Tail Rotor Driveshaft Hanger

BHT-212-CR&0NOTEIf hanger bearing (13) has beenreplaced during overhaul of hangerassembly and is new, do notlubricate bearing with a hand greasegun. The bearing has beenlubricated at the factory andadditional lubricant may damagebearing seal.8. Lubricate hanger bearing (13) with handgrease gun, using grease (C-001), Mobil 28only.1 9. The tail rotor hanger will be tagged withdate of lubrication and an entry made incomponent historical record, if hanger is to bereturned to stock.1 10. When tail rotor hanger is installed onhelicopter, an entry will be made in helicopterlog and flex couplings lubrication log.65-9A. REPLACEMENT - COUPLINGTEMPERATURE INDICATOR TEMP-PLATES.Dl.MATERIALS REQUIREDRefer to BHT-ALL-SPM for specification andsource.NUMBERNOMENCLATUREC-298 Epoxy AdhesiveC-309 Methyl -Ethyl- Ketone(MEK)C-318C-436Cleaning CompoundPaint Remover1. Remove epoxy coating and TEMP-PLATES using paint remover (C-436). Repeatprocess until no trace of epoxy is present..................CAUTION..................-pC+.N-0CONTAMINATION. ANYQ..0-0E0)°06-0CC)c2)--ICONTAMINATION COULD ALLOWTHE TEMP-PLATES TO COME OFFOR I N D I C A T E F A L S ETEMPERATURES.(Q0)LLs-.n30Q2)DAD2. Prepare outer coupling surface forbonding by scrubbing surface clean with acloth moistened with an authorized cleaner,such as MEK (C-309) to remove allcontamination. Before the cleaner solventdries, wipe the surface dry with a clean cloth.The cleaned surface should be at least 0.50m`"0X00inch (12.70 mm) larger than the TEMP-PLATES. Refer to figure 65-5 for location ofTEMP-PLATES on outer coupling.3. Accomplish a water break-free test onthe prepared bonding surface by applyingdistilled or demineralized water from asuitable, dispenser (such as a squeeze bottle).The water must flow into a continuous filmwithout gathering into distinct water dropletswithin 25 seconds after application on thesurface. Wipe dry with a clean cloth. Ensurethe bonding surfaces are not subsequentlycontaminated.4. If the coupling bonding surface will notmeet the water break-free test requirementsand the cleaning materials are notcontaminated, clean coupling bondingsurfaces as follows.NOTEFollow the manufacturersrecommendations for proper watermixtures.a. Using an authorized alkaline cleaningcompound (C-318) and cloth, scrub thecoupling bonding surface clear. Followcleaning with a thorough water rinse.b. Thoroughly dry coupling surfaces.C. Repeat water break-free test as statedabove.BONDING SURFACE AND TEMP-PLATES MUST BE FREE OF ALL65-00-00Rev.4 Page 1 0A