SHAFT 7M8663 - Caterpillar

Inspection Procedure
Table 9
Pressure Plate Measurements
Pump and Motor Group Number Minimum Pressure Plate Thickness
9 6.70 mm (0.264 inch)
10 7.92 mm (0.312 inch)
11 6.70 mm (0.264 inch)
Illustration 60 g03396331
Carbon deposits on the bronze face
USE AGAINUse again after the carbon is removed by ultrasonic cleaning and if the plate is not bent. See Illustration 61. Refer to Table 9 for Specifications.Small surface marks on the bronze face can be removed by a procedure known as "touch lapping". To touch lap, cover surface plate 7B-0337 Surface Plate with 180 grit crocus cloth. Wet the cloth thoroughly with clean solvent (made from petroleum). Take the part to be touch lapped and put the part on the wet cloth with the surface to be touch lapped toward the cloth. Move the part in the shape of the number "8". When the procedure is finished, wash the part in clean solvent and allow to dry at room temperature.
Illustration 61 g01421104
Measure pressure plate flatness
Note: To see if the plates are flat, hold the plates with bronze surfaces turned toward each other. If a 0.18 mm (0.007 inch) feeler gauge fits between the plates, the plates are too bent and no longer acceptable.
Illustration 62 g03396335
Scratches in the pressure plate
USE AGAIN
Illustration 63 g01421106
Step in the pressure plate
USE AGAINUse again if the step can be removed by touch lapping. Refer to Table 9 for Specifications.
Illustration 64 g01516920
The erosion is near the pressure equalization chamfer.
USE AGAIN
Illustration 65 g01421108
Smearing on the bronze face
DO NOT USE AGAIN
Illustration 66 g01421110
Pitting on the pressure plate.
USE AGAINUse again if the plate has an acceptable thickness. Refer to Table 9.Miscellaneous Parts
Cleaning Procedure
Clean miscellaneous parts, such as bushing supports, couplings, isolation plates, and support rings with clean solvent made from petroleum.Note: Never use seals again. Always use new seals.Inspection Procedure
Illustration 67 g01422223
Damaged coupling
USE AGAINUse again if more than 75 percent of the length of each spline is still in acceptable condition.
Illustration 68 g01421113
Tip of isolation plate is broken off.
DO NOT USE AGAIN
Illustration 69 g01421114
Isolation plate damaged during assembly.
DO NOT USE AGAINTest Procedure
For the correct break-in procedure, refer to Bench Test Procedure, REHS1832, "Bench Test Procedure for Gear Pumps"for gear pumps.