TM 5-2420-230-24-2
Cooling System (008-018)
B3.9 and B5.9 Series Engines
Page 8-16
Section 8 - Cooling System - Group 08
WARNING
Coolant is toxic. Keep away from children and pets. If
not reused, dispose of in accordance with local envi-
ronmental regulations.
Drain the cooling system by opening the drain valve on the
radiator and removing the plug in the bottom of the water
inlet. A drain pan with a capacity of 19 liters [5 gal] will be
adequate in most applications.
Check for damaged hoses and loose or damaged hose
clamps. Replace as required. Check the radiator for leaks,
damage, and buildup of dirt. Clean and replace as required.
Clean (008-018-006)
CAUTION
During filling, air must be vented from the engine cool-
ant passages. The air vents through the jiggle pin open-
ings to the top radiator hose and out the fill opening.
Additional venting is provided for engines equipped
with an aftercooler. Open the petcock during filling.
NOTE: Adequate venting is provided for a fill rate of 19 liters
per minute [5 U.S. gallons per minute].
CAUTION
Do not install the radiator cap. The engine is to be
operated without the cap for this process.
Fill the system with a mixture of sodium carbonate and
water (or a commercially available equivalent).
NOTE: Adequate venting is provided for a fill rate of 19 liters
per minute [5 U.S. gallons per minute].
L-1072
