TM 9-2350-247-34PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDINGLUBRICATION INSTRUCTIONS — Continued0005 00WARNINGAir pressure in excess of 30 psi (207 kPa) can injure personnel. Do not direct pressurized air atyourself or others. Always wear goggles.CAUTIONLye or caustic substances will damage metal surfaces. Do not use lye or caustic mixtures toclean metal surfaces.e.STEAM CLEANING. If steam cleaning is used, dry clean parts at once with compressed air. Apply a thin film ofclean oil to surfaces that are not painted to prevent rusting. Never use lye of caustic mixtures that will corrode oretch metal surfaces.f.LUBRICATION OF NEW BEARINGS. See TM 9-214 for cleaning and lubrication procedures. Bearings thathave been in service should also be lubricated.WARNINGAir pressure in excess of 30 psi (207 kPa) can injure personnel. Do not direct pressurized air atyourself or others. Always wear goggles.g.CASTINGS.1) Clean inner and outer surfaces of casting with cleaning compound (WP 0080 00, Item 49). Dry casting withcompressed air.2) Remove sludge and gum deposits with a brush.3) Blow out all tapped holes and armor mounting inserts with compressed air.h.BALL AND NEEDLE BEARINGS. Bearings require special cleaning techniques. See TM 9-214 for cleaningand maintenance procedures for ball bearings.i.OIL PASSAGES.1) Make sure all oil passages are not clogged.2) Clean oil passages and break up any sludge or gum deposits.0005 00-5
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