TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM 9-2815-202-34 6-38. TURBOCHARGER REPAIR (Cont) (20) Heat impeller (32) temperature of 350-375°F (177-191 o C) for 10 minutes maximum. (21) Install impeller (32) on rotor assembly (31) CAUTION Use a wrench with a double- universal joint to tighten impeller nut. A fixed wrench or ratchet can side load rotor assembly and bend shaft. (22) (23) (24) (25) (26) While impeller (32) is still hot, install washer (30) and nut (29). Torque nut to 30-35 Ib-ft (41-47 N-m). After impeller (32) has cooled to less than 150 o F (66°C), torque nut (29) to 40-45 Ib-ft (54-61 N-m). Apply thin coat of sealing compound to diffuser face (27) mating with compressor housing (11). Apply sealing compound around bolt holes in compressor housing. Install compressor housing (11) on diffuser (27). Aline scribe marks on compressor housing and center housing, Secure compressor housing (11) in place with twelve bolts (14). Torque bolts to 150-200 lb-in (17-22.6 N-m). NOTE Nozzle bolts are not symmetrical, Sides of bolt heads must press firmly against nozzle. If the bottom of any bolt head contacts the turbine housing, rotate that bolt 180 degrees. (27) Install nozzle (22) in turbine housing (13) and secure with three bolts (21), three gaskets (20), and three nuts (19). Torque nuts to 35-45 lb-in (4-5.1 N-m). (28) If removed, install studs (23 and 24) into original locations as marked. (29) Place shims (18) over studs (23 and 24) in turbine housing (13). NOTE Aline scribe marks on center housing assembly and turbine housing. (30) Place turbine housing (13) on center housing assembly (12). (31) Place lifting bracket (15) over studs (23) where marked. 6-52