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PAGE 32 — SG1400C3 STUDIO GENERATOR • OPERATION AND PARTS MANUAL — REV. #1 (02/15/12)
INSPECTION/SETUP
COOLANT (ANTIFREEZE/SUMMER COOLANT)
Cummins recommends antifreeze/summer coolant, for use
in their engines, which can be purchased in concentrate (and
mixed with 50% demineralized water) or pre-diluted. See the
Cummins Engine Owner’s Manual for further 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 12 for engine, radiator, and recovery tank 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, be certain the proper
amount of antifreeze (Table 13) has been added.
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.
Table 12. Coolant Capacity
Engine and Radiator 7.8 gal (29.5 liters)
Reserve Tank 6 quarts (6.6 liters)
Table 13. Anti-Freeze Operating Temperatures
Vol %
Anti-
Freeze
Freezing Point Boiling Point
°C °F °C °F
50 -37 -34 108 226
NOTICE
When the antifreeze is mixed with water, the antifreeze
mixing ratio must be less than 50%.
CLEANING THE RADIATOR
The engine may overheat if the radiator fins become
overloaded with dust or debris. Periodically clean the
radiator fins 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 is necessary. Inspect it in
accordance with the Cummins Engine Owner’s Manual.
FAN BELT TENSION
A slack drive belt may contribute to overheating, or to
insufficient charging of the battery, adjust drive belt in
accordance with the Cummins Engine Owner’s Manual.
DRIVE BELT INSPECTION
Inspect the drive belt for damage and wear. Horizontal
(across the belt) cracks are acceptable. See Figure 16
below. Vertical (direction of belt ribs) cracks that intersect
with horizontal cracks are not acceptable.
If the drive belt is frayed, punctured, or material is missing
do not use drive belt.
Figure 16. Drive Belt Inspection
NO
NO
CAUTION
NEVER place hands near the belts or fan
while the generator is running.