ARMYTM 5-6115-612-34NAVYAG-320B-MME-008-4. OVERHAUL OF TURBINE ASSEMBLY.(cont)a. Disassembly(cont).(6)Place turbine assembly in fabricated tool(FT-21616, Figure 8-8). This will secure the turbinewheel (20, Figure 8-6) to prevent rotation.(7)On front of compressor inlet housing (3),remove nut (10) and washers (11 and 12) that securebolts in the 1, 4, 7, 10, 13, and 16 positions (see Figure8-7) Remove bolts (13, Figure 8-6) from diffuser (2).WARNINGTo prevent injury, ensure that insulatedgloves are worn when handling dry Iceand cold parts.(8)If necessary, place dry ice in diffuser. Waitapproximately ten minutes or until diffuser is well frosted.Use soft flame to heat outside of compressor inlethousing Carefully pull diffuser out of housing.CAUTIONCare should be taken not to damageshaft. Once drill penetrates nut, STOPDRILLING!(9)Using a 0.125 inch ( 32 cm) drill bit, drillout staked portion of nut.NOTESpeed pickup nut is staked in place.Once removed, it is NOT reusable.(10) Using fabricated tool (FT-21368, Figure8-9) remove and discard speed pickup nut (14, Figure 8-6)CAUTIONTo remove the turbine wheel, it may benecessary to use a non-metallic hammerDamage to the turbine wheel may occur.NOTEThe turbine wheel assembly consist ofturbine wheel (20), labyrinth seal (19),and bearing (18)(11) Remove and discard retainer nut (15) andkey washer (16) Remove turbine wheel assembly fromcompressor inlet housing (3)(12) Remove two antirotation pins (17) fromturbine wheel assembly(13) Using a bearing puller, remove bearing (18)from turbine wheel (20) Discard bearing(14) Using a bearing puller, remove labyrinthseal (19) from turbine wheel (20) Inspect labyrinth seal(19) for damage.Figure 8-7. Compressor Inlet Housing Bolt PatterChange 4 8-21
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