TM 5-3895-373-20 15.1. GENERAL MAINTENANCE PROCEDURES. All unit level maintenance shall be performed in accordance with good and safe shop practices.  Observe the following general instructions and requirements when performing paving machine components maintenance. a. Areas of the paving machine exposed to paving material buildup require cleaning prior to disassembly.  Use hammers, chisels, and scrapers to remove thickest sections of buildup.  If available, use heater gun to soften deposits adhering to components; remove softened buildup with putty knife.   When heating paving material, keep second person with fire extinguisher at hand and avoid overheating.  If heater gun is not available, use solvent or fuel washdown system to soften paving material. b. Thoroughly clean hydraulic hoses and fittings before disconnecting.  Always plug or cap off disconnected fittings to prevent dirt and contaminants from entering the system.  Failure to clean hoses and fittings and to plug or cap open fittings may result in hydraulic system contamination and equipment damage. c. Always tag mating connectors and fittings before disconnecting.  Tagging of mating connectors and fittings will ease reassembly and reduce assembly errors. d. Use a backup wrench when loosening or tightening inline fittings.  Using a backup wrench will prevent unnecessary damage to attached lines and/or smaller fittings. e. When removing tie wraps from hoses and wiring, note or mark locations and anchor points.  The proper location and installation of tie wraps will prevent undue chafing of hoses and wiring. f. Thread locking compound is used with most threaded fasteners.  If a threaded fastener will not break loose, heat threaded area of fastener from 500° to 6000F (2320 to 315°C) with heater gun.  If the special solvent used to remove thread locking compound from screw threads fails to remove buildup, discard fastener. g. Discard all removed gaskets, seals, preformed packings, self-locking nuts, lockwashers, spring pins, and deformed hardware. h. Inspect all removed components for obvious wear or damage.  Replace all worn, bent, broken, or otherwise damaged parts. i. Inspect all removed fasteners for thread damage.  If thread damage is found, replace fastener.  Replace flat washers if galled or bent.  Use screw extractor set (Item 15, Appendix E) to remove broken studs or screws. j. Clean painted surfaces thoroughly before repainting.  Do not paint over rust or corrosion.  Do not paint bearings or other parts that require surface lubrication. Reference TM 430139 for equipment painting requirements. k. Torque values cited in the text apply to modified SAE Grade 8 fasteners at required clamping loads. l. Use only authorized replacement parts. Refer to TM 5389537324P, Repair Parts and Special Tools List (RPSTL) for authorized replacement parts. m. Observe all warnings and cautions.  Wear protective clothing and equipment as specified.  Observe the Safety and Hazard Warnings provided in TACOM technical bulletin TB 43-0216. 15-2