Repair Helm Pump.

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REPLACEMENT

TM-55-1905-223-24-9 Steering Gear System for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

Straight Shaft.

TM 55-1905-223-24-9

4-12. Repair Helm Pump. (FIGURE 4-5)

This task covers:

a. Disassembly,

b. Repair,

c. Assembly.

INITIAL SETUP

Tools

Equipment Condition

Tool kit, general mechanic's,

TM 55-1905-223-10, Equipment shut down,

tagged "Out of Service."

Refer to the following paragraph in this

Materials/Parts

maintenance manual:

Helm pump removed, gasket (1) and

Inner race bearing, P/N 21-200009

seal (28) removed (paragraph 2-14).

Bearing, P/N 21-200010

Annular ball bearing, P/N 21-100016

(2 each)

Piston, P/N 320-0078

Helical compression spring,

P/N 31-100055

Piston insert, P/N 92-991005

Rotor, P/N 320-0080

Woodruff key, P/N 51-102010

Sleeve, P/N 320-0082

Lockvalve, P/N 400-0164

Preformed packing, P/N 11-106133

Ball bearing, P/N 21-300002

Preformed packing, P/N 11-106006

Preformed packing, P/N 11-106016

DISASSEMBLY

a. Hand Wheel.

(1) Remove machine bolt (25) and slide hand wheel (not shown) off straight shaft (27).

(2) Remove machine key (26) from slot in shaft. Keep the key for assembly.

b. Front Plate.

(1) Remove hexagon nuts (22) and capscrews (23).

(2) Separate front plate (31) from roll pins (2) and pump housing (3).

(3) Remove bearing (30), inner race bearing (29), and flat washer (24) from front plate.

4-16