POWER TRAIN MLC300 SERVICE/MAINTENANCE MANUAL
7-14
Published 11-22-17, Control # 257-02
ENGINE RADIATOR
Checking the Coolant Level
See Figure 7-13 for the following procedure.
For service other than checking the coolant level, refer to the
engine manufacturer’s manual for instructions.
Check the coolant level daily (at the start of the shift) when
the engine is cold.
The coolant should be at the full cold level specified on the
level decal (5). If necessary, add coolant as follows:
1. Remove the enclosure cover (4).
2. Take care to prevent being burned from hot coolant as
follows.
a. Place a heavy cloth over the fill cap (1).
b. Turn the fill cap counterclockwise until the pressure
starts to release (indicated by a hissing sound).
c. Wait for the pressure to escape completely.
d. Turn the fill cap fully counterclockwise and remove
it.
3. Slowly add coolant to the expansion tank (2) until the
coolant is at the proper level on the sight gauge (3).
4. Securely install the fill cap (1).
5. Install the enclosure cover (4).
Draining and Re-Filling the Cooling System
See Figure 7-13 for the following procedure.
NOTE: The cooling system has a quick-drain valve (7) that
requires using the quick-drain drainer assembly
(see Figure 7-12
) to drain the coolant. The quick-
drain drainer assembly is stored in the parts box
supplied with the crane.
Drain the cooling system every 1,000 hours of operation or
semi-annually, whichever occurs first.
1. Insert the quick-drain hose into a suitable container that
can hold 95 L (25 gal) of coolant.
2. Remove the enclosure cover (4).
3. Take care to prevent being burned from hot coolant as
follows.
a. Place a heavy cloth over the fill cap (1).
b. Turn the fill cap counterclockwise until the pressure
starts to release (indicated by a hissing sound).
c. Wait for the pressure to escape completely.
d. Turn the fill cap fully counterclockwise and remove
it.
WARNING
Burn Hazard!
Hot and pressurized coolant can burn, causing serious
injury. Do not remove the coolant fill cap while the coolant
is hot. Wait for it to cool.
Material Hazard!
Coolant is toxic. Do not ingest. Dispose of in accordance
with all local and other applicable environmental
regulations.
CAUTION
Avoid Engine Damage!
The required coolant level must be maintained to prevent
engine damage.
CAUTION
Avoid Engine Damage!
The required supplemental coolant additive (SCA)
concentration must be maintained to prevent engine
damage.
SCA must be added to the cooling system to prevent liner
pitting and for scaling protection.
Check the SCA concentration according to the schedule
in the engine manufacturer’s operator manual and per the
manufacturer’s warnings, cautions, and instructions.
Item Description
1 Quick-Drain Drainer
2 Hose Clamp
3Drain Hose
FIGURE 7-12
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