Grundfos FB 10/40, Инструкция по установке и эксплуатации

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27. Slide the seal spacer 61 onto the pump shaft 51.
Applies to the open mechanical seal only
(see fig. 11 on page 25).
Fig. 45 Pump shaft
28. Insert the key 11 into the pump shaft 51.
Grease contact surfaces of pump shaft 51.
Recommend Klüberpaste UH1 96-402 or
equivalent.
Fig. 46 Key
29. Grease contact surfaces to impeller 49 on the
pump shaft 51.
Recommend Klüberpaste UH1 96-402 or
equivalent.
Slide the impeller 49 onto the pump shaft 51.
Fig. 47 Impeller
30. Lightly grease the impeller lock washers.
Recommend Klüberpaste UH1 96-402 or
equivalent.
Prepare the impeller nut 67 together with impeller
lock washers 66 as shown in Fig. 48
Fig. 48 Sequence for Impeller nut
• 49 impeller
• 66 impeller lock washers
(fine teeth facing outwards, coarse teeth together)
• 67 impeller nut
• 67b O-ring
31. Grease the thread of the pump shaft 51
Recommend Klüberpaste UH1 96-402 or
equivalent.
Fig. 49 Impeller lock washers in impeller nut
32. Screw the impeller nut 67 onto the pump shaft
51 with a 4mm gap to impeller 49.
This gap is intended for the impeller nut O-ring.
33. Slide O-ring 67b over impeller nut 67.
34. Tighten the impeller nut 67 by using a socket
wrench (pos. 4 or 5, fig. 55) on the impeller nut.
Insert a screwdriver or similar tool through the
hole in the shaft 51 to prevent shaft rotation.
Torques:
M10: 15 lbf ft (20 Nm).
M20x1.5: 74 lbf ft (100 Nm).
CAUTION. Do not attempt to prevent shaft
rotation by jamming screwdriver between the
shaft 51 and the tension ring bolts 9. Damage to
the tension ring bolts will occur!
Fig. 50 Torque wrench
67
66
66
49
67b