UNICA EVOLUTION: Service & Maintenance Manual - rev. 1.1
5. WHAT IF …
5.1. THE WEIGHT STACK DOES NOT SLIDE SMOOTHLY
This problem is due to insufficient lubrication of the bars or grime build-up from a mixture of dust
and oil. Clean and lubricate as illustrated below:
Photo 5.1-1
1. Use a paper towel slightly dampened with
ethyl alcohol to clean the weight stack bars
of the machine, removing dust and grime.
2. Reassemble the cross and add a few drops of
the oil found in the service box to the cross
bushings as shown in the photo below.
3. Move the cross up and down, making sure to
distribute the oil evenly along the full length
of the bars.
4. Dry excess oil from the bushings with a dry
cloth.
Do not use too much oil, and dry all
excess thoroughly since too much oil
could cause more dust to build up.
When the bars and bushings are
especially dirty, and only when the cross
alone or at most the cross and one plate
are selected, it may not return to rest on
the other plates but stick a few
centimeters above. Clean and lubricate
the bars thoroughly, as well as inside the
bushings where the bars slide, using a
paper towel moistened with ethyl
alcohol.
Page 5.1
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