PUMP GP-PISTON 1058881 - Caterpillar

start by:a) remove fuel injection pumpsb) separation of governor from fuel injection pump housingc) remove fuel transfer pump 1. Loosen screws (1) in the levers and remove screw (3) in the crossover lever. Slide shaft assembly (2) out of the housing. 2. Loosen screws in levers (4) and remove the screw in crossover lever (5). Slide shaft (6) out of the housing. Put identification on lifters (7) and rollers (8) for installation in their respective bores in the housing.3. Use a magnet to remove eight lifter assemblies (7). 4. Remove roller (8) from each lifter assembly. 5. Turn the camshaft so the groove (slot) for the timing pin is in the position shown and carefully remove camshaft (9). Remove the thrust washer from the housing. 6. Remove camshaft rear bearing (10) from the fuel pump housing. Be careful not to damage the bearing bore in the housing.7. Use tool group (A) to remove the camshaft front bearing from the fuel pump housing. Earlier fuel pump housings do not have a thrust washer for the camshaft. The 6V4068 Tool Group can be used to machine the housing so the 9N5822 Thrust Washer can be used. See SPECIAL INSTRUCTION Form No. SMHS7897 for the procedure to machine the housing.Assemble Fuel Injection Pump Housing
Put clean fuel on all parts during assembly. 1. Use tooling (A) to install the camshaft front bearing in the housing. Install the bearing with the chamfer toward the inside of the pump housing. 2. Install the bearing so it is even with the front face of the pump housing. 3. Use tooling (B) to machine the bore in the camshaft front bearing to the correct size. See SPECIAL INSTRUCTION Form No. SMSH6735 for the procedure to machine the new camshaft front bearing. The bore in the bearing must be 1.0005 .0005 in. (25.413 0.013 mm). 4. Use tooling (A) to install the camshaft rear bearing in the housing. Install the bearing so groove (1) in the bearing is in the position shown. On earlier pump housings without a thrust washer install the bearing into the bore so the outer face of the bearing is .0045 .0010 in. (0.114 0.025 mm) below face (X) on the housing. On later pump housings with a thrust washer install the bearing into the bore so the outer face of the bearing is .017 .005 in. (0.43 0.13 mm) below the counterbore for the thrust washer. 5. Install thrust washer (2) in the housing with the ear on the thrust washer in the hole in the pump housing so the thrust washer will not turn.6. With the pump housing in a vertical position as shown, carefully install camshaft (3). To make sure that the thrust washer will be kept in its correct installation location, keep the pump housing in a vertical position and install the fuel transfer pump and camshaft sleeve. See FUEL TRANSFER PUMP INSTALLATION for the procedure to install the fuel transfer pump and