Repair Control Valve. (FIGURE 3-2)

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FIGURE 3-1. Main Reduction Gear Removal.

TM-55-1905-223-24-2 Main Reduction Gear for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

REPAIR

TM 55-1905-223-24-2

3-9. Repair Control Valve. (FIGURE 3-2)

This task covers: a. Disassembly, b. Repair, c. Assembly.

INITIAL SETUP

Equipment Condition

Tools

Deep well sockets, 1/2-inch drive,

TM 55-1905-223-10, Engine secured,

12 pt, 10mm thru 27mm,

tagged "Out of Service, Do Not Operate."

5120-01-113-8078

Refer to the following paragraph in this

Combination wrench set,

maintenance manual:

metric 10mm thru 24mm,

Control valve removed (para. 2-20).

5120-01-046-4979

Materials/Parts

Valve disk P/N 510-710-6 (qty 3)

Preformed packing kit P/N 1V5105

Detent disk P/N 510-710-11

Pressure spring P/N 510-710-12

Cleaning solvent, Item 4, Appendix C

Hydraulic fluid, Item 13, Appendix C

DISASSEMBLY

a. Remove four assembled washer screws (19).

b. Remove handle (18).

Remove linear actuating cylinders (1 and 2).

d. Remove four assembled washer screws (11) from linear actuating cylinder (12).

e. Remove cylinder (12).

Remove set screw (17).

g. Remove self locking nuts (13 and 3) from cylinder alignment shaft.

h. Remove linear actuating piston (14).

Remove preformed packing (16) and disk valve (15).

Remove capscrew (4) and spring pin (6).

3-8