0014 00  TM 10-1670-287-23&P  STROKE SIMULATOR TEST  Conduct a Stroke Simulator Test for the MC-4 with a Main Mounted AR2 as follows:  The Stroke Simulator must be able to pull the main ripcord pin  positively and completely to ensure adequate travel of the AR2  power cable. Inadequate travel of the AR2 power cable may cause  the parachute to not deploy, resulting in serious injury or death of  the parachutist. The Stroke Simulator Test (power cable length of travel) will be  performed each time the main parachute is initially placed in  service, each time the main parachute is packed, each time a power  cable is installed on the harness/container, when the AR2 has  actuated during a jump, and whenever the main closing loop has  been replaced.  NOTE  NOTE  WARNING  If ripcord pin fails to pull completely, check the length of the main  closing loop, condition of the Navy stiffener, power cable housing  and routing of power cable assembly.  Change 2  0014 00-37  1.  Test routing and installation of the power cable assembly in the parachute harness/container while  the harness/container is being worn in the normal fashion.  2.  Connect stroke simulator to power cable assembly in place of the AR2.  3.  Firmly hold stroke simulator adjacent to the AR2 pocket in a vertical orientation (i.e. stroke simulator  plunger pointing down).  4.  With assistance from another individual, carefully attach a 33-pound weight to the stroke simulator  plunger and very slowly remove your hand from under the weight to allow the weight to be slowly  transferred to the stroke simulator.  5.  The weight must completely withdraw the ripcord pin within the available stroke.  6.  Maintain control of the main pilot chute in an effort to prevent the entire contents of the main  parachute from falling to the floor.  7.  If the 33-pound weight hesitates or fails to pull the ripcord pins, remove and inspect the entire power  cable assembly IAW WP 0046 00 of this technical manual, and TM 10-1670-305-23&P, WP 0019 00. If unserviceable, replace with a new item from stock, then repeat Stroke Simulator Test above. If the  system fails a second time, it must be tagged and removed from service IAW WP 0011 00.  8.  Detach stroke simulator from power cable. 