(b)
Attach the new cable to the old cable.
(c)
Pull the old cable out which also pulls the new cable through. Keep light tension on the new cable.
(d)
Install the pulleys (AMM 20-10-07/401) and air seals (AMM 20-10-04/401).
(e)
Finish installation according to procedures given in Section (3).
S 424-010
(2) To install a not prefabricated cable, do these steps:
NOTE: You may wish to replace zinc-only coated cables with
____ tin-over-zinc coated cables to minimize the amount of initial cable stretch.
(a)
Identify the cable that you will remove.
(b)
Prepare the new cable as told in the applicable system chapter.
(c)
Install only those fittings that will permit cable installation. 1) You can use a portable cable swager to install the
fittings.
(d)
Apply a proof load to the cable and installed fittings to do a check on swaging and to prestretch cable. See Fig. 401 for proof loads.
NOTE: If you use prestretched cable, it is not
____ necessary to put a load on all of the cable.
(e)
Rub the full length of the cable with a dry, lint-free cloth.
(f)
Apply a light thin layer of BMS 3-24 grease to carbon steel cables, then wipe the cable with a clean rag to leave a thin film of grease between the wires on the cable. Do not grease cres cables, it may be only cleaned with clean rag.
(g)
Make marks on the positions of the fittings not installed on the cable before installation.
(h)
Put a wrap on the old cable to keep it together.
(i)
Cut off the cable-end fitting of the old cable.
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MAINTENANCE MANUAL
(j) Make a splice to attach the old cable to the new cable.
NOTE: Make the splice of minimum diameter and sufficiently
____ strong not to break when pulled through. Make a splice only on the center strands of the cable and put tape on the loose outer strands.
(k)
Make sure the new cable is attached to the old cable.
(l)
Pull the old cable out while you keep light tension on the new cable.
(m)
Install the remaining fittings and apply a proof load to the fittings as shown in Fig. 401.
NOTE:____You must apply the full proof load gradually. You must apply the full proof load in more than three seconds. You must hold the full proof load for at least five seconds.
(n)
Finish installation according to procedures given in Section (3).
S 424-025
(3) Finish Installation (general)
(a)
If necessary, remove unwanted material from the surface of the control cable for full length of travel through fairleads, air seals, over pulleys, quadrants, and drums. Use a dry, lint-free cloth.
(b)
Apply a light thin layer of BMS 3-24 grease to carbon steel cables, then wipe the cable with a clean rag to leave a thin film of grease between the wires on the cable. Do not grease cres cables, it may be only cleaned with clean rag.
(c)
Install the turnbuckles, with the turnbuckle barrel installed an equal distance on the two threaded terminals. Do not let more than three threads show out of the barrel.
(d)
Remove the cable clamps and rig pins from the control cable and drums.
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(e)
(f)
(g)
(h)
(i)
757 MAINTENANCE MANUAL
To tighten the cable, refer to the temperature - tension chart in the system chapter.
NOTE: Use a tensiometer to do a check on the cable tension.
____ Apply the tensiometer to the cable a minimum of six inches from the turnbuckle terminal or other fittings. To make sure you get the correct cable tension, permit a minimum of one hour at constant ambient temperature (|5°F) for the airplane temperature to become stable.
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