PLUG 3T8237 - Caterpillar

Assembly Procedure
Hand Priming Pump (if equipped)
Illustration 1 g00732631
Hand Priming Pump (1) Cap ring (2) Priming button (3) Diaphragm (4) Spring cap (5) Spring (6) Valve plate (7) O-ring seal (8) Fuel filter base
Apply a thin film of clean engine oil to O-ring seal (7) and to valve plate (6) .
Insert valve plate (6) into fuel filter base (8). The valve plate must be installed with the O-ring (7) first. Ensure that the rubber valve extends through the center hole of fuel filter base (8). Push valve plate (6) firmly into the correct position.
Improper assembly of parts that are spring loaded can cause bodily injury.To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Install spring (5) into valve plate (6) and place spring cap (4) on top of the spring.
Install rubber diaphragm (3) into priming button (2). Ensure that diaphragm (3) fits firmly into the correct position. Place the assembly over spring cap (4) .
Install cap ring (1) over priming button (2). Depress priming button (2) until diaphragm (3) is seated firmly onto fuel filter base (8). Tighten cap ring (1) hand tight while the priming button (2) is depressed.
Prime the fuel system. Refer to Testing and Adjusting, "Fuel System - Prime" for more information.