TM 9-2330-356-14
(4) If semitrailer has a bolt-on upper coupler
(kingpin) assembly, check tightness of bolts holding plate
to frame. If bolts are loose, tighten them to 140 lb.-ft.
(5) For replacement of bolt-on upper coupler
(kingpin) assembly, refer to direct support maintenance.
For replacement of bolt-on kingpin, refer to step b.
b. Bolt-on Kingpin Replacement (Early Models)
(1) Remove eight mounting bolts and remove
kingpin.
(2) Coat mating surfaces with corrosion
preventive (item 10, Appendix E) (fig. 4-91).
(3) Install kingpin and tighten bolts to
250-275 lb.-ft.
4-111
