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
p02
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 g reas e
Sealed with Loctite 574
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