MBE4000 APPLICATION AND INSTALLATION
Cleanliness
All new air charge cooling system components must be thoroughly clean and free of any casting
slag, core sand, welding slag, etc. that may break free during operation. These foreign particles
can cause serious engine damage.
Leakage
Leaks in the air-to-air cooling system can cause a loss in power, excessive smoke and high
exhaust temperature due to a loss in boost pressure. Large leaks can possibly be found visually,
while small heat exchanger leaks will have to be found using a pressure loss leak test.
PRESSURIZED CHARGE COOLER SYSTEM
To avoid eye or face injury from
fl
ying debris, wear a face
shield or goggles.
Check for leaks as follows:
1. Disconnect the charge air cooler.
2. Plug the inlet and outlet.
3. Measure pressure loss using an adaptor plug on the inlet.
The charge air cooler is considered acceptable if it can hold 25 psi (172 kPa) pressure with less
than a 5 psi (34.5 kPa) loss in 15 seconds after turning off the hand valve.
Size
The size of the heat exchanger depends on performance requirements, cooling air
fl
ow available,
and usable frontal area. Using the largest possible frontal area usually results in the most ef
fi
cient
core with the least amount of system pressure drop. Consult your supplier to determine the
proper heat exchanger for your application.
Cooling Air Flow Restriction
Core selection and location must meet charge air system temperature and pressure drop limits,
and must be compatible for good coolant radiator performance. Charge air coolers have a cooling
air
fl
ow restriction typically between 0.75 and 1.5 in. H
2
O (.19 and .37 kPa).
All information subject to change without notice.
(Rev. 03/06)
4-17
7SA250 0603
Copyright © 2006 DETROIT DIESEL CORPORATION
