Multitech 1777.8/7-10 G3 operating instructions Tightening the shaft nuts on Multitec pumps

Multitec

Caution 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

Caution	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 (*)
			150 1)		150 1)				150 1)
		M 42x1,5		M 42x1,5
MTC 100			50		50	M 42x1,5	50	M 42x1,5	50 (***)
		(2x)		(2x)
			150 (*)		150 (*)		150(*)
			200 1)		200 1)				200 1)
		M 52x1,5		M 52x1,5
MTC 125			60		60	M 50x1,5	60	M 52x1,5	60 (***)
		(2x)		(2x)
			200 (*)		200 (*)		200 (*)
			250 1)		250 1)				250 1)
		M 62x1,5		M 62x1,5				M 62x1,5
MTC 150			80		80	M 60x1,5	80		80
		(2x)		(2x)				(2x)
			250 (*)		250 (*)		250 (*)		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

1.) Tighten nut to torque M1, then loosen again

2.) Tighten to torque M2 and bend over lockwasher

Nut with locknut - drive end (and non-drive end on versions C and D)

M1

M2

M3

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

Nut with locknut - non-drive end (except versions C and D)

M1

M2

1.) Tighten first nut to torque M1

2.) Tighten second nut to torque M2, at the same time blocking first nut

Self-locking nut - old version MTC E/F/V 32/50/65 (drive end)

No torques given

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