TM 5-3895-373-34C.INSTALL - Continued.2.INSTALL O-RING BOSS (ORB) FITTINGS.Be careful not to damage preformedpacking when sliding over threads.Sharp edges of thread can cut ordamage preformed packing.Damaged preformed packing willcause leakage and affectperformance.a.Straight and swivel type ORB fittings (9 and 10)are used on the paving machine. Eachrequires a preformed packing (11) to achieve aseal. Whenever the seal is broken, thepreformed packing must be replaced.b.Lubricate preformed packing (11) withpetrolatum. Carefully install packing in matingpacking groove of ORB fittings (9 or 10).c.When installing straight type ORB fitting (9),screw fitting into mating component (12) untilpreformed packing (11) is fully seated inmating packing seat. Tighten fitting until snug.d.When installing swivel type ORB swivel fitting(10), screw fitting into mating component (13)until preformed packing (11) just meetspacking seat of mating component. Becareful not to dislodge preformed packingfrom packing groove in fitting.e.Rotate swivel type ORB fitting (10)counterclockwise to desired alignment angle.Tighten lock nut (14) until backup washer (15)seats on machined surface of matingcomponent (13). Tighten lock nut until snug.f.Connect tube or hose per step c. Check ORBfitting for leakage during system startup. Ifleaking, loosen connecting tube or hose andtighten ORB fitting. Retighten tube or hose.GO TO NEXT PAGE2-727
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