Introduction Page Description For an example of a 122SD and Coronado 132 Maintenance Manual page, see Fig. 1 . A C B F D E 08/13/2013 A. Maintenance Operation Number consists of the Group Number followed by the Sequence Number B. Group Title C. Group Number D. Vehicle Names E. Release Date F. Group Number/Page Number f020185 Fig. 1, Example of a 122SD and Coronado 132 Maintenance Manual Page 122SD and Coronado 132 Maintenance Manual, September 2013 41 Driveline 41−01 Driveline Inspection 1. Park the vehicle on a flat, level surface, apply the parking brakes, and chock the tires.
WARNING Self−locking bearing−cup or bearing−strap cap− screws must not be reused; replace the cap− 2 screws with new ones. Also, do not undertighten or overtighten any bearing−cup or bearing−strap 1 capscrews. A loose or broken fastener at any 1 point in the driveline weakens the driveline con− 2 nection, which could cause serious vehicle dam− 12/16/2008 f410529 age, or could result in a driveshaft separating Tighten the capscrews in a counterclockwise sequence, from the vehicle, possibly causing loss of vehicle starting with either number 1 position. c oo r n dt ero atl ht .hat could result in serious personal injury Fig.
1, Tightening S Se tq rau pe n Cc ae p, sH ca relf w−R sound Yoke Bearing 2. Check the torque of the bearing−cup or bearing− strap capscrews; see Table 1 for installed torque 3. Check the driveline yokes for cracks, and check values. end−yokes for looseness; see Fig. 2. Remove and discard any loose capscrews. Do Replace cracked yokes. not reuse any loosened self−locking capscrews; If any end−yoke can be moved in or out on its they are designed for one−time installation only. shaft, or can be rocked on its shaft, disconnect Replace all loosened and removed capscrews the driveshaft and U−joint from the yoke, then with new ones.
Tighten the new capscrews as check the drive component’s shaft seal for leak− specified in Table 1. age or other visible damage that may have been For half−round yokes with bearing straps, tighten caused by the loose yoke. Replace the seal if the bearing−strap capscrews following the tight− needed, then tighten the yoke nut. Refer to Sec− ening sequence shown in Fig. 1, in increments tion 41.00, Specifications 400 of the 122SD of 20 lbf·ft (25 N·m) to the torque specifications and Coronado Workshop Manual for torque listed in Table 1. specifications. If the yoke is still loose after tight− ening the yoke nut, replace the end−yoke and Bearing Cap or Bearing Strap Capscrew Torque yoke nut.
Specifications Replace the prevailing torque locknut (end−yoke U−Joint Type Torque: lbf·ft (N·m) nut) if it was removed for yoke replacement, seal replacement, or any other reason. Half−Round Yokes with Bearing Straps and 3/8−inch Capscrews 45−60 (60−80) 4. Check U−joint assemblies for wear by moving the (see Fig. 2, Ref. 8) driveshaft up and down, and from side to side. If H Sta rl af− pR so au nn dd 1Y /o 2k −ie ns c hw i Cth a pB se ca rr ein wg s 130−135 (175−185) a inn gy s m cao nv e bm ee fn et lt o of r th see e U n− , jo rein pt l ac cro es ts h ein U th −je o ib ne t a ar s− − (Fig. 2, Ref. 8) sembly. F Cu ul pl− sR o (Fu in gd . 3Y )okes with Bearing 43 (58) 5.
lC oh oe sc ek o i rf hth ae v em did es th ei rp io b rae ta er din , g b ya n ad tt em mo pu tin nt gin g to are R BeP aL r iS nge r Cie us p U s − (J Fo ii gn .t s 4 w )ith 125 (169) m too sv ide e t .h Ie f td hr eiv e bs eh aa rif nt gu p is a lon od s d eo ow nn , i ta s n sd h afr fo t,m o rside rattles, replace it. If the bearing mount is loose Table 1, Bearing Cap or Bearing Strap Capscrew on the frame, tighten the mounting fasteners to Torque Specifications the proper torque value. See Section 41.00, 122SD and Coronado 132 Maintenance Manual, January 2010 41/1 Bearing Cap or Bearing Strap Capscrew Torque Specifications U−Joint Type Torque:
lbf·ft (N·m) Half−Round Yokes with Bearing Straps and 3/8−inch Capscrews (see Fig. 2, Ref. 8) 45−60 (60−80) Half−Round Yokes with Bearing Straps and 1/2−inch Capscrews (Fig. 2, Ref. 8) 130−135 (175−185) Full−Round Yokes with Bearing Cups (Fig. 3) 43 (58) RPL Series U−Joints with Bearing Cups (Fig. 4) 125 (169)