CONTROL GP-FUEL RATIO 6N4654 - Caterpillar

Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
B 9U-6862 Tapered Brush 1
C 4C-5027 Tap Wrench 1
D 4C-6774 Vacuum Gun Kit 1
E 1P-0808 Multipurpose Grease 1
F 1U-5512
or
8T-7765 Abrasive Material
or
Surface Reconditioning Pad 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Remove all carbon deposits from the angled surface at the bottom of the cylinder head bore for the fuel injection pump. Failure to clean this area may prevent the fuel injection pump from seating properly. This could result in failure of the fuel injection pump due to leakage of exhaust gas into the fuel passage.
It is important to clean the cylinder head bore for the electronic unit injector before you install the electronic unit injector. Use the following procedure to clean the bore.Note: A fine grade of Scotch Brite material is recommended for cleaning the cylinder head bore for the electronic unit injector. The product is available as Tooling (F).
Place a 38 mm (1.5 inch) square piece of Scotch Brite material on the end of Tooling (B).Note: It should not be necessary to use a power tool to clean the cylinder head bore for the electronic unit injector.
Illustration 1 g01051051
Hold the brush with Tooling (C). Insert the brush into bore (5). Rotate the Scotch Brite material against the lower surface of bore (6). Continue cleaning until the surface is smooth and shiny.Note: Tooling (D) is recommended for cleaning loose particles from the bore. The vacuum is operated with pressurized air.
Remove all loose particles from the bore.
Remove any fuel / fluid that may have accumulated before installing the injector.
Illustration 2 g01051052
Inspect O-ring seals (7) and (8) for good condition. Obtain new O-ring seals, if necessary. Coat the O-ring seals and coat the cylinder head bore for the electronic unit injector with Tooling (E).
Press the electronic unit injector into the bore of the cylinder head. Do not strike the electronic unit injector. Center the solenoid between the valve springs.Note: Adjust the height of the electronic unit injector according to the Service Manual, "Specifications".
Illustration 3 g01052571
To seat electronic unit injector (4) into the bore, install the clamp with bolt (2) and the washer. Tighten the bolt to a torque of 65 7 N m (48 5 lb ft).
Connect harness assembly (3) to the connector. Tighten the terminal nuts to a torque of 1.70 0.25 N m (15 2 lb in).
Press the harness assembly into the groove in the valve cover base.
Install bolt (1) and the clamp.End By:
Install the rocker shaft assembly and the pushrods. Refer to Disassembly and Assembly, "Rocker Shaft and Push Rods - Install".