Replacement bolts should be of equal or greaterstrength than the original.All bolts should be tightened to the propertorque value.Check for hydraulic and pneumatic leaks.Be alert for any unusual sounds that mayindicatemalfunctioningequipment.Reportthese conditions to the officer in charge.Check spares on hand against allowable spareslist. Replenish spare parts monthly.Maintenance personnel must establish andcarefully maintain the Recovery Wire RopeHistory Chart, recording all wire rope data.The replacement of any O-ring, V-ring, or otherpressure seal necessitates a high-pressure test oftheequipmentbeforeresumingarrestingoperations. Before you can pressure test newlyinstalled seals, it is necessary that the unit standfor a period of 1 hour before the seals can beaccepted.Once each year (or as modified by appropriatetechnical publications), drain the ethylene glycol fromthe system and replace with fresh fluid.REPLACING PURCHASE CABLESDuring recovery operations, malfunctions maydevelop in the engine and cable system, causing thepurchase cable to pull out of the sheave arrangement orbreak below deck, close to or at the engine, resulting inshutdown of the system. Also, conditions occur inwhich initial reeving of the engine is necessary or oldpurchase cable is required to be replaced by newpurchase cable. Any or all of these conditions can occuron single or endless reeved engines.If the old cable is still reeved, do not pull it out.When possible, the old cable should be used to pull inthe new. Even if the old cable is only partially reeved, itwill prove useful. Reeving is very much simplified ifcable already reeved in the proper way can be used. Adecision must be made for each particular engine as towhether it is easier to feed the new cable from theengine and pull from the flight deck level with a tractor,or feed from the flight deck and pull from the enginewith block and tackle. In either case, the cable shouldbe pulled very slowly, and communication should bemaintained between engine and flight deck, so that thepulling can be stopped quickly if there is danger ofpulling a kink into the line. If the purchase cable issevered below deck but still reeved, isolate the breakand thread a 9/16-inch cable through the system andbutt braze this to the longer length to provide acontinuous line for pulling in the new cable.The following procedures should be followed inreplacing purchase cables:1.Initial reeving of an engine is facilitated byhand-threading the complete fairlead systemand engine with a length of 9/16-inch cable.After reeving the 9/16-inch cable, splice andbraze the end to the purchase cable and pull thelarger into the system with the smaller. Thissmaller-diameter cable is easier to pushthrough the fairlead pipes and wrap around thesheaves before pulling in the purchase cable.2.To thread the cable through the deck andfairlead sheaves, remove the sheave covers andpull out the sheaves. Push the cable through thefairlead pipes from sheave housing to sheavehousing. Then slip the cable into the sheavegroove as the sheave is replaced in the housing.When the cable is fully threaded, replace thecovers.3.In reeving the engine, use only the original,approved reeving pattern. Study the reevingdiagram in the applicable NAVAIR main-tenance manuals, and be careful to pass thecable over the sheaves in the approvedsequence and through the appropriate fairleadsand guides.4.After the cable is reeved, the next step is toconnect the anchor end of each length. Thenthe cable must be stretched taut to determinethe correct location for the terminal of theopposite end.New cables acquire a stretch over the course of thefirst several engagements. This lengthening of cablesdecreasesthedistancebetweencrossheadandcrosshead stop in the BATTERY position, and this inturn increases the fluid capacity of the hydraulic systemand makes it necessary to add fluid to maintain the fluidlevel. If the distance from crosshead to crosshead stopin the BATTERY position becomes less than theminimum allowable clearance of 1 inch between thecrosshead and the crosshead stop, it becomes necessaryto crop the cable and repour a terminal to readjust theclearance to 6 inches between the crosshead and thestop. The clearance between the crosshead andcrosshead stop with newly installed purchase cables is3-46
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