BUSHING 4F6440 - Caterpillar

3. Use a knife to remove the metal (3) that was moved against the top pressure plate. Use the point of the knife to remove the metal (3) from around the outside diameter of bottom pressure plate (4). Do not put scratches in the pressure plate. Use air under pressure to remove any loose chips so the removal of pressure plate (4) will be easier. Do not remove the groove caused by the first run operation (break-in). Grind the short end of an allen wrench to a flat taper. Install the allen wrench in the shaft bore and lift pressure plate (4). Move the allen wrench from one bore to the other until the pressure plate is loosened. With fingers in the bores of the pressure plate lift the pressure plate straight out. Use extra caution during the removal of the pressure plate. Do not use force.4. Remove the isolation plate (aluminum), backup ring, sealing strip and retainer (white plastic) from the pump body. 5. Remove pump gears (5). 6. Remove pressure plate (6). 7. Remove isolation plate (7), backup ring and sealing strip (9) and retainer (8). 8. Remove center housing (10). Remove the O-ring seals from the center housing.9. If studs (11) are loose in the flange remove them. If the studs are tight in the flange, remove the O-ring seals from the studs.10. Remove coupling (12). 11. Turn the pump over and remove flange (13). 12. Remove seals (14) and the spacer from the flange. 13. Remove isolation plate (15), backup ring (16), sealing strip (17) and retainer (18). 14. Remove pressure plate (19). 15. Remove pump gears (20).
TYPICAL EXAMPLE16. Use the procedure given in Step 3 to remove pressure plate (22) from pump body (21). Also remove the isolation plate, backup ring, sealing strip and retainer from the pump body. For information on hydraulic pump failures see DIAGNOSTIC TYRONE GEAR PUMP FAILURES, Form No. FEG45137. For information on parts reusability see GUIDELINE FOR REUSABLE PARTS, WEAR SLEEVES FOR SHAFTS, Form No. SEBF8020 and SPECIAL INSTRUCTION, INSTALLATION OF WEAR SLEEVES FOR REPAIR OF GROOVE WEAR CAUSED BY LIP TYPE SEALS, Form No. SMHS6915.Assemble Hydraulic Pump
Make sure all the parts of the pump are clean and free of dirt and foreign material. Also put clean oil on all pump parts before assembly. The rotation of the pump is counterclockwise as seen from the drive end of the pump.1. Inspect all of the parts of the housing of the pump. Check the bores in the housing for wear. Measure the depth of the groove in each bore. If the groove is deeper than 0.38 mm (.015 in.), a replacement of the housing and gears must be made.
Two isolation plates are needed for each housing. The isolation plate that is installed in the bottom of the pump housing must have a radius along its outer edge which must be toward the bottom when installed. The isolation plate with the straight (square) edges along the radius go on top,