REMOVE LANDING GEAR WHEEL CUPS AND KEYS

TM 55-1520-240-23-3 3-9 REMOVE LANDING GEAR WHEEL CUPS AND KEYS 3-9 INITIAL SETUP Applicable Configurations: All Tools: Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692 Container to Hold Wheel and Boil Water Source of Heat to Boil Water, or Oven Materials: Carbon Dioxide (Dry Ice) (E92) Kevlar Gloves (E187) Personnel Required: Medium Helicopter Repairer Equipment Condition: Off Helicopter Task Tire and Tube Removed From Wheel (Task 3-8) 1. Remove eight screws (1) and keys (2) from inboard wheel half (3). Carbon dioxide (dry ice) (E92) causes severe burns (frost bite) and gives off toxic fumes. Use only in well-ventilated area. Do not get in eyes, on skin, or clothing. In case of contact, immediately flush with plenty of water. Get medical attention for eyes. Wear Kevlar gloves (E187) when handling heated or chilled parts. Injury to personnel can result. NOTE Bearing cups are a shrink fit. Wheel must be expanded to remove them. 2. Expand wheel halves (3 and 4) by boiling in water for 30 minutes or heating in an oven. Do not exceed 300ºF (149ºC) in oven. Pack cups (5) with dry ice (E92). 3. Remove bearing cups (5). FOLLOW-ON MAINTENANCE: None END OF TASK 3-30