A B C D E F Figure  13-25. Steps in servicing a landing gear shock strut include releasing the air from the strut and removing the service valve from  the top of the strut to permit the introduction of hydraulic fluid. Note that the strut is illustrated horizontally. On an actual aircraft  installation, the strut is serviced in the vertical position (landing gear down).  compression of the strut to expel the entrapped air. An  example procedure for bleeding the shock strut follows. 1.  Construct and attach a bleed hose containing a fitting  suitable for making an airtight connection at the shock  strut service valve port. Ensure a long enough hose to  reach the ground while the aircraft is on jacks. 2.  Ja ck the aircraft until the shock struts are fully  extended. 3.  Release any air pressure in the shock strut. 4.  Remove the air service valve assembly. 5.  Fil l the strut to the level of the service port with  approved hydraulic fluid. 6.  Attach the bleed hose to the service port and insert the  free end of the hose into a container of clean hydraulic  fluid. The hose end must remain below the surface of  the fluid. 7.  Place an exerciser jack or other suitable jack under the  shock strut jacking point. Compress and extend the  strut fully by raising and lowering the jack. Continue  this process until all air bubbles cease to form in the  container of hydraulic fluid. Compress the strut slowly  and allow it to extend by its own weight. 8.  Remove the exerciser jack. Lower the aircraft and  remove all other jacks. 13-14