ARMY TM 9-6115-464-12
AIR FORCE TO 35C2-3-445-1
NAVY NAVFAC P-8-624-12
3-27 RADIATOR (Figure 1-4).
a.
Inspection.
(1) Check radiator core air passages for obstructions to airflow and bent cooling fins.
(2) Check for leaks, loose connections, insecure mounting and excessive corrosion.
Scalding can result from steam escaping from the coolant system when the
radiator cap is removed. Always allow coolant to cool and remove the radia-
tor cap slowly to permit any pressure to escape.
(3) Open the radiator cap access door, remove the radiator cap and check the coolant level. Check for
accumulations of rust or scale in the radiator.
(4) Check radiator hoses and coolant lines for deterioration and leaks.
b. Service.
(1) To add coolant to the radiator, proceed as follows:
(a) Open the radiator cap access door.
(b) Remove the radiator cap.
Do not add coolant to an overheated engine unless it is running.
(c) Add coolant, as specified on the coolant specification tag, to the radiator. Leave the coolant level
approximately 2 inches below the ovefflow pipe to allow for expansion.
(2) To flush the radiator, proceed as follows:
(a)
(b)
(c)
(d)
(e)
(f)
(9)
(h)
(i)
(j)
Remove the radiator cap to facilitate drainage.
Open the coolant drain cock at the bottom of the shutter control thermostat housing and allow
the coolant to drain into a suitable container.
Close the coolant drain valve.
Fill the radiator with clean water and install the radiator cap; approved cleaning compounds may
be used.
Refer to paragraph 2-6 and start the engine.
Allow the engine to operate until normal operating temperature is reached.
Refer to paragraph 2-7 and stop the engine. Open the coolant drain valve to drain the water.
Close the coolant drain valve.
Fill the radiator with coolant as specified in Table 2-1 and attach a tag specifying the coolant
used.
Refer to paragraph 2-6 and start the engine and allow it to operate until normal operating tem-
perature is reached.
3-7
