Detroit Diesel MBE 900 Operator's Manual page 128

HOT COOLANT
To avoid scalding from the
expulsion of hot coolant, never
remove the cooling system
pressure cap while the engine is
at operating temperature. Wear
adequate protective clothing
(face shield, rubber gloves,
apron, and boots). Remove the
cap slowly to relieve pressure.
1. Open the cap on the surge tank
slowly, to allow excess pressure
to escape. Set the cap aside.
2. Open the water regulating valve
for the heating system.
3. Place a large receptacle
underneath the coolant drain
plug and open the coolant drain
plug on the bottom of the radiator.
NOTE:
Make sure the coolant can flow
unobstructed into the receptacle.
NOTICE:
Do not apply more than 140 kPa (20
psi) air pressure for a radiator flush;
more pressure could damage the
radiator or heater core.
All information subject to change without notice. (Rev. 04/08)
DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION
MBE 900 ENGINE 2007 OPERATOR'S GUIDE
4. Start radiator flushing by
attaching a flushing gun nozzle to
the radiator outlet and run water
in until the radiator is full.
To avoid injury from flying debris
when using compressed air, wear
adequate eye protection (face
shield or safety goggles) and do
not exceed 276 kPa (40 psi) air
pressure.
5. Apply no more than 140 kPa (20
psi) air pressure intermittently to
help dislodge sediment buildup in
the core.
6. Drain the radiator, and flush the
radiator until clean water flows
from the radiator. Remove the
flushing gun.
7. When the coolant has drained,
install the coolant drain plug on
the radiator.
8. Add coolant in the specified
concentration until the maximum
mark on the surge tank is reached.
9. Start the engine and run it for
about one minute at varying
speeds to release air pockets in
the cooling system. Ensure the
heater valve is still open. Check
EYE INJURY
117