TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
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TM 9-2815-220-24 CRANKSHAFT MAIN BEARINGS INSPECTION 0138 00 INSPECTION (Continued) NOTE To avoid interference with the starter driven gear shaft, it is necessary to install lower number 7 tie rod from the right side of block. Care should be taken so that tie rods extend equally on both sides of block. 7. Install fourteen tie rods (12). a. Install seven washers plates (13) and slotted nuts (14) onto tie rods (12). b. Push tie rods (12) with washer plates and nuts (14) through crankcase (5). c. Install remaining seven washer plates (13) and slotted nuts (14) onto opposite end of tie rods (12). Finger tighten only at this time. 12 13 14 13 CAUTION The procedure for tightening main bearing cap nuts incorporates both torque and stud stretch. The untorqued height of the studs must first be measured, then the studs are torqued incrementally to a final value, and finally the stretch of the stud is measured. Stud stretch is defined as the difference between the untorqued height and the torqued height of the studs. Any stud that exceeds the maximum stretch (0.024 inch, or 0.6096 mm) prior to obtaining the minimum torque (58 foot-pounds, or 79 N•m) must be replaced. Any stud that reaches maximum torque (69 foot-pounds, or 94 N•m) prior to obtaining minimum stretch (0.019 inch, or 0.4826 mm) must be replaced. Do not disturb dial indicator setting or position used for checking stud stretch. Incorrect stretch measurement will result if indicator setting is changed - which could result in premature failure of engine parts. WP 0138 00-6