| Required Tooling | |||
| Tool | Part Number | Part Description | Qty |
| A | 276-7018 | Plug Cap Kit | 1 |
| B | 1U-5512 | Abrasive Material | 1 |
| 8T-7765 | Surface Reconditioning Pad | 1 | |
| C | 207-1601 | Rubber Lubricant | 1 |
| D | 510-4187 | Socket | 1 |
| NOTICE |
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Prior to loosening any high-pressure joints, use compressed air to remove any external debris around the accumulator bore in the cylinder head just behind the accumulator clamp. |
| NOTICE |
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Use Tooling (A) to cap fuel lines, fittings, ports. and any other openings on the fuel system to prevent contamination. Use clean latex gloves before handling cleaned components. |
Start By:
- Remove high-pressure fuel lines.
| NOTICE |
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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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
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This fuel system may contain high-pressure fuel for extended periods after engine shutdown. Do not open the high-pressure fuel system without first releasing the high-pressure fuel from the system. Refer to the Operation and Maintenance Manual, "High-Pressure Fuel System - Pressure Release" to properly release fuel pressure. Exposure to high-pressure fuel may result in personal injury. |
- Remove nuts (8) and the spherical spacers.
Note: Do not remove the studs from the cylinder head.
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Illustration 2 g06070307 - Remove accumulator (9) slowly out of the cylinder head.
Note: If prying is required to remove accumulator (9), ensure that a pry-bar or similar device only contacts the surface underneath the accumulator clamp.
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Illustration 3 g06070469 - Remove O-ring seal (10).
- Cap the tip of accumulator (9) and place in a clean new resealable bag.
- If necessary, use Tooling (B) to remove any rust scale from the outer rim of the accumulator bore.
Note: Surface does not have to be polished.
- Carefully remove any remaining debris from the outer edge of the accumulator bore using a new lint-free towel moistened with brake cleaner.
- Use Tooling (A) to plug the open accumulator bore in the cylinder head.
Cap both fuel connections on the accumulator and place the accumulator in a clean new resealable bag
Note: If replacing accumulator at either cylinder #11 or #12, ensure that a new end-plug and a new ball is available. Reuse of the end plug and ball in the accumulator is not recommended.
Note: If removing accumulator at either cylinder #11 or #12 for inspection only, do not remove the end-plug.
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| Illustration 1 | g06070122 |
- Using Tooling (D) check the torque of studs (11). The torque of studs (11) is approximately
47 ± 5 N·m (37 ± 4 lb ft) .Note: If a replacement stud is required, do not exceed a total turn angle of 45° from stud snug to final torque of
47 ± 5 N·m (37 ± 4 lb ft) .Show/hide table
Illustration 5 g06070469 - Use Tooling (C) to lubricate O-ring seal (10).
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Illustration 6 g06070307 - Install accumulator (9).
Note: Do not push the accumulator in by hand as it could lead to damage to the tip of the accumulator. Damage to the accumulator will result in a fuel leak.
Note: If installing accumulator at cylinder #11 or #12, place ball and end-plug against mating cone in accumulator inlet port and hand tighten end-plug and lubricate the O-ring seal on end-plug with clean engine oil.
- Lubricate the contact surfaces of the spherical spacers with clean engine oil and install the spherical spacers and nuts (8) by hand. Use one of the nuts to draw the accumulator into the cylinder head until the accumulator bottoms out and contacts the injector. Do not tighten. Back off the nut used to draw the accumulator in by one turn.
Note: Spherical end of the spacer must seat against the accumulator clamp cone.
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Illustration 7 g06070122 - Evenly tighten nuts (8) to a torque of
35 ± 4 N·m (26 ± 3 lb ft) rotating each nut (8) no more than 90° at a time.
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| Illustration 4 | g06070787 |
Note: Following repairs to the high-pressure fuel system, accumulator plugs on opened cylinders should be removed. A successful completion of the"Fuel Systems Function Test (FSFT)" using CATET must be performed. Upon completion of the FSFT, accumulator plugs are to be reinstalled.
End By:
- Install high-pressure fuel lines.