167 S450 Operation & Maintenance Manual
ENGINE COOLING SYSTEM (CONT’D)
Checking And Adding Coolant
Check the engine coolant level every day before starting
the engine for the work shift.
Stop the engine, open the rear door, and remove the rear
grille. (See REAR GRILLE on Page 150.)
Figure 227
Coolant must be between the top and bottom level
markers (Item 2) [Figure 227] when the engine is cold.
NOTE: The loader is factory filled with propylene
glycol coolant (purple colour). DO NOT mix
propylene glycol with ethylene glycol.
Use a refractometer to check the condition of propylene
glycol in your cooling system.
AVOID INJURY
Stop the engine and allow to cool before adding
coolant or you can be burned.
W-2106-0907
Remove the coolant fill cap (Item 1) [Figure 227] to add
coolant.
The correct mixture of coolant to provide a -37°C (-34°F)
freeze protection is 5 L propylene glycol mixed with 4,4 L
of water OR 1 U.S. gal propylene glycol mixed with 3.5 qt
of water.
AVOID ENGINE DAMAGE
Always use the correct ratio of water to antifreeze.
Too much antifreeze reduces cooling system
efficiency and may cause serious premature engine
damage.
Too little antifreeze reduces the additives which
protect the internal engine components; reduces the
boiling point and freeze protection of the system.
Always add a premixed solution. Adding full strength
concentrated coolant can cause serious premature
engine damage.
I-2124-0497
Add premixed coolant, 47% water and 53% propylene
glycol to the coolant tank until the coolant level reaches
the upper level marker on the tank [Figure 227].
Install the coolant fill cap [Figure 227].
NOTE: The coolant fill cap must be tightened until the
cap clicks.
Install the rear grille and close the rear door.
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