Omega
12
7.4
Reassembly
Reassembly is effected in reverse order to dismantling. For all
work on the pump unit refer to the general drawing, in conjunc-
tion with the list of components, for orientation.
The rules of sound engineering practice and also the instruc-
tions for removal and installation of shaft seal, bearings, impel-
ler wear rings and casing wear rings (sections 7.5.1 and 7.5.2)
must be observed.
The tightening torques indicated for nuts and bolts shall be ob-
served. The table below indicates the tightening torques for
threads depending on the materials used.
Property class
(Material)
8.8
10.9
A.-50
A.-70
1.4462
0,2% yield stress
640
900
210
450
R
p 02
in
N/mm
2
1
)
250
450
Metric ISO threads
Tightening torque
coarse--pitch-
fine--pitch-
M
A
in Nm
M4
3,1
4,4
1,0
2,15
M5
6,1
8,7
2,00
4,25
M6
10,4
14,9
3,40
7,30
M8
25,2
36,1
8,30
17,7
M8x1
27,2
39,0
8,90
19,1
M10
49,5
71,0
16,2
34,8
M10x1,25
52,5
75,4
17,3
36,9
M12
85,2
122,2
28,0
59,9
M12x1,5
89,5
128,5
29,4
62,9
M12x1,25
93,9
134,7
30,8
66,0
M16
211
302,7
69,2
148
M16x1,5
226
324,7
74,3
159
M20
412
591,9
135
290
M20x1,5
461
661,0
151
324
M24
710
1019,6
233
276
500
M24x2
780
1118,6
256
305
548
M27
1050
1501,3
343
409
736
M27x2
1130
1627,1
372
443
797
M30
1420
2036,4
466
554
1000
M30x2
1580
2269,9
519
618
1110
M33
1940
2779,4
636
----
1360
M33x2
2130
3062,6
700
----
1500
M36
2480
3552,3
812
----
1740
M36x3
2630
3775,4
863
----
1850
1
) Nominal values to DIN ISO 898 Part 1, DIN 267 Part 11 and DIN 267 Part 18
It is imperative to lock and seal the screwed connections spe-
cially marked in the general drawings.
Symbols for screwed connections to be locked and sealed:
ALTEMP Q NB 50 grease
Sealed with Loctite 574