M A E D A Mini-Crawler Crane Section 5 – GENERAL MACHINE MAINTENANCE
9/2020 MC285CB-3 5-49
Air Breather Inspection
WARNING! Oil may spray out when removing
the air breather cap on the hydraulic oil tank.
Unscrew the cap slightly to relieve the internal
pressure before removing it.
Tighten the cap securely after replenishing
the oil. If not fully tightened, the cap may come
loose and fall off during operation, potentially
causing burn injuries if hot oil spurts out.
CAUTION: Make sure the machine is level
before removing the air breather cap.
Be careful to avoid allowing any foreign
matter into the oil inlet opening when cleaning
the strainer.
Air Breather Filter Element Inspection
and Replacement
1. Stop the machine on a level surface.
2. See “Removing Machinery Cover” on page
5-11 and remove the machinery cover.
3. Insert a hexagonal wrench into the hole (b) in
the case (7).
Fig. 5-110
4. Twist the hexagonal wrench outward and
rotate the air breather cap (1)
counterclockwise.
Fig. 5-111
5. Remove the air breather cap (1).
6. Remove bolt (3) on the top of the detached
cap and disassemble.
Fig. 5-112
7. Inspect the filter element (4) inside the cap.
If it appears clogged with dust or dirt, replace
with a new one.
8. Reinsert the filter element inside the cover (2).
If the filter element was replaced with a new
one here, lightly apply oil with your finger to
the O-rings (5) above and below the filter
element.
9. Align the lug (a) on the bayonet (6) with the
cover (2), and secure with the bolt (3).
Tightening torque: 6.9 to 8.8 N·m (0.7 to
0.9 kgf·m)
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