C 3500 Truck 2WD V8-454 7.4L (1990)
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Do not dislodge the seal (O-ring) (15).
4. Shaft seal seat retaining ring (12) with J 5403.
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Place the flat side against the seal seat.
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Use the sleeve of J 23128-A to press the ring into its groove.
5. J 9625-A to the rear head of the compressor:
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Gage charging lines or pressurize the suction side (low pressure side) of the compressor with refrigerant to equalize the pressure to the drum
pressure.
6. New absorbent sleeve (11).
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Roll the material into a cylinder, overlapping the ends.
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Slip the sleeve into the compressor front head with the overlap toward the top of the compressor.
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With a screwdriver spread the sleeve ends of the sleeve butt at the top vertical centerline.
7. Sleeve retainer (10) with J 9393-A.
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Place the flange face against the front end of the sleeve.
Shaft/Seal Position And Correct Position Gaging Guide
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Press and tap with a mallet to set the retainer and sleeve into place. Place the retainer 0.7937 mm (0.03125-inch) from the face of the
compressor neck.
8. Clutch plate and hub assembly (2).
Important
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Using improper procedures, pounding or collisions can damage the shaft seal and the axial plate. If the axial plate is out of position, the carbon
face of the shaft seal may not contact the seal seat.
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To check the position of the axial plate on the shaft, remove the clutch driven plate and measure the distance between the front head extension
and the flat shoulder on the shaft with a wire gage. The clearance should be 0.66-1.9 mm (0.026-0.075-inch).
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If the shaft has been pushed back in the axial plate (measurement greater than 1.9 mm (0.075-inch), disassemble the compressor and replace
the shaft and axial plate assembly, thrust races and thrust bearings.
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If there is too much or not enough air gap between the drive and driven plates, check for shaft dislocation. It will not be possible to service the
compressor if the carbon seat is not seating against the seal seat.
9. Shaft nut (1) with J 9399-A.
