Quantcast ASSEMBLY - TM-9-2815-247-34_78

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TM 9--2815--247--34 0012 00--10 GENERAL MAINTENANCE INSTRUCTIONS -- CONTINUED 0012 00 ASSEMBLY General Extreme care must be exercised in all assembly operations to insure satisfactory engine performance. General rules for assembly are outlined below. Procedures for assembling the various components are covered in the para- graph relating to the specific component. Precautionary Rules Cleanliness is essential in all assembly operations. Dirt and dust, even in minute quantities, are abrasive. Parts must be cleaned as specified and kept clean. Wrap or cover parts and components when assembly procedures are not immediately completed. Coat all bearings, shafts, and all contact surfaces with lubricant (item 14, WP 0100 00) to ensure lubrication of parts during initial engine starting. Always use new gaskets and preformed packings when assembling engine. Use flat washers under all lock washers, nuts and bolts to protect aluminum surfaces. Most bolts, cap screws, and nuts must be secured with lockwashers, tab washers, locking wire, or cotter pins, de- pending on method of locking specified. Whenever a locking method is not specified for bolts and cap screws, the mid--grip helical--coil threaded inserts into which the bolts or screws are threaded serves as the locking device. It is also important that all hardware be tightened to the specified torque. Refer to torque specifications in this work package. TORQUE SPECIFICATIONS Standard Torques for Nuts and Bolts Apply a light film of lubricant (item 12, WP 0100 00) to bolts, cap screw threads, contact face of nuts, bolt heads, and cap screws. Avoid excessive amounts of lubricant in blind tapped holes. Refer to WP 0105 00. Special Torques for Studs and Bolts Apply a light film of lubricant (item 12, WP 0100 00) to studs, bolts, cap screw threads, contact face of nuts, bolt heads, and cap screws (except as noted). Avoid excessive amounts of lubricant in blind tapped holes. Special torques are listed in each task where applicable. NOTE On assemblies subjected to wire or cotter pin hole align- ment, set torque wrench to low limit and torque nut. To facilitate alignment it is permissible to tighten nut to first hole beyond torque setting. Standard Pipe Plug Torques. Apply pipe thread compound to all pipe thread connections prior to installation. Refer to WP 0101 00 for torque specifications. END OF TASK


 


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