Illustration 8. Bushing
N. Do not reuse bushings with heavy amounts of spline rust. The splines must be in good condition to maintain the tightening torque. Number the bushings as they are removed so they can reinstalled in the same bores.
Sealing Face Chemical Cleaning Process 1. Obtain a container of 1U-9698 Descaleant 2. Provide a clean work area. NOTE: Do NOT mix plungers and barrels. The original plungers must remain with the same barrels. 3. Use a clean soft cloth to wipe the sealing faces of the barrel and bonnet as clean as possible. 4. Plug the barrel and bonnet bores with a non-damaging material. A 7000 Series nozzle tip cap will fit in the bores. See Illustration 6. 5. Use the 1U-9698 Descaleant and a cotton swab to scrub the stained sealing surfaces of the bonnet and barrel. 6. Let the descaleant remain on the sealing surfaces for between two minutes (minimum) and five minutes (maximum). 7. Use a cotton swab to repeat the scrubbing action. Then flush the sealing surfaces with clean diesel fuel. 8. Assemble the fuel injection pump groups using the original plungers. 9. Visually inspect the timing spacers (Illustration 7) and bushings (Illustration 8).
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