4-25. GENERAL ASSEMBLY INSTRUCTIONS.

TM 9-2320-304-14&P 4-147 Organizational Maintenance Instructions (Cont) 4-25. GENERAL ASSEMBLY INSTRUCTIONS. a. Preparation. Remove protective grease coatings from new parts before installation. b. Preformed Packing Installation. Lubricate all preformed packings with a thin coat of lubricating oil (Item 10, Appendix F) before installing. To install a preformed packing, first clean the groove, then stretch packing, and place into position. Place component on flat surface and uniformly press packing into position. Ensure preformed packings are not nicked or torn during assembly. CAUTION Use sealing compound sparingly and only on male threads. Do not apply compound on first two threads to avoid contamination of system from compound. Do not apply compound to hose connections or fittings with preformed packings. Damage to equipment may result. c. Pipe Joints and Fittings. Use sealing compound, sealant, or adhesive as indicated in each maintenance task. Refer to Para 4-26 for general tightening procedure. d. Oil Seals. Coat oil seals evenly with oil or grease before installing. Install oil seals with seal lip facing toward lubricant, applying an even force to outer edge of seal. If oil seals are to be installed over keyed or splined shafts, use a guide to prevent sharp edge of keyway or splines from cutting the leather or neoprene seal. Construct guides of very thin gage sheet metal and shape to the required diameter. Make certain guide edges are not sharp and are bent slightly inward so they do not cut the seal. WARNING On direct contact, uncured silicone sealant irritates eyes. In case of contact, flush eyes with water and seek medical attention. In case of skin contact, wipe off and flush with water. e. Silicone Sealant. Silicone sealant is often used instead of a gasket to seal mating parts. The mating parts must be clean, dry, and free of oil or grease for proper adhesion. After silicone sealant has been applied, the mating parts must be assembled immediately. Silicone sealant starts to set up in 15 minutes and takes 24 hours to completely cure. Excess silicone sealant should be wiped off after assembling the mating parts. f. Gaskets. Remove all traces of previous gasket and sealant before installing new gasket. Coat both sides of gasket with sealant to provide added sealing. 4-26. GENERAL INSTALLATION INSTRUCTIONS. a. Preparation. When unpacking items, remove all packing material, barrier paper, tape, plastic bags, protective caps, and protective grease coatings. Handle and store removed components carefully. CAUTION Use sealing compound sparingly and only on male threads. Do not apply compound on first two threads to avoid contamination of system from compound. Do not apply compound to hose connections or fittings with preformed packings. Damage to equipment may result. b. Sealing Compounds. Use sealing compounds as required in each maintenance task.