Different O-Ring Seal Now Used On The Oil Pump Suction Tube
Usage:
All 3406, 3408 And 3412 Engines In All Applications
Description of Change: A different O-Ring seal is now used where the oil pump suction tube connects to the oil pump on the above engines. See the illustration. The new O-ring is of a tan color and made from Viton while the former O-ring, which is of a yellow color, is made from Silicone. After a period of time, the O-rings made from Silicone can some times take a compression set and let air get into the oil pump suction line.
Adaptable As: The 5P5846 O-Ring Seal is a direct replacement for the 9M9647 O-Ring Seal in this application. The 9M9647 O-Ring Seal is still available for use in other applications.
Location where O-ring seal is used on oil pump suction tube.
Caterpillar Information System:
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