Avery Dennison ALS 204 Service And Installation Manual page 191

9 R
EPAIR
9.4 U
NWIND UNIT
Replacing ball bearings in expanding
mandrel
– Prerequisite: expansion bars and unwinding spool
are removed.
Remove 3 screws [218B], remove the support

disc [218A].
Soften up the adhesive bond on both ball bearings

[219A, B] using a hot air blower.
Remove the ball bearings.

Remove adhesive residues from the bearing seats.

Fixing the ball bearings with adhesive:
Glue the ball bearings into the bearing seats

with Loctite 648.
Follow the adhesive manufacturer's instruc-

tions for use.
Glue the ball bearings into the expanding

mandrel [219]. Allow the adhesive bond to set.
Installing the unwinding spool.
Install unwinding spool with brake loosened.

Install shim [220B] and retaining ring. Ensure that

the circlip fully engages with the groove in the shaft.
Measure the axial play of the unwinding spool on the

shaft.
– Desired nominal play: c. 0.2 mm
If necessary, remove circlip and readjust axial play

using a suitable shim.
Install O-ring and aluminium ring.

Install knob complete with sleeve, paying attention

to the situation of the front-facing thread [220A] in
the expanding mandrel.
Install core adapters.

[218] Removing the support disc (fig.: ALS 20X)
A
[219] Installation position of ball bearings in expanding mandrel
A
[220] Adjusting axial play with shim
191
ALS
20X
256
A
B
B
B