remove the suction cover.
10. Measure the height of screws 904.15 up to suction cover 162 and add 0.3 +/-
0.1mm to the height of every screw.
11. Re-insert the suction cover. Fasten it with screws 914.16.
12. Suspend the pump set from the lifting equipment and rotate the impeller by
hand to check that it rotates easily.
13. Undo and remove the eyebolt
11)
.
14. Fit impeller screw 914.16. Tighten it to 30Nm.
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 Type243).
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.
7.5.4 Leak testing
After reassembly, the mechanical seal area/lubricant reservoir must be checked for
leakage. The leak test is performed at the lubricant filler opening.
Observe the following values for leak testing:
▪ Test medium: compressed air
▪ Test pressure: 0.5 bar maximum
▪ Test duration: 2 minutes
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