SECTION III: PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS]TM 9-2350-256-20cause distortion. Tightening includes the correct installation of lockwashers, nuts lockwire, or cotter pins to secure thetightened nut or bolt in place.Special Conditions. When conditions make it difficult to perform the complete preventive maintenance procedure on thevehicle at one time, the procedure can be handled in sections. Plan to complete all operations within the week, ifpossible. All available time must be utilized, if necessary, to assure that maintenance operations are completed.2-11 SPECIAL INTERVALSOperation under adverse conditions, such as extreme temperatures, dust, or mud may require more frequent services.Commanders are authorized to reduce the intervals between preventive maintenance services whenever conditionswarrant.When mileage is accumulated rapidly, the appropriate preventive maintenance services will be performed at thecommander's discretion.After operation in water, mud, or loose sand, the vehicle should be cleaned of any foreign matter as soon as possible andlubricated.2-12 GENERAL PROCEDURESAutomatically Applied. The general listed procedures in TM 9-2350-256-10 will be followed. Unit Maintenancemechanics must be so thoroughly trained in these procedures that they apply them automatically at all times in theperformance of their duties.Driver/Crew Participation. The driver or crew usually accompanies the vehicle and assists the Unit Maintenancemechanics in performance of these services.2-13 PROCEDURES FOR SPECIAL INTERVAL PREVENTIVE MAINTENANCE CHECKS AND SERVICESDA Form 2404 (Equipment Inspection and Maintenance Worksheet) is utilized by the Unit Maintenance mechanic torecord periodic inspections and maintenance services performed, faults corrected and faults beyond the organizationalcategory to correct. The item numbers recorded on DA Form 2404 must correspond to the item numbers on the UnitPreventive Maintenance Checks and Services Table 2-1.Table 2-1 reflects the work required to accomplish inspections, tests, services, and minor repairs such as replacement ofcotter pins, screws, nuts, washers, and locking wire. Work to remove or disassemble components or assembliesnecessary to accomplish preventive maintenance checks and services is also included. The repair or replacement ofdefective components, assemblies, or repair parts is not included in this table. See the Maintenance Allocation Chart,Appendix B.During accomplishment of preventive maintenance checks and services, certain components and assemblies must beremoved or disassembled. Pertinent items of Table 2-1 refer to paragraphs in the manual containing instructions forremoval or disassembly. Removal and disassembly is limited to that authorized by the Maintenance Allocation Chart,Appendix B.The driver is often unaware of defects that have developed gradually in the vehicle. Unit Maintenance personnel shallroad test the vehicle as part of the preventive maintenance checks and services. During and after road test, any repairsor adjustments necessary to assure safe operation should be made. Any defect that does not require2-7
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