TM 10-3930-671-24 Critical Fastener Torque Checks (Cont’d) NOTE The    following    items    illustrate    procedures    for    critical torque checks for selected items. Transaxle Mounting Mounting  bolts,  nuts,  washers,  and  threaded  holes  are not to be lubricated. Impact wrenches to be used only to snug-up  the  fasteners.  Torque  measuring  wrench  must be used to obtain final torque values. NOTE Also    check    drive    wheel    bearings    when    wheels    are blocked up. See Section 3.2. 1. Remove the frame side compartment doors from each side of the truck. 2. Check   transaxle   mounting   bolts   and   nuts   for correct torque. Tighten each bolt to torque spec: 400-440 Ib-ft (542-597 N•m). 1.    Raise drive  wheels  off  the  floor.  With  upright  in full back tilt, place wood blocking beneath rails or upright. 2.    Check the transaxle mounting bolts and nuts for correct torque. 3.    After checking upright mounting as noted below, install drive wheels. Upright Mounting 1.    Check  the  upright  trunnion  bearings  for  wear. Check    the    trunnion    brackets    for    cracks    or damage. 2.    Check  the  upright  mounting  bracket  bolts.  Be sure  no  bolts  are  missing.  Tighten  each  bolt  to correct   torque   spec:   273-302   Ib-ft   (370-410 N•m). 3.    Check   tilt   cylinder   mounting   and   attachment fasteners for safe installation. Tighten tilt cylinder yoke  clamp  bolts  to  torque  spec:  120-140  Ib-ft (163-190 Nom). 4.    Check  and  tighten  the  load  backrest  extension mounting   bolts   to   torque   spec:   177-199   Ib-ft (240-270 N•m). F-57