Installation Of 7N4288 Pulley Seal{7320} Caterpillar


Installation Of 7N4288 Pulley Seal{7320}

Usage:

7N4296 and 7N4297 Refrigerant Compressors Rebuilt 1P2780 and 2P8233 Refrigerant Compressors (with 7N4295 Kit)

NOTE: Twenty-four hours are needed for the adhesive to cure (get to its permanent degree of hardness) before assembly of the compressor.

1 - 7N4288 Seal (do not remove seal from package until ready to use).
2 - RTV silicone rubber adhesive sealant. (RTV is a one part material similar to paste, that cures at room temperature.
3 - Noncaustic (without ability to destroy by chemical action) unheated general purpose cleaning solvent.
4 - Isopropyl alcohol (91% pure) or 8M8060 Quick-Cure Primer.
5 - 5P7414 Seal Pick.
6 - Adhesive spreader (small piece of wood or metal).

1 See Form SENR7454 Air Conditioning and Heating Service Manual for disassembly and assembly of the compressor.

2 Remove the old seal (1) with the 5P7414 Seal Pick (2) or a similar tool.

3 Use screwdriver (3) as a scraper to clean the seal pocket.

4 Wash the coil and seal socket with a general purpose solvent and use air under pressure to make the part completely dry.

5 Use alcohol or 8M8060 Primer to clean any oil and dirt from the seal pocket. Before the next step is started, be sure the seal pocket and coil body are dry; do not use air pressure.

6 Put RTV adhesive (4) in the seal pocket and use spreader (5) to make it smooth and even. This operation and the next step must be complete in from three to fifteen minutes.

7 Remove seal (6) from the package. Do not let the red sponge rubber come into contact with the fingers or get dirt or oil on it.

8 Install seal (6) in the seal pocket with the red rubber against the adhesive.

9 Push seal (6) into the seal pocket all around with seal pick (2) as shown.

10 Do not assemble the compressor at this time. Let the adhesive cure for twenty-four hours before the compressor is assembled.

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