TUBE AS 3338171 - Caterpillar

Removal Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Turn the disconnect switch to the OFF position.
Remove the fuel injection nozzle cover. Refer to Disassembly and Assembly Manual, "Fuel Injection Nozzle Cover - Remove and Install".
Remove the fuel injection lines. Refer to this Disassembly and Assembly Manual, "Fuel Injection Lines - Remove".
Illustration 1 g01155252
Disconnect the harness assembly from the connector (4) on the bus bar (1).
Loosen the nuts (2) that secure the bus bar (1) to the glow plugs (3).
Remove the bus bar (1) from the glow plugs (3).
Remove the glow plug (3) from the cylinder head. Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g01155252
Clean the threads of the glow plug (3).
Install the glow plug (3) in the cylinder head. Tighten the glow plug to a torque of 18 N m (13 lb ft).
Position the bus bar (1) on the glow plugs (3). Tighten nuts (2) on the glow plugs to a torque of 2 N m (17 lb in).
Connect the harness assembly to the connector (4) on the bus bar (1).
Install the fuel injection lines. Refer to Disassembly and Assembly Manual, "Fuel Injection Lines - Install".
Install the fuel injection nozzle cover. Refer to Disassembly and Assembly Manual, "Fuel Injection Nozzle Cover - Remove and Install".
Turn the disconnect switch to the ON position.