Philips Spectra 8890XL User Manual page 19

If you accidentally interchange the cutters and
heads, it could take several weeks before optimal
shaving performance is restored.
C
6 Replace the set back into the Head
Assembly in such a way that the sides with
the little holes are positioned to the
middle of the shaving unit.
Make sure that the two pointy edges of the head
fit exactly into the recesses.
7 Repeat the process for the other two sets
of razor heads.
8 Replace the retaining frame.
C
9 Press down and turn wheel clockwise until
it locks into place.
10 Place the Razor Head Assembly back on
razor.
For optimum performance, razor cutters and
combs should be cleaned in a degreasing liquid
(e.g. Norelco Razor Cleaner, model RC1776, or
rubbing alcohol) and then must be lubricated with
Norelco Razor Lubricant, model AL80, or one
drop of mineral oil (in the center of the head).
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