Replace Alternating Current Motor - TM-55-1905-223-24-120059

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Repair Centrifugal Pump Unit.

TM-55-1905-223-24-12 Fire Pump System for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

FIGURE 3-4. Alternating Current Motor Replacement.

TM 55-1905-223-24-12

3-16. Replace Alternating Current Motor. (FIGURE 3-4)

This task covers: a. Removal, b. Replacement.

INITIAL SETUP

Tools

Equipment Condition

Tool kit, general mechanic's,

TM 55-1905-223-10, electric power to

pump motor unit disconnected, tagged

Dial Indicator P/N 5210-00-277-8840

"Out of Service, Do not Operate."

Lifting sling P/N 3375957

Suction and discharge valves locked

Torque wrench (30-300 inch-pound)

and tagged in "Closed" position.

Torque wrench (30-300 foot-pound)

General Safety Instructions

Disconnect power. Use the lifting sling.

Materials/Parts

Motor assembly P/N 284JP

Stuffing box cover preformed packing

P/N 62148-2-914-0

Lubricating sealant, Item 6, Appendix C

Out of service tags, Item 13, Appendix C

REMOVAL

WARNING

Electrical components contain high voltages that can

cause severe injury or death. Before servicing,

adjusting, or replacing electrical or mechanical

components, the power supply to the electric motor

must be disconnected.

a. From electric motor conduit box (1), remove cover machine bolts (2), cover,

and cover gasket. Disconnect and tag electrical cables from electric motor

then reinstall cover on conduit box.

b. Open discharge gauge tap (6), remove drain plug (8) at bottom of casing,

and drain pump. Install plug.

Remove motor foundation hexagon nuts (12), machine bolts (10), and flat

washers (11).

d. Using the lifting sling, rig motor, adapter, and pump rotating

assembly for removal.

3-17