Maintenance / servicing
52
BA.10A.CNY.001.01.10.GB
13. Insert the Nord-Lock washer 0930.00 into the
impeller nut 0922.00.
Fig. 72
Nord-Lock washer in impeller nut
14. Tighten the impeller nut 0922.00 by hand. Let
about 5 mm space for the O-ring 0412.04.
Fig. 73
Impeller nut
15. Slide the O-ring 0412.04 on the impeller nut
0922.00 into the gap between the impeller nut
0922.00 and the impeller 0230.02.
Fig. 74
O-ring
16. To tighten the impeller nut 0922.00 properly use
the impeller-fastening-aid from the HILGE
assembly tool kit, fig 81.
•
Contra II position 13 a/b
•
Contra I position 13 c/d
Place the plastic insert first followed by the metal
plate.
Fig. 75
Impeller-fastening-aid
17. Tighten the metal plate of the fastening-aid to
the pump casing 0112.02.
Fig. 76
Fastening-aid metal plate
18. Tighten the impeller nut 0922.00 using the fol-
lowing adjustments:
Torques:
M10x1.5: 20 Nm
M20x1.5: 100 - 120 Nm.
Use the socket wrench with insert from HILGE
assembly tool kit, pos. 7 or 9 (depending on the
size of the nut) fig
. That way you avoid dam-
age to the impeller nut 0922.00 and shaft
0211.00.
19. Disassemble the impeller-fastening-aid.
Fig. 77
Socket with insert
