G. Method No. 407G: Loose, Worn, or Damaged Pins (Aluminum or Magnesium Parts) Replacement
Replace loose, worn, or damaged pins in aluminum or magnesium-alloy parts as follows:
CAUTION: EXERCISE CARE NOT TO DAMAGE BASIC PART WHILE REMOVING PIN.
(1)
Remove loose, worn, or damaged pin from basic part.
WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE. DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
(2)
Clean hole that pin was removed from, using solvent (Federal Specification P-D-680, Type I) (SECTION VII). Allow solvent to evaporate completely.
NOTE: Refer to applicable manual to verify type of primer required.
(3)
Apply thin primer coat (Type I, Class C) (SECTION VII) to sides of hole to receive new pin.
(4)
While primer is still wet, press new pin into position specified in applicable manual. Wipe off excessive primer.
(5)
Allow primer to cure for four to six hours at room temperature, or bake for one hour at 180 to 275F (82 to 135C).
H. Method No. 407H: Loose, Worn, or Damaged Rosan Stud and Insert Replacement
Loose, worn, or damaged Rosan studs and inserts are repaired using different procedures. step (1) describes how to replace a Rosan stud, and step (2) describes how to replace a Rosan insert. See Figure 404.
(1) Replace defective studs.
CAUTION: EXERCISE CARE NOT TO DAMAGE ASSEMBLY IN WHICH STUD IS INSTALLED.
(a)
Cut stud off near to surface of assembly and then file cut end flat. Center punch flat end of stud.
(b)
Using a slightly oversize drill bit, large enough to cut inner serrations of lock ring, remove enough of stud to remove serrations.
(c)
Drill a small hole into stud to accommodate an appropriate “easyout” tool.
CAUTION: DO NOT ALLOW “EASYOUT” TO CATCH ON LOCK RING.
(d)
Install “easyout” into stud and back stud out of assembly.
NOTE: The remainder of lock ring shall come out with the stud.
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WARNING: USE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.
(e)
Using compressed air, blow out stud hole to remove debris.
(f)
Install new stud into assembly in accordance with applicable manual.
(g)
Drive or press lock ring into position.
(2) Replace defective inserts.
WARNING: USE CORRECT PERSONAL PROTECTION. PROCEDURES THAT NEED GRIND/MACHINE WORK WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.
CAUTION: EXERCISE CARE NOT TO DAMAGE ASSEMBLY IN WHICH INSERT IS INSTALLED.
(a)
Using a rotary mill of appropriate size, mill out lock ring until only a thin shell remains.
(b)
Remove remainder of lock ring using a scribe or other suitable tool.
(c)
Install an appropriate size “easyout” into insert and back insert out of assembly.
WARNING: USE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.
(d)
Using compressed air, blow out insert hole to remove debris.
(e)
Install new insert into assembly in accordance with applicable manual.
(f)
Drive or press lock ring into position.
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Replace Self-Locking Nut
Figure 404
Repair
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8. Repairing Gear Teeth
A. Method No. 408A: Minor Gear Teeth Involute Surface Damage Repair
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