Untitled Document
  1f   2001 RM 125    
  • Calculate equivalent P.bv and dynamic gas force from press test to determine preload on the icpsring.
  • However, the act gas force will be approx 1-2 lbs higher than calculated due to thermal expansion of the hot ctg oi.  For a more accurate icspr preload, set preload so the calculated icspr force is about 2lbs less than actual.
        vs_fics
          kg/mm   icspr rate
zero indicates the
icspr did not have prel-->
    mm   icspr prel (+nu . . not zero)
   
          mm   ctg rod dia
          mm   icpist dia
            mm   icrod dia
          mm   dyno test stroke
            mm   dyno prel
             mm   9 oclock gas test position
   
  Results    
        907.92     mm^2   icpist area
      78.54     mm^2   icrod area
         829.38     mm^2   icpist area - icrod area
      126.2     mm   ctg rod stroke
      113.1     mm2   ctg rod area
      14272.88     mm3   ctg rod vol
     17.21     mm    icpist stroke
        17.21     mm   icspr stroke (icpist_stroke + prel)
        0     kgf   icspr force kg
   
  Fk Dyno . press targ tab hjas dynamic gas force from the for pressure test.    

Fork pressure tests do not include the full fork, but only the (sealed) twin chamber cartridge assembly.  Shock pressure tests include the full shock.  Gas force from a shock press test is comes from the nitrogen charge. Gas force from a fork press test comes from the bv icpiston and icspring.  (the spriing pushing against the icpist create pressure in P.bv.  the fork ctg gas force reading is reliant on the stroke depoth of the 12.25 mm ctg rod.  The deeper the storoek, the more fluid is disalace d byh the ctg ride whichj in turn move the icpsit further.

hThe gas force from a twin chamber pressure cartridge comes from the icspring
    0     psi   P.bv psi
  0     lbf   equiv dynamic gas force
         (DFF 1 leg, SFF not halved)