Hitachi ZAXIS 135US-5B Operator's Manual page 342

Replace Air Cleaner Element (Inner)
Replace --- When outer element is replaced
IMPORTANT: Do not clean and reuse the inner element.
1. After removing outer element (1). Clean inside the air
cleaner body (2) with clean cloth before removing inner
element (3).
2. Remove inner element (3). Replace it with new one.
MAINTENANCE
Air Cleaner Restriction Alarm Switch
7-68
1 2
3
Valve
Cover
M157-07-061