TM   9-2320-273-20 FRAME. 11-13.  FIFTH  WHEEL  MAINTENANCE  (Continued). ACTION REMARKS A.  ADJUSTMENT  (M915  ONLY)  (Continued). NOTE To  install  the  fifth  wheel  lock  tester,  the fifth  wheel  lock  jaws  must  be  open.  Do  step 1 to open lock jaws, if necessary. 1.  Secondary  lock  handle  (10) a. release handle (9), and lock  jaws  (6). 2.  5th  wheel  lock  tester  (1). 3.  Nut  (11). 4.  Fifth  wheel  lock  tester  (1). b. a. b. c. d. e. a. b. a. b. Pull  out  secondary  lock  han- dle  (10)  until  it  catches  on  the 5th  wheel  plate  assembly  (7). Pull out release handle and pry  open  lock  jaws  (6). Grasp  handle  of  king  pin plate  (4)  and  place  king  pin (3)  into  lock  jaws  (6). Place  lever  (2)  over  front  of 5th  wheel  plate  assembly  (7). While  pushing  down  on  king pin  plate  (4),  rotate  lever (2),  away  from  5th  wheel plate  assembly  (7)  until king  pin  (3)  is  locked  in lock  jaws  (6). Position bar (5) over edge of  cross  tie  (8). Pry  forward  with  lever  (2) and  rearward  with  bar  (5) to   check   for   play   (1/8” (.31 cm) or less). Turn   nut   counter-clockwise to  allow  for  yoke  (13)  to slide  down  and  reposition on  the  lock  jaws  (6). Tighten   nut   (11)   until rubber  block  (12)  fits snugly  against  the  5th wheel  plate  assembly,  but stiII  can  be  turned  by  hand. Rotate  lever  (2)  towards 5th  wheel  plate  assembly  (7). Position  bar  (5)  on  edge  of cross tie (8), using leverage remove  king  pin  (3)  from lock  jaws  (6). Be sure king pin plate (4) is  flat  against  5th  wheel plate  assembly  (7)  during this   operation. Do  step  3  to  adjust  lock jaws (6), if necessary. If  there  is  still  play  after adjusting  lock  jaws  (6),  refer to  Direct  Support  and  Gen- eral  Support  Maintenance. 11-28      Change  2 LOCATION/ITEM