BEARING-UPPER 3B6479 - Caterpillar

Illustration 1 g00736817
(1) Fuel priming pump plunger
Turn the fuel priming pump plunger counterclockwise in order to release the lock plate from the retainer.
Operate the fuel priming pump until the air in the fuel system has been pumped through the fuel return line back to the fuel tank.
Press the fuel priming pump plunger to the locking position. Turn the fuel priming pump plunger clockwise in order to engage the lock plate in the retainer. Note: Enable the starting system only after all maintenance has been completed.Priming Procedure for Dry Starting
If the air cannot be completely purged from the fuel system and the engine will not start, see Special Instruction, SEHS9586, "3500 EUI Fuel Priming Procedure".