4-20. RADIATOR AND COOLING SYSTEM.
4-20.1 Radiator and Shutter Assembly.
This task covers
Shop Equipment, Automotive
22, Appendix E Pipe Sealant
Maintenance and Repair,
25, Appendix E Sealant
104065 Radiator Lifting Beam
PERSONNEL REQUIRED - 3
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
Engine Compartment Covers Removed (see para.
Roof Canopy Removed (see para. 4-12.11)
(Including Air Filter)
Truck Wheels Blocked
All Air Tanks Drained
Engine coolant can cause severe burns. Allow engine to cool before attempting to maintain
The radiator can only be removed through roof canopy. The workshop should be equipped
with an overhead crane with a ground clearance of at least 16 ft (4.9 m). The radiator weighs
300 lb (135 kg).
(1) Drain the radiator via the valve (1) on the right-hand side of the radiator. Cooling system capacity is
about 16 gal (60 L).
Remove drain hose (2) and handle (3). Then unscrew drain valve (1) and nipple (4) from radiator (5).
(3) Tag and disconnect air line (6) between multistat and fan clutch, and air line (7) between multistat
and radiator shutter. Disconnect hoses at multistat (8).
(4) Loosen four gear clamps (9). Pull upper hoses (10) from radiator connection. Remove clamp (11) and
pull hose (12) from radiator connection. Twist upper tubes (12) 1/4 turn inward.
(5) Loosen radiator connection on hose (13) and remove radiator overflow hose (14). Position hoses so
they do not interfere with removal.