7 Maintenance and care
86 TW85
7.9.5.3 Cartridge replacement
Main cartridge
• Release the wire tighteners (69/1) and remove
the bottom of the housing (69/4).
• Withdraw the main cartridge (69/2) by twisting
slightly to and fro.
• Check whether the safety cartridge (69/3) must
be replaced.
Remove the safety cartridge only in
the case of necessary maintenance
work. Only open the seal (69/5) of
the safety cartridge for the purpose
of replacement.
• Note down the date of maintenance in the
appropriate sections of the safety cartridge
(69/3).
• Insert the new or cleaned main cartridge
carefully into the filter housing starting with the
open side and check that it is correctly
positioned.
• Fit the lower part of the housing. (Pay attention
to the position of the dust ejection valve)
• Place the wire fasteners in the groove of the
flange on the filter housing and tighten
Safety cartridge
• Remove the main cartridge.
Do not clean the safety cartridge and,
once it has been removed, do not
use it again.
• Using a suitable tool (e.g. screwdriver), pierce
the seal (69/5) of the safety cartridge (69/3)
from the inside, then lift up the two clips (69/6).
• Grasp the safety cartridge (69/3) by the two
clips (69/6), withdraw by moving slightly to and
fro, and dispose of it.
• Insert a new safety cartridge and check that it is
correctly positioned.
• Re-install the main cartridge.
3
2
1
4
5
6
HM32-068
3.
2.
1.
Fig. 69 Air filter
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