55
Table 26: Tightening torques for screwed connections
Re-tighten the impeller nut some 20 to 30 minutes after assembly.
7.7 Spare parts stock
7.7.1 Ordering spare parts
Always quote the following data when ordering replacement or spare parts:
. Type series
. Size
. PUMPIRAN order number
. Material variant
. Year of construction
Refer to the name plate for all data.
Also supply the following data:
. Description
. Part No.
. Quantity of spare parts
. Shipping address
. Mode of dispatch (freight, mail, express freight, air freight)
7.6.2 Tightening torques for the impeller nut
Observe the following tightening torques for impeller nut (922):
Table 27: Tightening torques for the impeller nut
M aterial
stud/hex. nut
6.8/6.8
A4-70/A4-70
Stamp mark
stud/hex.
nut
13)
Y K /Y
A4-70/A4-70
GA/G
Tightening torques [Nm]
Bearing
bracket
lantern
14)
A
B
A
B
A
B
New
threads
15)
-15
%
16)
-20
%
16)
New
threads
15)
-15
%
16)
-20
%
16)
New
threads
15)
-15 %
16)
-20 %
16)
M10
M12
M16
M20
8.8/8.8
30
25.5
24
47
30
39.9
25.5
37.6
24
_
_
_
55
46.7
44
80
55
68
46.7
64
44
155
40
100
34
85
32
80
131.7
124
190
155
161.5
131.7
152
124
200
170
160
330
200
280.5
170
264
160
_
_
_
13) Treat unstamped screwed connections like material pair 6.8/6.8
14) A: made of toughened material - except for GG-25; B: made of material GG-25
15) These values are determined on the basis of a friction coefficient μ = 0.12.
16) After repeated tightening of the threads and in case of good lubrication, reduce the values by 15 to 20 %.
7 Servicing/Maintenance
Bearing bracket
Tightening torque
[Nm]
W idth across flats
[mm]
UP02
80
22
UP03
125
27
UP04
200
32
UP05
300
41
UP06
520
55
P08s
1000
60
