DCA1100SSC 60 HZ GENERATOR • OPERATION MANUAL — REV. #1 (01/17/18) — PAGE 41
MAINTENANCE
DRAINING ENGINE COOLANT
1. Remove the radiator pressure cap (Figure 57) only if
the coolant tempeature is below 120°F (50°C).
Figure 57. Radiator Pressure Cap Removal
2. Remove the coolant (Figure 58) bolt or
OPEN the drain
valve on the radiator and allow the coolant to drain into
a suitable container.
Figure 58. Draining Engine Coolant
WARNING
DO NOT remove the pressure cap from the radiator
when the engine is hot! Wait until the coolant
temperature is below 120°F (50°C) before removing
pressure cap.
Heated coolant spray or steam can cause severe
scalding and personal injury.
°F
WATER TEMP
100
140
180
220
260
°F
WATER TEMP
100
140
180
220
260
CORRECT
PRESSURE
CAP
DRAIN
BOLT
3. After the cooling system is completely drained,reinstall
the coolant drain bolt or
CLOSE the drain valve on the
radiator.
FLUSHING RADIATOR
1. Remove radiator cap.
2. Open radiator drain cock/valve located at the bottom of
the radiator and drain coolant into a suitable container.
3. If equipped, remove the overflow tank. Drain and clean
overflow tank.
4. Replace the overflow tank if necessary.
5. Check hoses for softening and kinks. Check clamps
for signs of leakage.
6. Flush the radiator by running clean tap water through
radiator until signs of rust and dirt are removed.
DO
NOT clean radiator core with any objects, such as a
screwdriver.
7. Replace with coolant as recommended by the engine
manufacturer. Reference Table 2 for coolant capacity.
8. Tighten drain cock and close radiator cap tightly.
COOLANT (ANTIFREEZE/SUMMER COOLANT/
WATER)
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 Operation and Maintenance Manual for further
details.
WARNING
Allow engine to
cool when flushing out
radiator. Flushing the radiator while hot
could cause serious burns from water or
steam.
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.
