Multitec, Caution, Tightening the shaft nuts on multitec pumps – Multitech 1777.8/7-10 G3 User Manual
Page 23: Tightening torques for shaft nuts
Caution
Caution
1.) Tighten nut to torque M1, then loosen again
1.) Tighten first nut to torque M1, then loosen again
2.) Tighten first nut to torque M2
3.) Tighten second nut to torque M3, at the same time blocking first nut
1.) Tighten first nut to torque M1
2.) Tighten second nut to torque M2, at the same time blocking first nut
2.) Tighten to torque M2 and bend over lockwasher
Multitec
23
When tightening the shaft nuts, please observe the following:
The shaft nuts must be tightened to the torques indicated in the table ”Tightening torques for shaft nuts”.
Tightening the shaft nuts on Multitec pumps
Shaft nuts without lockwasher
Not applicable to drive end on MTC 32/50/65 with self-locking shaft nut
Tightening torques for shaft nuts
Drive end
Non-drive end
Pump size
A, B, C, D
E,F,V
A,B,E,F,V
C,D
Nut
Nm
Nut
Nm
Nut
Nm
Nut
Nm
80
1)
80
1)
80
1
)
MTC 32
M 25x1,5
40 (***)
M 25x1,5
40 (***)
M 25x1,5
40
M 25x1,5
40
100 (*)
80
1)
80
1)
80
1
)
MTC 50
M 30x1,5
40 (***)
M 25x1,5
40 (***)
M 30x1,5
40
M 30x1,5
40
120 (*)
100
1)
80
1)
100
MTC 65
M 35x1,5
50 (***)
M 30x1,5
40 (***)
M 35x1,5
50
M 35x1,5
50
150 (*)
M 42 1 5
150
1
)
M 42 1 5
150
1
)
150
1
)
MTC 100
M 42x1,5
(2x)
50
M 42x1,5
(2x)
50
M 42x1,5
50
M 42x1,5
50 (***)
(2x)
150 (*)
(2x)
150 (*)
150(*)
M 52 1 5
200
1
)
M 52 1 5
200
1
)
200
1
)
MTC 125
M 52x1,5
(2x)
60
M 52x1,5
(2x)
60
M 50x1,5
60
M 52x1,5
60 (***)
(2x)
200 (*)
(2x)
200 (*)
200 (*)
M 62 1 5
250
1
)
M 62 1 5
250
1
)
M 62 1 5
250
1
)
MTC 150
M 62x1,5
(2x)
80
M 62x1,5
(2x)
80
M 60x1,5
80
M 62x1,5
(2x)
80
(2x)
250 (*)
(2x)
250 (*)
250 (*)
(2x)
250 (*)
1)
loosen after first tightening
(*)
block first nut when tightening
(**) self-locking nut
(***) bend over lockwasher
Tightening the shaft nuts on Multitec pumps
Nut with lockwasher - (drive end and non-drive end on versions C and D)
M1
M2
Nut with locknut - drive end (and non-drive end on versions C and D)
M1
M2
M3
Nut with locknut - non-drive end (except versions C and D)
M1
M2
Self-locking nut - old version MTC E/F/V 32/50/65 (drive end)
No torques given