Leak Testing (Versions Yl And Wl); Checking The Connection Of Motor/Power Supply; Tightening Torques; Spare Parts - KSB Amarex N Series Installation And Operating Manual

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7 Servicing/Maintenance
7.5.4 Leak testing (versions YL and WL)
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
2563:115
Fig. 31: Screwing in the testing device
1. Unscrew and remove the screw plug and joint ring of the lubricant reservoir.
2. Screw the testing device tightly into the lubricant filler opening.
3. Carry out the leak test with the values specified above.
The pressure must not drop during the test period.
If the pressure does drop, check the seals and screwed connections.
Repeat the leak test.
4. If the leak test has been successful, fill in the lubricant.

7.5.5 Checking the connection of motor/power supply

Check the power cables after reassembly. (ð Section 7.2.1, Page 44)

7.6 Tightening torques

Table 24: Tightening torques
Thread
M8
Impeller screw M8
Screw plug 903

7.7 Spare parts

NOTE
For explosion-proof pump sets only original spare parts or parts authorised by the
manufacturer must be used.

7.7.1 Ordering spare parts

Always quote the following data when ordering replacement or spare parts:
▪ Order number
▪ Order item number
▪ Type series
▪ Size
▪ Year of construction
▪ Motor number
Refer to the name plate for all data.
Amarex N
[Nm]
17
40
23