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TM 9-2320-304-14&P
5-78
Direct Support and General Support Maintenance (Cont)
5-14. 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 light
mineral oil 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 5-15 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 set. 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.
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