KEY 1B8743 - Caterpillar

Removal Procedure
Table 1
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
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.
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.
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.
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.
Illustration 1 g06070122
Remove nuts (8) and the spherical spacers.Note: Do not remove the studs from the cylinder head.
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.
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 bagNote: 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.Installation Procedure
Illustration 4 g06070787
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).
Illustration 5 g06070469
Use Tooling (C) to lubricate O-ring seal (10).
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.