SPRING 3N5739 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 5F-4764 Pry Bar 1
B 8T-2998 Lubricant -
C 1U-5718 Vacuum Pump 1
169-7372 Fluid Sampling Bottle -
4C-4057 Tube
7.9 mm (0.31 inch) OD -
D 4C-5552 Large Bore Brush 1
E 4C-6774 Vacuum Gun Kit 1
F 8T-7765 Surface Reconditioning Pad - Start By:
Remove the rocker arms and the rocker arm shaft.
Illustration 1 g01150587
Disconnect harness assembly (1). Note: Note the orientation of the bridge assemblies for installation purposes.
Remove bridge assemblies (3).
If the injector hold down bolt is loose during the removal procedure, inspect the injector bore for wear and debris. Replace the clamp and spacer.
Remove bolt (4), spacer (5), and clamp (6).
Place an identification mark on electronic unit injectors (2) for installation purposes. Each electronic unit injector (2) must be reinstalled in the original location in the cylinder head.
Illustration 2 g01073439
Use Tooling (A) to pry beneath the base and free electronic unit injector (2).
Remove electronic unit injector (2) from the cylinder head. Installation Procedure
Use Tooling (C) to remove the fuel and oil from the cylinder. Evacuate as much fuel and oil as possible from the cylinder before installing the electronic unit injector. Several evacuations may be necessary.
Use Tooling (D) to clean the carbon deposit from the inside of the electronic unit injector sleeve. Tooling (E) is available to clean loose material from the bore of the electronic unit injector sleeve and the cylinder.
Use Tooling (F) to clean the carbon from the seat area that is inside of the electronic unit injector sleeve.
Install the O-ring seals on the electronic unit injector. Lubricate the top two O-ring seals with a 50/50 mixture of clean engine oil and Tooling (B).
Illustration 3 g01150587
When an electronic unit injector is replaced, the new electronic injector code must be programmed into the engine's personality module software by using the calibration menu on the Electronic Service Tool. If the new electronic injector code is not entered, the characteristics of the previous electronic unit injector is assumed.If it is not possible to immediately reprogram the electronic injector code into the personality module software, the engine will not be severely harmed. The new electronic injector code should be reprogrammed as quickly as possible in order to optimize engine performance.
Install electronic unit injector (2) into the original location in the cylinder head. Note: Use new bolt (4).
Install spacer (5), clamp (6), and bolt (4). Tighten bolt (4) to a torque of 55 10 N m (41 7 lb ft).
Install bridge assemblies (3) in the orientation that was noted during removal.
Connect harness assembly (1) on electronic unit injector (2). Tighten the nuts to a torque of 2.5 0.25 N m (22 2 lb in).
Remove the air from the fuel system. Refer to Testing and Adjusting, "Fuel System - Prime". End By:
Install the rocker arms and the rocker arm shaft.