Reassembly (cont) - TM-5-6115-612-34

OVERHAUL OF TURBINE ASSEMBLY. (cont) - TM-5-6115-612-34_218

figure 8-14. measuring compressor impeller vane clearance using fabricated tool ft-21360

TM-5-6115-612-34 Gas Turbine Engine Driven Aviation Generator Set Manual
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ARMY TM 5-6115-612-34 NAVY AG-320B0-MME-00 84. OVERHAUL OF TURBINE ASSEMBLY. (cont) f. Reassembly (cont) (9) Use wire gage and check clearance between compressor wheel blade tips and inlet housing. Adjust shim set (step (5) above) as necessary to attain clearance of 0 014-0 016 inch (0 036-0 041 cm) Type of Thickness Part No Qty Shim/Washer Bearing Shim 0 024 Inch 101444-1 Metallic Shim 0 002 Inch 101414-4 4 ea Metallic Shim 0 005 Inch 101414-5 3 ea Metallic Shim 0 020 Inch 101414-6 2 ea Wave Washer 101437-1 (10) When correct clearance is attained, install production bearing (37, Figure 8-6) in step (1) Repeat steps (2) and (3) Ensure that bearing retainer nut (40) is positioned to allow tabs of tab washer (38) to be bent Repeat steps (4) thru (5) Install preformed packing (39). Coat outside diameter of bearing housing at packing and mating surface of compressor inlet housing with petrolatum, VV-P-236 CAUTION DO NOT bend tabs on washers (35) (11) Using jackscrews as a guide and to keep shims in place, place correct shim stack (37) and bearing housing (36) in compressor inlet housing (3). Secure with washers (35) and bolts (34). Torque bolts to 70-88 inch pounds (7.91-9 04 Nm). Bend tabs on tab washer (38). Lockwire using MS20995-C32 lockwire. (12) Install labyrinth seal (29) on back of compressor wheel (33) WARNING To prevent injury, ensure that insulated gloves are worn when handling dry Ice and cold parts CAUTION To prevent engine failure, ensure that retaining ring (30) that secures oil passage plug (31) is correctly Installed (13) Install preformed packing (32) on oil passage plug (31) Secure in place in diffuser (2) with retaining ring (30) Ensure that retaining ring is under retaining groove CAUTION If diffuser (2) drops into place without heating and cooling, replace diffuser (14) Place diffuser (2) In solution of dry ice and alcohol for approximately 15 minutes. Use soft flame and heat outside of inlet housing. (15) Remove diffuser from solution and Install in compressor inlet housing (3) Ensure that oil tube holes and bolt holes are alined. (16) Install bolts (13) in the 1, 4, 7, 10, 13, and 16 positions. (See Figure 8-7.) Secure with washers (11 and 12, Figure 8-6) and nuts (10). Torque to 74-79 Inch pounds (8.36-8.93 Nm) 8-36 Change 4

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