Maeda MC405C-3 - Cleaning Inside Engine Cooling System

Section 5 – GENERAL MACHINE MAINTENANCE Mini-Crawler Crane M A E D A
5-74 1/2019 MC405C-3
10. Press the button on the dust indicator (1) to
return the red piston.
Fig. 5-189
11. Reattach the machinery cover as described
in "Installing Machinery Cover" on page 5-
18.
Cleaning Inside Engine Cooling
System
WARNING!
• Coolant temperature is high immediately
after stopping the engine and pressure is
accumulated in the radiator. Removing the
cap in this state for discharging water may
cause burns. Allow it to cool down, and
then slowly turn the cap to relieve the
pressure.
• Start and clean the engine. Before standing
up from the operator’s seat or leaving it, set
the lock lever to LOCK.
• For starting the engine, see "Pre-Start
Inspection - Before Starting Engine" on
page 5-24 and "STARTING ENGINE" on
page 4-18.
• While cleaning, the engine is kept running,
and thus it is dangerous to stay in the rear
of the engine. While running the engine
never enter the rear section of the machine.
Stop the machine on a level place and perform
cooling system cleaning or coolant replacement.
Cooling system cleaning and coolant
replacement should conform to the cycles
specified in the following table.
Coolant type
Cooling system cleaning and
replacement
Super
coolant AF-
NAC
Every 2 years (in fall) or every
2000 hours, whichever falls
first
While the mixing proportion of coolant varies with
temperature, a volumetric proportion of 30% at a
minimum is required.
Even in areas where anti-freezing is not needed,
use the super coolant at a minimum proportion of
30%to prevent corrosion of cooling system.
The mixing proportion of water and coolant is
determined with respect to past minimum
temperatures, in accordance with "Mixing
proportion of water and coolant" shown below.
For actual mixing, set temperature approx. 10°C
lower than minimum temperature.
Freezing temperature of 100% undiluted super
coolant is -15°C. Be careful not to store the
undiluted super coolant below -15°C.
[Table of Mixing Proportion of Water and
Super Coolant]
Min.
temperature
(°C)
Mixed
quantity (L)
-10
or
more
-15 -20 -25 -30
Super coolant
quantity
1.7 2.0 2.3 2.5 2.8
Water amount 3.8 3.5 3.2 3.0 2.7
WARNING!
• Since the undiluted super coolant is
flammable, be cautious of fire.
• The super coolant is toxic. When removing
the drain plug, be careful not to get exposed
to splashes of the super coolant solution. If
it gets in the eyes, wash immediately and
thoroughly with water and seek medical
attention.
• The disposal of coolant added with the
super coolant discharged when replacing
the coolant and repairing the radiator
should be consigned to a specialised
subcontractor, or contact us or our sales
service agency. Since the super coolant is
toxic, never drain it into drainage or sprinkle
it on the ground.
CAUTION: For the coolant, use genuine
Maeda super coolant (AF-NAC). Use of any
other coolants than genuine Maeda super
coolant (AF-NAC) is not recommended in
principle.