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PAGE 24 — LT12 SERIES LIGHT TOWER • OPERATION MANUAL — REV. #12 (01/20/09) 
INSPECTION
COOLANT 
It is recommended that antifreeze/summer coolant be used 
with the engine. This can be purchased pre-diluted or in 
concentrate and mixed with 50% demineralized water. See 
engine owner's manual for more details.
Day-to-day addition of coolant is done from the recovery 
tank. When adding coolant to the radiator, DO NOT remove 
the radiator cap until the unit has completely cooled. 
See Table 6 for engine and radiator, coolant capacities. 
Make sure the coolant level in the recovery tank is always 
between the "H" and the "L" markings.
OPERATION IN FREEZING WEATHER
When operating in freezing weather, make sure the proper 
amount of antifreeze (Table 7) has been added.
  WARNING
When connecting the positive (+) cable 
to the battery's positive (+) terminal post, 
DO NOT allow the wrench or any metallic 
part to come in contact with the battery's 
negative (-) terminal post. This may result in an electrical 
short circuit or an explosion.
 NOTICE
Use only distilled water in the battery. Tap water can 
reduce the operating life of the battery.
  WARNING
If adding coolant/antifreeze mix to the 
radiator, DO NOT remove the radiator cap 
until the unit has completely cooled. The 
possibility of hot coolant exists which can 
cause severe burns.
Coolant Capacity
Table 6. 
Engine Type
Coolant  Capacity
Perkins 103-10
5 qt. (4.7 liters)
Lombardini LDW 1003
5.18 qt. (4.9 liters)
Deutz F3M1008F
5.18 qt. (4.9 liters)
CLEANING THE  RADIATOR
The engine may overheat if the radiator fins become 
overloaded with dust or debris. Periodically clean the 
radiator fi ns with compressed air. Cleaning inside the 
machine is dangerous, so clean only with the engine turned 
off and the negative battery terminal disconnected.
AIR CLEANER
Periodic cleaning/replacement of the air cleaner is 
necessary. Inspect it in accordance with the engine owner's 
manual.
FAN BELT TENSION
A slack fan belt may contribute to overheating, or to 
insuffi cient charging of the battery. Inspect the fan belt for 
damage and wear and adjust it in accordance with the 
engine owner's manual.
The fan belt tension is proper if the fan belt bends 10 to 15 
mm when depressed with the thumb as shown in Figure 9.
Fan Belt Tension
Figure 9. 
Anti-Freeze Operating Temperatures
Table 7. 
Vol  (%)
Anti-Freeze
Freezing Point
Boiling Point
°C
°F
°C
°F
40
-24
-12
106
222
50
-37
-34
108
226
 NOTICE
When the antifreeze is mixed with water, the antifreeze 
mixing ratio must be less than 50%.
  WARNING
Never place hands near the belts or fan 
while the engine is running.