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GUARD AS-LH 3727931 - Caterpillar

3727931 GUARD AS-LH Caterpillar parts GUARD
Alternative (cross code) number:
Caterpillar 3727931 GUARD AS-LH

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Installation Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
B     8T-2998     Lubricant     1    
C     1U-5718     Vacuum Pump     1    
169-7372 Fluid Sampling Bottle     1    
4C-4057 Tube
7.9 mm (0.31 inch) OD     1    
D     4C-5552     Large Bore Brush     1    
E     4C-6774     Vacuum Gun Kit     1    
F     8T-7765     Surface Reconditioning Pad     1    
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 1 g01114892
Illustration 2 g01135876
When you install a new injector the E-Trim value must be programmed into the engine control module. The injector confirmation code may need to be programmed into the engine control module. E-Trim Value (X) is a twelve digit alphanumeric code that is supplied with the data sheet that comes with the new injectors. Injector Confirmation Code (Y) is a four digit numeric code. Both of the codes are located on the top of electronic unit injector (2). Use the following menu to program the E-Trim value.
ECM Summary Screen
Service Menu
Injector Code Calibration
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.
Position electronic unit injector (2) in the cylinder head.
Install spacer (5), clamp (6), and bolt (4). Tighten the bolt to a torque of 55 10 N m (41 7 lb ft).
Install bridge assemblies (3) .
Connect harness assembly (1). Tighten the nuts to a torque of 2.5 0.25 N m (22 2 lb in).End By: Install the rocker arms and the rocker arm shaft. Refer to Disassembly and Assembly, "Rocker Arm and Shaft - Install".

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