TM 9-2330-392-14&P
4-28A HYDRAULIC BRAKE ACTUATOR ASSEMBLY REPAIR.
This task covers:
a. Disassesmbly
b. Cleaning and Inspection
c. Assembly
Initial Setup:
Equipment Conditions:
Parts:
Handbrakes engaged.
Safety chains removed (para 4-35).
Tool/Test Equipment:
General mechanics tool hit
Common No. 1 shop set
Materials/
Rags (Item 10, Appendix E)
Dry Cleaning Solvent (Item 5, Appendix E)
Wire Brush (Item 3, Appendix E)
Two Lock nuts
Container
Cotter Pin
Four Capscrews
a. DISASSEMBLY
1.
2.
3.
4.
5.
6.
Remove cap (1) from master cylinder (5).
Remove cover (9) from master cylinder (5). Then reinstall cap (1) on master cylinder (5).
NOTE
Use a suitable container to catch any draining brake fluid. Ensure that all spills are
cleaned up.
Master cylinder orifice (4) requires a 12-mm wrench.
Disconnect flex brake line (2) from master cylinder orifice (4) and install temporary plug in flex brake
line fitting end (3).
Remove cotter pin (7) from master pin (6). Remove master pin (6) and washer (10). Discard cotter pin.
Remove lunette (11), with damper (15) and two rollers (14) attached, from brake actuator (8).
Remove cotter pin (13), damper pin (12), and washer (16) securing damper (15) to lunette (11). Discard
cotter pin.
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