Service manual

Group 170 Preventive Maintenance

Check Air Dryer

Air Dryers

For further information refer to Function Group 5.

For further information concerning component speciﬁca-

tions see service information in Group 1, “Oil and Filter

Change Intervals for Volvo Components, All Models”,

Publication Number 175-001, and any appropriate ven-

dor literature.

Air Dryers have internal maintenance systems that clean

out the accumulated moisture frequently and can there-

fore work with long maintenance intervals. Eventually the

drying medium ﬁlls up and needs replacement. Change

the cartridge when the medium is ﬁlling up more than

usual. This service rate varies upon the application.

Dryer manufacturers recommended changing cartridge

every two to three years but intervals vary per applica-

tion. The only dryer with regular maintenance is the

Midland, which requires changing of the coalescent ﬁl-

ters every year.