TUBE A-BY-PASS 2L4466 - Caterpillar

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Reports have been received that the 416-5886 Fuel Transfer Pump Gp and the 416-5884 Fuel Filter As have low hour failures on the machines listed above. However, most of the pumps returned from the field operate properly when tested. The machines may exhibit symptoms of low power and or may not start, if the engine is not receiving enough fuel.Solution
In the event of failure, follow the rework procedure for diagnosing and troubleshooting the fuel transfer pump and the fuel filter assembly before replacing these parts.Rework Procedure
Illustration 1 g06209322
*Fuel pump circuit remains powered for 30 seconds after key-on unless engine is started
Illustration 2 g06209364