2015/01/21 Caterpillar


New Water Lines Group And Oil Cooler Group Are Used On Certain MT4400D Off-Highway Truck Engines {1378, 1380}

Usage:

MT4400D AC MH4


Off-Highway Truck:
CAT MT4400D AC (S/N: MH41-UP; MT41-UP)

Description of Change: The new water lines group and oil cooler group that are used will improve the cooling capacity of the engine cooling system.

Adaptable To: The new and previous parts for this change are listed in Table 1. The effective serial numbers for this change are listed in Table 2.

ReferenceRefer to Special Instruction, REHS9679, "Installation of the Water Lines Group and Oil Cooler For Certain MT4400D Off-Highway Trucks" for the installation procedure.

Table 1
New Part Number     Part Description     Previous Part Number    
440-8358
375-7420    
Engine Oil Cooler Gp
Engine Oil Cooler Gp    
392-4069    
147-0820     Engine Oil Lines Gp     9Y-8902    
450-6349     Fumes Disposal Gp     342-1369    

Table 2
Effective Serial Numbers    
S/N:MH400804-UP    
S/N:MT400809-UP    

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