TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202-34 (10) (11) (12) (13) (14) (15) (16) (17) Do not scuff or scratch bearings when installing shaft or bearing will seize during operation. Lubricate wheel shaft assembly (15) with engine oil. Position wheel shroud (18) against center housing (2). Insert wheel shaft assembly (15) through wheel shroud and into center housing. Place wheel shaft assembly (15), shroud (18), center housing (2), and backplate (5) upright in holding fixture. CAUTION Do not cock or force piston rings (24) in grooves. Rings are brittle and will snap easily. Install two piston rings (24) on thrust spacer (23). Lubricate thrust spacer (23) and piston rings (24) with engine oil. Slide spacer with rings over shaft assembly (15) and into bore in backplate (5). With compressor wheel (17) at 68 -78 o F, position it over shaft assembly (15). Lubricate shaft threads of shaft assembly (15) and wheel face on compressor wheel (17) with engine oil. Install retaining nut (16). Torque nut to 10-12 Ib-ft (14-17 N-m) to seat compressor wheel against thrust spacer. Loosen nut (16) and inspect nut face and front face of compressor wheel to insure they are smooth and clean. Tighten nut to 15-25 lb-in (2-3 N-m) torque. 4-181