157 S650 Operation & Maintenance Manual
ENGINE COOLING SYSTEM (CONT’D)
Checking Level
Open the rear door and raise the rear grille.
Figure 227
Check coolant level using the level markers (Item 2)
[Figure 227] on the tank. Coolant must be between top
and bottom level markers 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.
Lower the rear grille and close the rear door.
IMPORTANT
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
Removing And Replacing Coolant
For the service interval for replacing the engine
coolant (See SERVICE SCHEDULE on Page 131.)
Open the rear door and remove the rear grille.
Remove the coolant fill cap (Item 1) [Figure 227].
Figure 228
Disconnect the coolant hose (Item 1) [Figure 228] from
the oil filter assembly. Drain the coolant into a container.
Connect the coolant hose to the oil filter assembly.
Recycle or dispose of coolant in an environmentally safe
manner.
Mix new coolant in a separate container.
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.
Add premixed coolant, 47% water and 53% propylene
glycol to the coolant tank until the coolant level reaches
the lower marker on the tank [Figure 227].
Install the coolant fill cap.
NOTE: When installing the coolant fill cap, the cap
must be tightened until it clicks.
Run the engine until it is at operating temperature. Stop
the engine. Check the coolant level when cool. Add
coolant as needed.
Install the rear grille and close the rear door.
P-90529C
2
1
P-85606
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