Installation and dismantling of fan impeller in Duobloc burners
dreizler A 3001 E - 18.12.2015 | A 2028 - 1.09 | EN - 15.06.2009
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34.3 Dismantling the taper lock bush
Loosen and remove the two threaded rods (see A in Fig. 34-2 "Fan impeller with taper lock bush").
Remove any dirt and grease the threaded hole.
Screw one of the two removed threaded rods into the dismantling hole B Fig. 34-1 "Blower fan impeller".
Tighten the threaded screw until the taper lock bush loosens in the fan impeller seating.
Extract the taper lock bush and the fan impeller from the motor shaft.
34.4 Mounting the taper lock bush
Remove the dirt from the bore and from the exterior of the taper lock bush.
NOTICE:
All contact and conical surfaces must be completely free of dirt and oil.
Push the taper lock bush into the hub, aligning the two threaded holes.
Oil the threaded bore and remove any dirt from the threaded rods.
Screw the threaded rods loosely into the threaded bores of the hub. See Fig. 34-2 "Fan impeller with
taper lock bush".
Clean the shaft and the hub, and adjust the position of the taper lock bush.
Push the taper lock bush loosely onto the shaft and adjust the required distance between front edge of
the shaft and front edge of the taper lock bush.
Use a hammer and wooden or rubber block to hit against the broad side of the taper lock bush until the
required position is reached.
Evenly tighten the threaded rods with a 6mm Allen key.
Retighten the threaded rods once again with a torque wrench to ensure a torque of 50Nm.
Inject some grease into the gaps and the heads of the threaded rods to avoid the build-up of dirt.
CAUTION!
Shafts with a key feather must have the key feather inserted before the taper lock bush is mounted.
The feather key must be installed parallel, and may only touch the side surfaces. The upper surface
must remain free.
