Impeller Tunnel - Alamarin Jet COMBI-FRAME AJ 285 Repair Manual

8. Place the o-ring on to the shaft against the shoulder (figure 46, point A)
and the shim rings against the rear surface of the impeller.
9. Push the sleeve on to the shaft.
Checking the position of the sleeve:
You can check whether there is an adequate number of shim rings behind the
impeller by measuring distance d from the end of the shaft to the rear end of
the sleeve (figure 46). The correct distance is 3.5 mm.
Figure 46. Checking the position of the sleeve
1. Once the sleeve is correctly positioned, place the locking plate to the end
of the shaft and tighten the rear screw to a torque of 46 Nm.
Apply thread locking compound (such as Loctite 242) to the screw.
2. Make sure that the impeller cannot move forwards of backwards from its
place.
3.5. Impeller tunnel
The impeller spins inside a tunnel with an aluminium exterior surface (figure
47, point A) and an inner cone made of acid-proof steel (figure 47, point B).
The inner cone is not an actual wearing part as the cone shape enables the
impeller to be adjusted more deeply, in order to maintain a small clearance.
However, if the inner cone is damaged, the entire impeller tunnel can be
replaced.
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Impeller
Repair manual
KM/285/EN/1.1.0