CLEANING PROCEDURES

TM 9--2520--215--34 0018 00--2 GENERAL MAINTENANCE INSTRUCTIONS – CONTINUED 0018 00 CLEANING PROCEDURES Cleanliness is of major importance in servicing the transmission. All components must be cleaned thoroughly, and kept clean throughout the repair process. The presence of dirt can cause malfunction and possible failure of the transmission. WARNING Extreme care must be taken to observe all warnings in the front of this manual. Hazardous chemicals, tools and processes will be used throughout this manual. Failure to observe warnings can cause serious injury or death. Every component must be cleaned thoroughly after the transmission is disassembled. Cleaning is necessary to ensure effective inspection for wear, damage and serviceability of components. Abrasives, files, scrapers, wire brushes and sharp tools should never be used on surfaces where finish is im- portant to the operation or sealing of parts, except where specifically recommended. Gum or varnish deposits may be removed by soaking in dry--cleaning solvent and using a soft bristle brush. Crocus cloth may be used to remove minor surface irregularities. Lapping compound may be used, if re- quired, in valve body bores to prevent valves from sticking. Clean thoroughly to remove compound after use. A soft wire brush (brass or copper) may be used to clean oil passages. Always flush such passages thor- oughly after cleaning. If steam cleaning is used, dry the cleaned parts immediately with compressed air and apply a film of oil to pre- vent rusting. Never use lye or caustic substances which will corrode or etch metal surfaces. Do not clean the lubricant from new bearings. Keep new bearings wrapped until they are to be installed. Soak bearings, which have been in service in dry--cleaning solvent to loosen deposits of dirt. Do not spin the bearing during cleaning or drying. After cleaning, turn the bearing by hand and note any evidence of grit. Clean them again if grit is present. Refer to TM 9--214 for further information on cleaning bearings.