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PLATE-MOUNTING 5088438 - Caterpillar

5088438 PLATE-MOUNTING Caterpillar parts PLATE
Alternative (cross code) number:
Caterpillar 5088438 PLATE-MOUNTING

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Illustration 67 g01510638
(21) Bronze face.
(22) Bearing bore diameter.
Illustration 68 g01510676
(23) Bearing bore diameter.
(24) Backup ring groove.Cleaning Procedure
Wash pressure plates with clean petroleum-based solvent. Be sure not to damage the bronze face during the procedure. Removing oil discoloration is not necessary. Remove carbon deposits with the 6V-6050 Ultrasonic Cleaner Group.Inspection Procedure
Illustration 69 g01516915
Carbon Deposits on the bronze face.
USE AGAINUse the plate again after the carbon is removed by ultrasonic cleaning.
Illustration 70 g01422201
Step in the pressure plate.
The pressure plate can be used again if the step can be removed by touch lapping.Small surface marks on the bronze face can be removed by a procedure known as "touch lapping". To touch lap, cover the 7B-0337 Plate with 180 grit crocus cloth. Wet the cloth thoroughly with clean petroleum-based solvent. Place the part being touch lapped on the wet cloth with the surface being touch lapped face down on the cloth. Move the part in the shape of the number "8". Wash the part in clean solvent after touch lapping. Allow the part to dry at room temperature.Check thickness of the pressure plate. The thickness of the pressure plate should not change unless the gears have worn into the pressure plates. Refer to the following table for the thickness of the pressure plates.
Table 9
Pressure Plate Measurements
Pump and Motor Group Number Minimum Pressure Plate Thickness
4 7.89 mm (0.310 inch)
5 7.92 mm (0.312 inch)
6 10.87 mm (0.428 inch)
Illustration 71 g01422198
Measure pressure plate flatness.
Be sure that the plate is not bent. Check for pressure plate flatness by holding the two plates together with the bronze side facing each other. If a 0.18 mm (0.007 inch) feeler gauge fits between the two plates, then the plates are no longer acceptable.
Illustration 72 g03435239
Scratches in the pressure plate.
Illustration 73 g01516920
The erosion is near the pressure equalization chamfer.
Illustration 74 g01421108
Smearing on the bronze face
Illustration 75 g01421110
Pitting on the pressure plate
USE AGAINThe pressure plate can be used again if the step can be removed by touch lapping.Miscellaneous Parts
Cleaning Procedure
Clean miscellaneous parts, such as bushing supports, couplings, and support rings with clean petroleum-based solvent.Note: Never reuse old seals. Always use new seals.Inspection Procedure
Illustration 76 g03435276
Damaged coupling
USE AGAINReuse if 75 percent of each spline is still in acceptable condition.Testing Procedure
For the correct break-in procedure refer to Bench Test Procedure, REHS1832, "Bench Test Procedure for Gear Pumps".

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