TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
Page 481 of 779
c. Cleaning. (1) External surfaces of coolers may be cleaned using oil cooler cleaning tool - 2940-927- 3303. Clean thoroughly and blow dry with compressed air at 15 psi pressure. (2) To clean the interior of an oil cooler assembly core, the pump equipment shown in figure 6-224 is required. Four solutions are used for the cleaning procedure. There are several possible arrangements of the equipment depending upon equipment availability and versatility. If provision can be made for flushing pump lines, one set of pump equipment can be used with four storage tanks to provide the required four solutions for rinsing, cleaning, and flushing. If such provisions cannot be made conveniently, four sets of pump equipment are required. (3) Remove the thermostatic bypass valve (A) from the valve housing (fig. 6-223). Press a rubber plug into bypass opening in the valve housing. Reinstall valve into the valve housing so that the valve bears up against the rubber plug. Note. Use only cleaning solutions recom- mended in these instructions or ones satisfactory for aluminum. Many solutions satisfactory for cleaning copper or copper nickel coolers are highly corrosive to aluminum and if used will result in the destruction of the cooler. If equipment has been previously used with any other cleaning solutions, it should be thoroughly washed out and flushed with the recommended solution. Warning; Cleaning solvents and solvent cleaning compounds are toxic and flammable and must be used only in a well ventilated room. Take adequate safe guards for fire prevention in work area. Use protective clothing and avoid contact of these solutions with the skin. Figure 6-224. Oil cooler cleaning equipment setup-schematic diagram. 6-187