Hitachi 120-3 class Operator's Manual page 246

MAINTENANCE
16. When replacing the air cleaner filter element, replace
1 2
Air Restriction Switch
both outer (1) and inner (3) elements together. Remove
outer element (1). Clean the filter interior before remov-
ing inner element (3). Remove inner element (3). First
install inner element (3) and then install outer element (1).
IMPORTANT: Do not reuse the inner element. Always re-
Cover
place the new one.
3
Valve
M157-07-061
7-54