INSTALL LANDING GEAR WHEEL CUPS AND KEYS (Continued)

TM 55-1520-240-23-3 3-10 INSTALL LANDING GEAR WHEEL CUPS AND KEYS (Continued) 3-10 3. Install eight wheel keys (4) on bosses (5) in wheel half (2). Tap each key lightly if needed to firmly seat it on boss. Acetone (E20) is extremely flammable. It can be toxic. Avoid inhaling. Use only with adequate ventilation. Avoid contact with skin, eyes, or clothing. Keep away from heat, sparks, or open flame. In case of contact, immediately flush skin or eyes with water for at least 15 minutes. Get medical attention for eyes. 4. Clean screws (6) and keys (4). Use acetone (E20). Wear gloves (E186). Antiseize compound (E77) is extremely toxic. It can irritate skin and cause burns. Avoid inhaling. Use only with adequate ventilation. Avoid contact with skin, eyes, or clothing. In case of contact, immediately flush skin or eyes with water for at least 15 minutes. Get medical attention for eyes. 5. Lubricate thread of eight screws (6). Use antiseize compound (E77). 6. Install screws (6) in keys (4). Torque screws to 70 inch-pounds. 7. Using a 3/32 (0.0937) inch (2.38 mm) ball staking tool with a hardness of Rockwell 060 and surface finish of 32 RMS or item E-312, stake each screw (6) to slot (7) in key (4) as follows: Start the stake on the outboard side of the screw centerline. Initially hold the staking tool vertically and apply a series of sharp blows with a hammer. The screw material should flow outward toward the slot. Once a clean ball depression is established, angle the staking tool to provide a 15º to 20º outboard component to complete the stake. Insure enough material is displaced on the screwhead to resist loosening. The staked lip will fill approximately (1/3) of the staking slot. 3-32