PAGE 54 — DCA400SSI4F/DCA400SSI4F3 60 HZ GENERATOR • OPERATION MANUAL — REV. #3 (04/18/22)
DRAINING ENGINE COOLANT
1. Remove the radiator pressure cap (Figure 73) only if
the coolant temperature is below 120°F (50°C).
Figure 73. Radiator Pressure Cap Removal
2. Place the
coolant drain valve
in the
OPEN
position
(Figure 74) and allow the coolant to drain into a suitable
container.
Figure 74. 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 the 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
COOLANT
DRAIN VALVE
(OPEN)
MAINTENANCE
FLUSHING OUT THE RADIATOR
AND REPLACING COOLANT
Check hoses for softening and kinks. Check clamps for
signs of leakage.
Remove and inspect the radiator cap.
Flush the radiator by running clean tap water through
the radiator until signs of rust and dirt are removed.
DO NOT
clean the radiator core with any objects, such
as a screwdriver.
Tighten the water cock and replace the overflow tank.
Place the coolant drain valve in the
CLOSED
position.
Replace with coolant as recommended by the engine
manufacturer.
Reinstall the radiator cap. Tighten securely.
RADIATOR CLEANING
The radiator (Figure 75) should be sprayed (cleaned) with
a high-pressure washer when excessive amounts of dirt
and debris have accumulated on the cooling fins or tube.
When using a high-pressure washer, stand at least 5 feet
(1.5 meters) away from the radiator to prevent damage to
the fins and tube.
Figure 75. Radiator Cleaning
WARNING
Allow the engine to
cool
before flushing
out the radiator. Flushing the radiator while
hot could cause serious burns from water
or steam.
