7 Servicing/Maintenance
77 of 98
UPA / UPA S
3400.86/17-EN
10. Insert the grub screw and/or anti-lift device including securing screw into the
coupling sleeve. Apply Loctite 242. Gently screw in the screw until it will not go
any further, then turn it back by
1
/
8
of a turn. In the case of a splined shaft end,
turn the screw back by
1
/
2
of a turn.
Fig. 44:
UMA 150, UMA-S 150
Fig. 45:
UMA 200, UMA-S 200, UMA 250, UMA-S 250
CAUTION
Incorrect fitting of the grub screw
Damage to the submersible motor!
▷
Make sure the fitted grub screw does not touch the rotor.
11. Use a torque wrench to tighten the assembly studs; alternate sides after each
stud. Observe and check the tightening torque (
12. Fasten the electric cables to the pump set together with the suction strainer and
the cable guard.
7.6.2 Tightening torques
Table 29:
Tightening torques for bolted/screwed connections at the pump/motor
Material / property class
A4 - 50
A4 - 70
A4 - 80
1.4462
Rp 0,2 [N/mm²]
210
450
600
450
Metric thread
Tightening torque M
A
[Nm]
Coarse-pitch thread
Fine-pitch thread
M4
-
1,0
2,15
2,9
2,15
M5
-
2,0
4,25
5,7
4,25
M6
-
3,4
7,3
9,75
7,3
M8
-
8,3
17,7
23,7
17,7
-
M8 × 1
8,9
19,1
25,5
19,1
M10
-
16,2
34,8
46,4
34,8
-
M10 × 1,5
17,3
36,9
49,2
36,9
M12
-
28,0
59,9
79,8
59,9
-
M12 × 1,5
29,4
62,9
83,9
62,9
