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ProDieselParts
Premium Parts
Seal – O-Ring – By Pass Valve Engine Cummins NT855
$0.44
— OR —
Installed in the fan hub/pulley assembly; it prevents oil or lubricant leakage.
Cummins primarily specifies use on 14-liter engines of the 855 family; the exact application must be verified using the engine serial number.
Note: Do not confuse the oil seal (part no. 200307) alone with a complete fan hub, which some sellers incorrectly advertise using the same number.
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