2008/08/25 Caterpillar

Generator Set:

C15 GEN SET (S/N: C5E1-UP; C5H1-UP; C5L1-UP; X4R1-UP)

Description of Change: An improved water pump is now available for the engines that are listed above. The improved pump has more capacity in the weep hole chamber in order to store more coolant weepage before the coolant weepage exits the weep hole. The stored coolant now has more time in order to evaporate before the coolant exits the weep hole.

Adaptable To: The 314-5155 Water Pump Gp is a direct replacement for the 280-7374 Water Pump Gp. The new 314-5155 Water Pump Gp is adaptable back to the first production of the listed engines.

Table 1

Effective Serial Numbers

S/N:C5E01772-UP

S/N:C5H00790-UP

S/N:C5L02048-UP

S/N:X4R00396-UP

The change is effective at the factory with the engine serial numbers that are listed in Table 1.