EDGE GP-CUTTING 1399229 - Caterpillar

(3) .
Remove four capscrews (4) from the mounting flange of housing (5). In addition to the holes for the four capscrews, the mounting flange has three holes for forcing bolts. Use three of the four capscrews (4) as forcing bolts and remove the pump from the motor.
When the pump is removed from the motor, keep the motor's shaft key (6) for reassembly. Move the pump to the service area.Note: When you remove head (7), idler gear (10) is likely to be removed also. The idler gear can slip off the idler shaft. Tilt the head slightly upward. Be careful not to drop the idler gear.
Mark housing (5) and head (7) for proper orientation upon reassembly. Remove capscrews (8) in order to remove the head from the housing.
Remove head gaskets (9) .
Remove idler gear (10) and bushing (11) from idler shaft (12) as a unit. Inspect the idler shaft.If the idler shaft is worn and the shaft requires replacement, the idler shaft can be removed by pressing. The idler gear's bushing must also be replaced.
Remove rotor (13) from housing (5). To remove the rotor, place the housing in a press with the housing's mounting flange upward. Use a plate with a diameter of 34.9 mm (1 3/8 inch) to press on the rotor's hollow drive end. The seal's spring and rotating portion (14a) will be removed with the rotor.
Remove the seal's spring and rotating portion (14a) from rotor (13) and discard the part.
Illustration 27 g00888318
Section view of the pump assembly (5) Housing (14b) Stationary portion of seal
Use a screwdriver and fit the blade between the mounting flange of housing (5) and stationary portion of seal (14b). Loosen the seal from the housing's bore and remove the seal. Discard the seal.
Thoroughly clean the reusable parts and the inside of housing (5). If necessary, remove internal machine screws (15) and pipe plugs (16) from the housing. After the parts are clean, reinstall the machine screws and the pipe plugs.Assembly
Illustration 28 g00871663
(1) Capscrews (2) Pressure relief valve (3) Gasket (4) Capscrews (5) Housing (6) Shaft key (7) Head (8) Capscrews (9) Head gasket(s) (10) Idler gear (11) Bushing (12) Idler shaft (13) Rotor (14a) Spring and rotating portion of seal (14b) Stationary portion of seal (15) Machine screws (16) Pipe plugs
Make sure that pipe plugs (15) and internal machine screws (16) are installed in housing (5) .
Place housing (5) on a firm surface with the mounting flange downward. Use light oil to lubricate the housing's inner bore for the stationary portion of seal (14b), the seal's outer diameter, and the seal's inner diameter. Place the seal into the housing's bore with the polished face of the seal upward. Avoid touching the polished face.You may tilt the seal in order to fit the seal into the bore. Make sure that the seal's O-ring does not move out of the position. Install the seal against the seat in the bore.Note: The seal's spring and the rotating portion are installed as a unit. Do not remove