Degreasing - Detroit Diesel MBE 900 Operator's Manual

HOW-TO SECTION
detailed procedures, see the
vehicle/chassis maintenance
manual. For types of coolant,
refer to the "How to Select
Coolant" section in this guide.
4. If the HVAC unit is connected
to the cooling system, open the
regulating valves all the way.

Degreasing

Degrease as follows:
1. Fill the cooling system with a 5%
solution (1.6 ounces per quart of
water—50 grams per liter) of a
mildly alkaline cleaning agent,
such as sodium carbonate.
2. Run the engine at moderate speed
until the thermostat starts to open,
at an operating temperature of
approximately 80°C (176°F).
Then run it for about five minutes
longer. Shut down the engine and
allow it to cool to approximately
50°C (112°F).
100
DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION
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.
3. Drain all the cleaning solution.
4. Flush the cleaning solution from
the cooling system.
[a] Immediately after draining
the cleaning solution, flush
the system with clean water.
[b] Once the clean water has
drained, fill the system again
with clean water.
[c] Run the engine. Allow
the engine to warm up to
approximately 80°C (176°F),
and then run it about five
minutes longer.
[d] Drain the hot water.
5. Fill the cooling system with new
coolant. For detailed procedures,
see the vehicle/chassis
maintenance manual. For
types of coolant, "Refer to the
All information subject to change without notice. (Rev. 04/08)