M A E D A Mini-Crawler Crane Section 5 – GENERAL MACHINE MAINTENANCE
9/2020 MC285CB-3 5-51
Drain Water and Sediment Inside
Hydraulic Oil Tank
WARNING! Parts will still be hot immediately
after the machine has been operating. Do not
change the oil immediately, but wait until the
oil has cooled.
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: See “LUBRICATING OIL” on page
5-7 for the oil to be used.
Be sure to arrange the machine in its
travelling posture when checking the oil level.
Checking the oil level while in the working
posture will result in overfilling, as the oil level
will be underestimated.
After replacing the hydraulic oil, do not start
the machine for a while until the pipes and
hydraulic equipment are filled with oil.
Do not fill with oil above the level point (red
dot) on the level gauge (G).
Be careful to avoid allowing any foreign
matter into the oil inlet opening when
replenishing the oil.
Container to catch contaminating water: Prepare
a container with a capacity of at least 5 L.
1. Stop the machine on a level surface.
2. See “TRAVELLING POSITION” on page 4-29
and put the machine in the “Travelling
posture”.
3. See “Removing Machinery Cover” on page
5-11 and remove the machinery cover.
4. See “Air Breather Inspection” on page 5-49
and remove the air breather cap (1) from the
oil inlet (F) on the top of the hydraulic oil tank.
Fig. 5-116
5. Place the container to catch the
contaminating water immediately below the
drain outlet cap (P).
Fig. 5-117
6. Slowly rotate the drain outlet cap (P) to avoid
splashing oil or water on yourself, and drain
the contaminating water.
7. If the drained contaminating water is found to
contain large amounts of metal particles or
other foreign matter when inspected, contact
us or our sales service agency.
8. Reattach the drain outlet cap (P).
9. Replenish the hydraulic oil via the oil inlet (F)
up to the level point (red dot) while watching
the oil level gauge (G).
10. After replenishing the oil, see “Air Breather
Inspection” on page 5-49 and securely
reattach the air breather cap (1) on the oil
inlet (F).
11. See “Installing Machinery Cover” on page
5-11 and install the machinery cover.
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