GEAR SUN 3P8163 - Caterpillar

TECHNICAL INFORMATION BULLETIN July 14, 2004
INDUSTRIAL ENGINES 3406E (6BR1-02230)
3456 (3LW1-Up)
C-15 (BEM1-Up)
C-16 (BFM1-Up)
Component Code: 1354SUBJECT: RADIATOR EXPANSION TANK OVERFLOWS
PROBLEM:
Engine coolant is overflowing from the expansion tank. There are two ports located on the side of the water pump, a high-pressure port and a low-pressure port. The 5P-1251 Hose (bulk) for the shunt line is connected to the high-pressure port instead of the low-pressure port. The shunt line hose must be relocated to the low-pressure port. There are also reports that OEM?s have plumbed shunt line hoses into the high-pressure port.
SOLUTION:
Remove the plug from the low-pressure port. Relocate the shunt line hose connection to the low-pressure port on the water pump, see picture below. Install the plug into the high-pressure port. This change is effective with 6BR02231-Up production and with change level 04 for the 156-9801 Expansion Tank Group.
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