TM 1-1500-204-23-10
e.
Drain and Fill Radiator. The engine cooling system is shipped with the proper mixture of coolant solution for
operation at temperatures above 0° F. If operating temperatures are below 0° F, the coolant solution must be
drained and filled. See step (7).
(1)
Remove four hex washer head bolts (1) and lock washers (2). Discard lock washers.
Figure 4-8. Coolant Draining and Filling
(2)
Open airblock (3).
(3)
Remove radiator filler cap (4).
(4)
Place pan (section II, appendix D) under radiator drain cock (5).
(5)
Open drain cock (5) and wait for all coolant solution to drain out. Contact your local environmental officer
for guidance on how to properly dispose of coolant solution in accordance with local regulations.
NOTE
A drain cock is also provided on the curbside of the engine block. This drain cock is to be
used only to ensure that engine has been totally drained of coolant should the unit be stored
without proper antifreeze mix during freezing temperatures.
(6)
Close drain cock (5).
4-9
