TM 55-1520-240-23-3
3-10
INSTALL LANDING GEAR WHEEL CUPS AND KEYS
3-10
INITIAL SETUP
Applicable Configurations:
All
Tools:
Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692
Torque Wrench, 30 to 150 Inch-Pounds
Container to Hold Wheel and Boil Water
Oven, or Source of Heat to Boil Water
Ball Staking Tool, 3/32 Inch, Rockwell Hardness C60,
32 RMS Finish
Materials:
Kevlar Gloves (E187)
Gloves (E186)
Antiseize Compound (E77)
Acetone (E20)
Sealant (E336)
Personnel Required:
Medium Helicopter Repairer
Inspector
References:
TM 55-1520-240-23P
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 install them.
Keep bearing cups in refrigerator or
freezer until needed.
1.
Expand wheel halves (1 and 2) by boiling in
water for 30 minutes or heating in an oven. Do
not exceed 300ºF (149ºC) in oven.
2.
Install two bearing cups (3).
2.1.
Allow wheel halves (1 and 2) to cool.
2.2.
Measure width of eight wheel keys (4). Width of
key shall not be less than 0.690 inch.
3-31
