- Engine:
- C-10 (S/N: 2PN1-UP; 3CS1-UP; 8YS1-UP)
- C-12 (S/N: MBL1-UP; 1YN1-UP; 2KS1-UP; 9NS1-UP)
| NOTICE |
|---|
Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. |
A change in the installation procedure of the Electronic Unit Injector has occurred in order to improve product reliability.
Installation Procedure
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| B | 9U-6862 | Tapered Brush | 1 |
| 9U-7237 | Brush Extension | 1 | |
| C | 9U-6863 | Small Bore Brush | 1 |
| 9U-7237 | Brush Extension | 1 | |
| D | 8T-2998 | Lubricant | 1 |
| NOTICE |
|---|
Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. |
| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Use Tooling (B) to clean injector seating (7) .
 | |
| Illustration 1 | g01019375 |
- Use Tooling (C) to clean tip bore (8) .
- Lubricate the bore lightly with a 50/50 mix of clean engine oil and Tooling (D) .
 | |
| Illustration 2 | g01019370 |
Note: Do not reuse seals (9) and bolt (4). Use new seals and a new bolt (4) for installation.
 | |
| Illustration 3 | g01019336 |
Typical Example | |
- Install the electronic unit injector (3) in the head assembly. Install the electronic unit injector in the same location on the head assembly. Place the hold-down clamp (6) at the base of the unit injector. Push down on the return spring of the unit injector in order to seat the unit injector.
Note: The injector code (10) will be used later if the injectors have been changed. Write down the injector code (10) which is located on the solenoid.
 | |
| Illustration 4 | g01019373 |
| NOTICE |
|---|
When a fuel injector group is serviced, the new fuel injector group's 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 fuel injector group's electronic code is not entered, the previous fuel injector group's characteristics are assumed. If it is not possible to immediately reprogram the electronic injector code of the injector 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 spacer assembly (5) and bolt (4) that holds the unit injector in place.
- Pull the unit injector completely into the bore. Tighten the bolt to a torque of 30 ± 7 N·m (22 ± 5 lb ft).
Note: In ALL instances, replace the electronic fuel injector hold-down bolt with a NEW bolt.
- Install cap assembly on unit injector (3). Tighten nuts to a torque of 2.5 ± 0.25 N·m (22 ± 2 lb in).
- Install bridge assemblies (2) onto the valve stems in the head assembly. Install the bridge assemblies in the same location on the head assembly.
- Install pressure plug (1) in the fuel manifold.
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| Illustration 5 | g01019031 |
Install the rocker shaft and the pushrods. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod - Install".