TM 5-5420-228-24
HEU OR EARLY MODEL LOCKING CYLINDER REPAIR (Sheet 1 of 4)
PROCEDURE INDEX
Procedures
Page
Disassembly
Cleaning and Inspection
Assembly
TOOLS:
9/16 in. socket with 1/2 in. drive
Seal pack installation tool (HEU Model)
Ratchet with 1/2 in. drive
Cross-tip screwdriver
Flat-tip screwdriver
Spanner wrench (adjustable face type 0-2 in. capacity)
Torque wrench with 1/2 in. drive (0-175 lb-ft capacity) (0-237 Nm)
SUPPLIES:
Rags (Item 12, Appendix D)
Gloves (Item 27, Appendix D)
Dry cleaning solvent (Item 15, Appendix D)
Seal pack assembly (HEU Model)
Wiper ring (4 required) (Early Model)
Masking tape (HEU Model)
Preformed packing (2 required)
Scraper (HEU Model)
Spacer ring (2 required) (Early Model)
Preformed packing assembly (2 required) (Early Model)
Retainer (HEU Model)
Tape, insulation, electricians (Item 17, Appendix D)(Early Model)
PRELIMINARY PROCEDURE:
Remove locking cylinder (page 3-240 Early Model or page 3-242.1 HEU Model)
NOTE
Both ends of this cylinder are the same. Repair of only one end is shown in this task.
Repair of opposite end is the same.
DISASSEMBLY:
1.
Use masking tape, tape threads of piston rod (A).
2.
Using cross-tip screwdriver, remove four screws (B).
Go on to Sheet 2
