DISASSEMBLY - TM-55-1905-223-24-100119

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Repair Hydraulic Hand Pump

TM-55-1905-223-24-10 Bow Ramp Assembly for Landing Craft Utility (LCU) NSN 1905-01-154- 1191 Manual

FIGURE 4-5. Hydraulic Hand Pump Assembly.

TM 55-1905-223-24-10

CAUTION

Cleanliness and care during repair are important. Before disassembly of any

components, plug all ports and thoroughly wash the outside of assembly with

cleaning solution to remove grit and dirt. When removing internal components,

care must be taken so that sealing surfaces are not scratched or otherwise

damaged. Inspect all packing grooves and mating surfaces for severe wear or

other damage. Any metal parts showing severe wear should be replaced.

DISASSEMBLY

a. Remove retaining pins (3) and straight headed pins (2) from piston (4).

b. Remove socket handle (1) and spring pin (28)

c. Remove piston pump (4) and rigid connecting link (29). From piston pump, remove preformed packing (5).

Remove piston pump wiper (30) from base (20) by forcing a small flat tip screwdriver under one edge of piston

wiper. Discard packing.

NOTE

Wiper is a press fit into base.

d. Remove hex plug (21) from pum p base (20); remove hex plug (7) and seal (6); and then remove relief valve

assembly (parts 6 through 15).

e. Disassemble relief valve as follows:

(1) Press or drift out spring pin (9) from relief valve piston (10).

(2) Remove spring (8).

(3) Remove preformed packings (11,13,14,15).

(4) Remove rubber ball (12).

NOTE

Oil seal is a press fit in the hex plug.

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