CONTROL GP-HANDLE 3285933 - Caterpillar

Do not slide the servo piston assembly through the pump housing farther than necessary to install the second piston ring on the servo piston. Sharp edges on the servo bore, inside the pump housing, can damage the first piston ring. Do not damage bearing ring (54) when sliding the servo piston back into the pump housing.
4. Slide the servo piston assembly through the pump housing until the piston ring groove (without a piston ring) is just exposed. Install piston ring (55) in the groove of the servo piston. Put clean oil on the piston ring and slide the servo piston back into the pump housing. 5. Install O-ring seal (53) on plug (50). Install valve (51), spring (52) and plug (50) in the pump housing. Tighten the plug to a torque of 136 to 231 N m (100 to 170 lb ft).6. Position a new gasket and cover (67) on the pump housing, and install the five bolts. Tighten the five bolts to a torque of 14 to 18 N m (10 to 13 lb ft).7. Position a new gasket on the pump housing. Screw cover (64) onto the centering screw, and install five bolts (48). Tighten the bolts to a torque of 14 to 18 N m (10 to 13 lb ft).8. Position the servo piston in the approximate center of its travel by turning the centering screw. Hold the centering screw from turning and install lock nut (56). Tighten the lock nut to a torque of 17.6 to 24.4 N m (13 to 18 lb ft).
When installing bearing (47), the printed or numbered end of the bearing cage must face the press.
9. Press bearing (47) into the housing with a suitable press. When installed correctly, the bearing will protrude from the inside surface of the housing 2 to 2.5 mm (0.08 to 0.10 in) to serve as a pilot for the valve plate. 10. Install valve plate (46) with Tool (C). Make sure the valve plate sits down on the valve plate pin. 11. Install washer (42), spring (43) and washer (44) in cylinder block (39). Put the cylinder block in a press. Install a suitable piece of square steel stock on washer (44), and compress spring (43) until retaining ring (45) can be installed. 12. Install pin retainer (40) in the cylinder block. During the assembly of the vibratory pump, three pins (41) must be installed in the large grooves in the cylinder block and retainer (40) must be even (flush) with the end of the cylinder block.13. Install three pins (41) into the large grooves in the cylinder block.14. Install slipper guide retainer (38) on top of three pins (41). Ensure that the slipper guide retainer is seated properly on the three pins.15. Put clean oil on seven piston assemblies (36). Install piston assemblies (36) in slipper guide (37). Install the slipper guide and piston assemblies in cylinder block (39). Move the slipper guide from side to side to ensure the piston assemblies move