Alamarin Jet AJ 160, Operation And Maintenance Manual

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Operation and Maintenance Manual
3434
Version 1.5
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3. Place the impeller on the shaft along with the cone. Tighten the screws finger tight.
4. Push the impeller as far in the intake duct as it goes (B).
BE CAREFUL NOT TO LEAVE YOUR FINGERS BETWEEN
THE IMPELLER AND THE CONE! Use the working position (A)
shown in figure 4.3.2-1!
Tighten the screws to a torque of 20 Nm.
Screw the adjuster sleeve through the inspection hatch so that it sits tightly against the
impeller’s plastic cone. If the adjusting sleeve is left loose (B), the impeller gets stuck in
the duct cone. Reference C shows a correctly tightened sleeve.
There can be a gap of 0.2 mm between the impeller blade and the cone (D). During
installation, the lower edge lies on the cone and there can be a slightly bigger gap at
the upper part of the impeller due to the weight of the impeller and the axle. This gap
disappears when the stator finally centers the shaft.
Too wide a gap between the cone and the impeller blade leads to loss of power.
If the impeller does not rotate properly after the installation, open the impeller screws,
pull it slightly outwards, and tighten the screws.
5. Close the inspection hatch.
6. Install the reversing deflector, the steering nozzle and the stator in place as a whole in
a reverse order than when removing. The tightening torque for M10 bolts is 50Nm and
80Nm for M12 bolts.
B
C
A
Figure 4.3.2-1
D