
132
Maintenance Section (D6T LGP (OEM)) WEBM1000
Cooling System Coolant Level - Check
Note: Always discard drained fluids according to
local regulations.
4. Add 1.20 L (41 oz) of Extender to the cooling
system.
5. Start the
engine. Run the engine without the filler
cap un
til the thermostat opens and the coolant
level stabilizes. Check for leaks.
6. Ma
intain the coolant level above the sight gage
in the coola
nt tank to area (3). Adding coolant
above this area will cause the coolant to overflow
the cooling system. If you need to add coolant
daily, check the cooling system for leaks.
7. Inspect filler
cap (2) and the filler cap seal for
debris, fo
r foreign material, or for damage. Clean
filler cap (2) with a clean cloth. Replace the
radiator cap if the cap gasket is damaged.
8. Install the filler
cap.
9. Close radiator access door (1).
Cooling System Coolant Level
- Check
At operating temperature, the engine coolant is
hot and under pressure.
Steam can cause personal injury.
Check the coolant level only after the engine has
been stop
ped and the fill cap is cool enough to
touch with your bare hand.
Remove the fill cap slowly to relieve pressure.
Cooling system conditioner contains alkali.
A
void co
ntact with the skin and eyes to prevent
personal injury.
This machine radiator has a surge tank. There is no
top tank in this cooling system. The surge tank has
one sight glass. Removing the filler cap is not
necessary to check the coolant level. The sight
glass for checking the daily coolant level is inside
the left engine compartment. The filler cap is at the
top of the coolant tank that is beneath the radiator
access door on the top right side of the radiator
guard.
163
Illustration 163
Rear view
1. Observe the sight glass in order to verify the
level of the coolant. If the coolant completely
covers the sight glass, the coolant level is okay. If
the coolant level is visible in the sight glass, the
coolant is low. Add coolant in order to fill the
system.
Note: The factor
y fill is Extended Life C
oolant
(ELC). Refer to Operation and Maintenance Manual,
SEBU6250, “Caterpillar Machine Fluids
Recommendations” for additional information.
Maintaining the system as ELC is preferred. See the
sections “Coolant Recommendations” and “ELC
Cooling System Maintenance”.
164
Illustration 164
Rear view
2. If additional coolant is necessary, open radiator
access door (1). Remove filler cap (2) slowly in
order to relieve the pressure.
3. Ma
intain the coolant level above the sight gage
in the
coolant tank to area (3). Adding coolant
above this area will cause the coolant to overflow
the cooling system. If you need to add coolant
daily, check the cooling system for leaks.