Volvo FM Handbook page 552

14 Check that the hoses to and from the filter
housing are not damaged and that hose clips are
tight
15 Check that the rubber bellows between the cab
and the chassis are tight against the mating
surface
16 Check that the rubber valves are intact
Changing secondary filter
Change the secondary filter after changing every third
primary filter or at least every 48 months.
1 Loosen the hose clip that is securing the filter
element (see illustration)
2 Pull out the filter element
3 Lubricate the steel pipe end with the
accompanying silicon grease. Lubricate the part
to be mounted in the rubber filter housing
connection as well as the sealing surface for the
primary filter. Use only silicon grease. Mineral
oils will ruin the seal and the rubber connection
4 Put in the new secondary filter
5 Press in the filter until it bottoms
6 Write the date of the change on the end of the
filter
7 Fit the primary filter
8 Fit the cover
9 Tighten the retaining bolts
10 Tighten the hose clip that is securing the
secondary filter in the air cleaner
Maintenance 541
Note!
Do not touch the filter unnecessarily.
The filter must not be reused!
Note!
If the control lamp lights after a
primary filter change, then even the
secondary filter shall be changed, if
fitted.
J0008170