TM 10-3930-671-24 9.5  Steer Axles Background .....................................................................................................F-419 Steer Axle Specifications.................................................................................F-419 Mounting..........................................................................................................F-419 Steer Axle - (Type 2) .......................................................................................F-420 This  section  reviews  the  arrangement  of  the  steer  axle assembly  and  components  used  in  GPX   25   E   Diesel trucks. For    clarity    in    distinguishing    the    applicable    service procedures,   the   axle   arrangement   is    referred    to    by (Type) for Service Manual reference only. Background Since the initial release of GCS/GPS 17-30 trucks there have been design changes and product improvements in the   original   5-8000   steer    axles    which    affect    service procedures. A  major  change  in  style  of  the  main  body  and  steering cylinder  has  been  introduced  in  later  (mid  1989)  truck models. Steer Axle Specifications One-piece   fabricated   main   body   assembly   using   steel box-type  construction.    Steering  cylinder  is  an  integral separate  2-way  actuator  mounted  within  the  main  body and joined to steering knuckles by links.  All bearings are replaceable and have lubrication fittings. Mounting The  mounting  installation  of  the  steer  axle  in  the  truck chassis  axle  are  to  be  noted  for  service  maintenance. Refer to Section 9.  7, Steer Axle Removal/lnstallation. F-419