MQ Power WHISPERWATT DCA150SSJU4F2 Operation Manual page 55

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.
1. Remove the radiator pressure cap (Figure 73) only if
the coolant temperature is below 120°F (50°C).
CORRECT
180
140
220
°F
100
260
WATER TEMP
PRESSURE
CAP
Figure 73. Radiator Pressure Cap Removal
2. Open the cabinet door and 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
DCA150SSJU4F2/F3 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (02/16/22) — PAGE 55
180
140
220
°F
100 260
WATER TEMP
COOLANT
DRAIN VALVE
(OPEN)
FLUSHING OUT THE RADIATOR
AND REPLACING COOLANT
„ Open both cocks located at the crankcase side and at
the lower part of the radiator and drain the coolant. Open
the radiator cap while draining. Remove the overflow
tank and drain.
„ Check hoses for softening and kinks. Check clamps for
signs of leakage.
„ Tighten both cocks and replace the overflow tank.
„ Replace with coolant as recommended by the engine
manufacturer.
„ Close the radiator cap tightly.
„ 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.
RADIATOR CLEANING
The radiator (Figure 75) should be sprayed clean 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
MAINTENANCE