TM   55-4920-428-13 Procedures Equipment  Is Item Interval Item to be Check for and have repaired Not   Ready/ No. B D A Inspected or adjusted as necessary Available  If: 14 15 Rotary switches Secure  mounting,  positive Switch  detents  are detent. Tighten loose not positive. switches. Hose s Cracks,  breaks,  frayed covering and weak spots. Replace damaged or de- fective hoses. Bent shaft and distortion. Replace defective check valve. 16 17 ILCA manifold check valves Condition.  Replace  if defective. ILCA manifold, SAS manifold, relief valve adapter, preformed  packings Dial  indicating post Damage  which  prevents securing  dial  indicators. Replace  post. Leaks, loose hardware and proper operation. Tighten hardware or replace valve. Bent  shafts,  smooth  opera- tion, condition of lens, proper attachment. Replace defective indicator. Damage  which  prevents proper insertion. Replace defective pin. Secure  mounting  and positive  operation. 18 Control and selector valves 19 20 Dial  indicators 21 22 Rig pins Requirements of check are not met. Push-on push-off switches Requirements of check are not met. Secure  mounting  and positive  operation. Momentary switches 23 24 Secure   mounting   and positive   operation. Requirements of  check  are not  met. Toggle  switch Check   for   extended   indi- cator.   If   extended,   reset with  hydraulic  power applied. Requirements of  check  are not  met. Filter  contamination indicator 25 Change   1_2-23