HOSE AS 3116756 - Caterpillar

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Rubber end sheet oil cooler - Normal condition. The cooler is an earlier model with tube ends almost flush with the end sheet.Use again
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Rubber end sheet oil cooler - Normal condition. The extension of the tubes beyond the end sheet indicates that the cooler is a newer model.Use againBlistering
This condition is the most common surface blemish leading to the scraping of oil coolers that could be salvaged. Blistering is characterized by a bubbling appearance often with loose flaps of rubber. The blisters form when water is absorbed into the rubber at elevated temperatures. The tube ends are closer to the rubber end sheet in early production oil coolers and are more likely to show blistering.An oil cooler showing blistering can be reused after loose rubber is removed with a wire brush or wire wheel. Removal of the loose material prevents tube blockage.
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BlisteringUse againAfter removing loose rubber with a wire brush or wire wheel.
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Another example of blisteringUse againAfter removing loose rubber with a wire brush or wire wheel.Wrinkling
Early production methods sometimes caused this minor blemish. A wrinkle will sometimes appear where the end sheet meets the housing. A wrinkled end sheet will not affect the performance or life of an oil cooler.
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WrinklingUse againChipping
Chipping, sometimes called "chunking", is a surface condition where sections of rubber material are loose or missing. Dimensional and pressures checks must be made on an oil cooler with this condition to determine if the oil cooler can be reused. The dimensional check consists of measurement of the void in the rubber end sheet. No missing section can be longer than 19.0 mm (0.75 inch) or deeper than 3.8 mm (0.15 inch). If either of these dimensions is exceeded, the oil cooler should not be reused. If the end sheet passes the dimensional checks, the oil cooler must be pressure tested. Use the procedure and equipment as described in Guideline For Reusable Parts, SEBF8077, "Engine Oil Cooler Inspection, Repair, and Cleaning". The oil cooler must pass the leak check at 795 kPa (115 psi) before the oil cooler can be returned to service.
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ChippingUse againAfter meeting reuse criteria for maximum void size and pressure test.Baffle Check Procedure
Internal baffles can break or come loose and move downstream along the tubes. The outermost baffles are mounted within 25 mm (1.0 inch) of the oil ports (inlet and outlet). The baffles are semicircular and are mounted internally in a staggered pattern to route the oil for efficient cooling. To check for baffle breakage or movement, make a wire inspection tool from stiff wire. The wire should be bent at 90 degrees to form one leg 38 mm (1.5 inch) long. Stick the wire into the oil port and move the wire along the core downstream from the port. The wire should hit the baffle. If the wire will move into the cooler until the bend in the wire prevents the wire from moving further, there has been a baffle failure. There are no void in