Section 5 – BASIC MAINTENANCE
Mini-Crawler Crane M A E D A
5-10 3/2019 MC305C-3
Fuel Handling
• The fuel pump is precision equipment that
becomes inoperative if fuel containing moisture
or impurities is used.
Extra caution is required to prevent impurities
from finding their way during machine storage
and lubrication.
• Do not remove the strainer when replenishing
fuel.
• Always use fuel that meets requirements such
as grade and operating temperature defined in
the operation manual.
• Ensure that the fuel tank is filled up after
finishing daily work to prevent condensation of
the humid air inside the fuel tank that will result
in intrusion of moisture.
• Drain deposits and water out of the fuel tank
before starting the engine or approximately 10
minutes after fuel replenishment.
• The air should be released from the circuit when
the machine runs out of fuel or fuel filter
replacement is performed.
• Clean the tank and fuel system if any foreign
objects enter the fuel tank.
Stocking and Storage of Oil and
Fuel
• Stock and store oil and fuel indoors to keep
impurities such as moisture or dust out of them.
• When storing oil and fuel in drums for a long
time, line the drums horizontally aligning the
drum bungs sideways (to store them away from
moisture). Be sure to cover the drums with a
waterproof sheet if storing them outside.
• To prevent deterioration of oil and fuel resulted
from long-term storage, employ the first-in
first-out for using oil and fuel.
Grease Handling
• Grease is designed to prevent the joint from
rattling and making noise.
• A nipple that is not described in the Periodic
Maintenance chapter is used for overhauls,
which requires no grease replenishment.
Grease the nipple if a long-term use hinders its
smoothness.
• Wipe off old grease squeezed out after greasing.
Extra care is required to wipe a part that the
adhesion of sands and dust accelerates the
wearing away of the rotating part.
Filter Handling
• A filter is an extremely important part that keeps
major equipment free from impurities in oil, fuel,
and the air circuit, which prevents an associated
failure. Periodic replacement of the filter is
required in accordance with the Operation
Manual. The replacement period should be
shortened in responses to harsh operating
environments or the oil used.
• Do not reuse any washed filters (cartridge type
one) under any circumstances.
• After replacing an oil filter, check the used filter
for any metal powder.
If check finds metal powder on the used filter,
contact us or our sales service agency.
• As to a replacement filter, always unpack it
immediately prior to its use.
• Always use Maeda genuine filters.
Coolant Handling
• The river water contains a large amount of
calcium and impurities. Use of the river water
results in accumulation of water stain in the
engine and radiator, which causes heat
exchange error leading to overheat.
Do not use any non-potable water.
• Always use antifreeze following precautions
stated in the Operation Manual.
• Keep antifreeze from flame. Antifreeze is a
flammable solution.
• The mixing proportion of antifreeze varies with
outside air temperature. For more information
on mixing proportions, see "Coolant
Replacement and Internal Cleaning" on page
5-49.
• In the event of overheating, replenish coolant
with the engine cold.
• The machine low in coolant may cause
overheating and corrosion attributed to aeration.
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