4-45. FAN SHROUD.
4-50. Examine hoses at least twice each year for cracks,
4-46. The fan shroud directs air flow through the radiator
hardening, softening and swelling. Remove the hose and
with a minimum loss of air due to turbulence. On Detroit
check the interior section. Hoses can deteriorate on the
Diesel units, the four capscrews securing the shroud can
inside and appear satisfactory on the outside. The
be loosened so that the shroud can be moved up or down
for proper positioning with respect to the fan blades. DO
Hose, must be pliable and able to pass coolant without
NOT ALTER, ADD TO, OR REMOVE THE SHROUD.
Check to see that it is anchored securely and not bent
from its original shape. The depth that the fan penetrates
4-51. FLUSHING THE SYSTEM.
into the shroud is critical and should not be altered.
4-47. WATER PUMP.
4-52. Rust in the radiator or coolant indicate c that the
corrosion inhibitor has lost its effectiveness. This can be
avoided by draining and flushing the system at least once
4-48. The water pump should be checked for leaks after
each 50 hours of operation. Water pump leaks may allow
each year. For effective flushing, remove the radiate,
air to be drawn into the cooling system. This can cause
hoses and the thermostat. Open the engine
foaming or overheating. Repair or replace the pump
immediately if leakage occurs.
FIGURE 4-16. ENGINE COOLANT DRAIN COCKS.