Detroit Diesel MBE 900 Operator's Manual page 138

Problem—The Coolant Temperature Is Below Normal
Cause
The coolant temperature gauge and/or
sensor is not reading correctly.
The thermostat is not operating
properly.
The fan is not operating properly.
Problem—The Cooling System Is Losing Coolant
Cause
There is an external coolant leak.
The radiator cap is leaking.
The air compressor head is damaged.
The cylinder head gasket is leaking.
Top tank is leaking.
EGR system has an internal leak.
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
Bring the vehicle to an authorized
repair facility for service.
Have an authorized repair facility
replace the thermostat.
Bring the vehicle to an authorized
repair facility and have the fan hub
checked.
Bring the vehicle to an authorized
repair facility and have the parameter
settings reprogrammed in the MCM
or CPC.
Repair the leaking component.
Replace the radiator cap.
Have an authorized repair facility
replace the air compressor.
Have an authorized repair facility
replace the head gasket.
Bring the vehicle to an authorized
repair facility.
Bring the vehicle to an authorized
repair facility.
Remedy
Remedy
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