SECTION IV – REPAIR 7-更换钢丝螺套、螺柱、衬套、销钉和螺母板-C.Method No. 407C:松动或损坏的Keensert螺柱修复

7.Replacing Inserts, Studs, Bushings, Pins and Nutplates

更换钢丝螺套、螺柱、衬套、销钉和螺母板

C.Method No. 407C: Loose or Damaged Keensert Stud Repair

Method No. 407C:松动或损坏的Keensert螺柱修复

Loose or damaged Keensert studs are repaired using different procedures. Step (1) describes repair of a loose Keenert stud, and Step (2) describes repair of a damaged Keensert stud.

松动或损坏的Keensert螺柱可通过不同方法进行修复。步骤(1)说明松动Keensert螺柱的修复方法，步骤(2)说明损坏Keensert螺柱的修复方法。

NOTE: Rotational movement of Keensert studs in component undergoing repair is not permitted. If rotational movement exists, replace stud be completing Step (2).

注意：修理的部件中有转动的Keensert螺柱是不允许的。若发现螺柱存在旋转，应立即更换该螺柱并完成步骤(2)。

(1) Loose Keensert studs are repaired as follows:

松动的Keensert螺柱修复方法如下：

(a) Fabricate a punch of suitable material with blade width and thickness slightly smaller than keyway for stud locking key.

制作一个合适材料的冲头，其刀片宽度和厚度略小于螺柱锁紧键的键槽。

(b) Drive lock keys of stud further into keyways of stud until stud is tight. Use punch.

将螺柱的锁紧键进一步插入其键槽，直至螺柱完全上紧。使用冲头。

NOTE: Depth of key must not exceed a quantity equal to half the length of stud material inserted in the assembly. If stud will not tighten, replace stud. Refer to Step (2).

注意：键槽深度不得超过螺柱材料长度的一半。若螺柱无法上紧，请更换螺柱。请参阅步骤(2)。

(c) If threads of hole for the stud are damaged, tap new threads in the hole one size larger than existing threads. Use a new stud with matching threads.

若螺柱孔的螺纹受损，应在孔内加工新螺纹，螺纹尺寸应比原有螺纹大一个规格。使用螺纹匹配的新螺柱。

NOTE: Threads on external portion of stud must be the same as on stud removed.

注意：螺柱外侧的螺纹必须与拆卸后的螺柱保持一致。

(d) Wipe a thin even coat of primer C03-0007 to the area around stud to seal the surfaces from the joint in all directions.

在螺柱周围均匀涂抹一层薄薄的底漆C03-0007，以使表面在各个方向上都与接头完全密封。

(e) Let primer to cure for four to six hours at 180 to 275°F (82 to 135°C) prior to assembly usage.

组装前需将底漆在180至275°F（82至135°C）下固化4至6小时。

(2) Damaged Keensert studs are repaired as follows:

损坏的Keensert螺柱的修复方法如下：

(a) Cut off stud just below mounting surface to expose pilot hole for removal drill.

在安装面下方切去螺柱，露出导向孔以便取出钻头。

NOTE: Studs less than three-eighths inch diameter do not have a pilot hole.

注意：直径小于3/8英寸的螺栓无需钻导向孔。

CAUTION: DO NOT LET DRILL TO TOUCH HOUSING OR DAMAGE MAY RESULT.

注意：切勿让钻头接触外壳，否则可能导致损坏。

(b) Drill out stud until only a thin shell remains. Use pilot hole as a guide.

将螺柱钻至仅剩薄壳，以导向孔为基准导向。

(c) Bend locking keys inward and break them off.

将锁定键向内弯曲，然后将其折断。

(d) Remove stud with an “easyout” tool.

用“easyout”工具拆下螺钉。

WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE. DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.

警告：溶剂蒸气有毒且易燃。请勿吸入蒸气。注意防火措施。

(e) Clean hole from which stud was removed. Use degreasing solvent C04-0025.

清理已拆卸螺柱的孔洞，使用脱脂溶剂C04-0025。

(f) Apply a thin even coat of wet primer C03-0007 to the threaded hole to receive the replacement stud.

在螺纹孔上均匀涂抹一层薄薄的湿底漆C03-0007，以便安装更换的螺柱。

NOTE: Application of primer must be uniform and neat in appearance without bare spots or runs.

注：底漆的涂布必须均匀且外观整洁，不得出现裸露斑点或条纹。

1 Coat blind holes to cover adjacent walls with primer. The bottom needs not be covered. Let primer dry two or three minutes before installing stud.

用底漆涂刷盲孔，以覆盖相邻壁面。底部无需涂刷。安装螺柱前，待底漆干燥2至3分钟。

2 Coat through-holes in components to cover all internal surfaces through to adjacent painted surfaces. The end of stud needs not be covered.

在部件的贯穿孔（通孔）上涂漆，以覆盖所有内部表面直至相邻的涂漆表面。螺柱末端无需涂漆。

(g) While the primer is still soft, turn stud into threaded hole until step is 0.010 to 0.030 inch (0.245 to 0.762 mm) below machined surface.

当底漆仍保持柔软状态时，将螺柱旋入螺纹孔，直至台阶位置位于加工表面下方0.010至0.030英寸（0.245至0.762毫米）处。

(h) Drive lock keys into keyways of stud until flush with step of stud. Use a punch tool.

将锁定键旋入螺柱的键槽，直至与螺柱台阶齐平。使用冲头工具。

(i) Wipe a thin, even wet coat of primer to surfaces adjacent to the locking device of the Keensert studs.

在Keensert螺柱的锁定装置附近表面均匀涂抹一层薄薄的湿底漆。

NOTE: A thin even coat of primer must be applied to the area around the stud to seal all surface from the joint in all directions.

注意：必须在螺柱周围均匀涂抹一层薄薄的底漆，以确保所有表面在各个方向上都与接头完全密封。

(j) Let primer to cure for four to six hours at room temperature, or for one hour at 180 to 275°F (82 to 135°C) prior to assembly usage.

组装前需将底漆在室温下固化4-6小时，或在180-275华氏度（82-135摄氏度）下固化1小时。