TM 1-1500-204-23-1 (f) Wipe   with   a   cloth   moistened   with methyl ethyl ketone TT-M-261 (g) Apply          a     sufficient     amount     of contact  adhesive  1300Lto  cover  the  inside  surface  of the rubber and the mating surface. (h) Allow adhesive to dry until tacky. (i) Carefully  fit  and  press  the  molding over the edge of the panel. (j) Clean   dirt   and   dust   accumulation from the repaired panel using general purpose detergent.  Do not use methyl ethyl ketone for cleaning the fiberglass backing CAUTION Prolonged  contact  of  the  fiberglass to methyl ethyl ketone or acetone will result in detenoration of the resin. (k) Rinse   the   washed   area   with   clear water and dry panel with a soft cloth Then permit panel to dry out thoroughly. (I) Touch   up   repaired   areas   of   spall shield and fiberglass backing with acrylic lacquer, MIL-L- 81352 (m) Apply a base coat of epoxy primer, MIL-P-23377.        Feather    the    primer    coating    onto    to surrounding color coat. (n) Allow   the   primer   to   air   dry   for   a minimum of 30 minutes. (o) Apply two coats of acrylic lacquer to match the original finish color as applicable. 9-24.      Cargo   Tiedown   Equipment.      Cargo   tiedown equipment  devices  may  be  assembled  from  webbing, nets, rope, cables, or fittings Use snaps, hooks, clamps, buckles or other acceptable fasteners.  Install tensioning devices    or    other    means    to    provide    a    method    of tightening    and    adjusting    restraint    system.        Provide covers  or  guards  to  prevent  damage  to  or  jamming  of aircraft equipment, structure, or control cables.  Inspect and repair In accordance with the applicable maintenance manual. 9-25.  Vibration Isolators.  Vibration isolators are shock absorbing mountings which absorb vibrations or movements   of   a   component.      They   are   utilized   with armament equipment, electronic equipment, photographic equipment, instruments, instrument panels,    and    other    like    equipment    requiring    shock mounting. a.    Type  of  Vibration  Isolators.    Vibration  isolators are    commonly    classified    in    three    types    open-type, closed-type,  and  combined  vibration  isolator  mounting base type. (1) Open-type.    Open-type  vibration  isolators are   those   on   which   the   shock   absorbing   material   is exposed, and are usually so constructed that the load is supported  on  rubber  in  shear  (A  and  B,  figure  9-40)  or compression (C, figure 9-40). (2) Closed-type. Closed-type vibration isolators    are    those    on    which    the    shock    absorbing material  is  enclosed  by  a  metal  cup  or  housing  The shock absorbing material is usually a coil spring, rubber, or   metal   mesh   In   compression,   or   a   combination   of these materials as shown in figure 9-41. (3) Combined     vibration     isolator     mounting base  type.    Combined  vibration  Isolator  mounting  base type    vibration    isolators    are    formed    by    combining resilient  material  such  as  sponge  rubber,  metal  mesh pads,    or    coil    springs    with    a    mounting    base    and supporting structure as shown in figure 9-42. b. Installation of Vibration Isolators.  Installation of vibration  Isolators  should  be  accomplished  in  such  a manner    as    to    allow    free    movement    of    mounted equipment   with   adequate   clearance   around   brackets, piping lines, and other items of equipment.  Accomplish the    following    procedures    when    Installing    vibration isolators: (1) Measure vertical and horizontal clearance  between  equipment  and  nearest  supporting structure. NOTE A vertical and horizontal clearance of 1/16 inch shall be maintained. Maintain  adequate  distance  between mounted     equipment     and     nearest object  (bracket,  pipe,  line,  structure, etc.). 9-57