SECTION V. INTERMEDIATE DIRECT SUPPORT MAINTENANCE PROCEDURES

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TM-55-1905-223-24-5 Bowthruster Engine for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

FIGURE 3-1. Bowthruster Engine

TM 55-1905-223-24-5

SECTION V. INTERMEDIATE DIRECT SUPPORT MAINTENANCE PROCEDURES

3-12. General. This section contains direct support maintenance procedures for the NT 855M Bowthruster

Diesel Engine. Step-by-step actions are provided with illustrations when applicable.

MAINTENANCE OF BOWTHRUSTER ENGINE

3-13. Replace Bowthruster Engine Assembly. (FIGURE 3-1)

This task covers:

a. Removal

b. Replacement

INITIAL SETUP:

Tools

Equipment Condition

Tool kit, general mechanic's,

Engine shut down

rail and marine diesel engines,

(TM 55-1905-223-24-10).

5180-00-629-9783

Primary circuit breakers OFF

Combination wrench set,

(TM 55-1905-223-10).

metric 10mm to 24mm,

Cooling system and lubricating oil

5120-01-046-4979

drained (Table 2-1).

Engine lifting fixture P/N 3822512

Bowthruster Waterjet coupling removed

Filter wrench P/N 3375049, 3376807

(TM 55-1905-223-24-6).

Torque wrench kit P/N 3377216

Fire pump coupling removed

(TM 55-1905-223-24-12).

Materials/Parts

Electric starter motor disconnected

(para. 2-21).

Engine assembly, NT 855-M

Instrument panel disconnected,

(para. 2-22).

All external fuel, seawater valves

closed (TM 55-1905-223-24-18).

Seawater pump drained and disconnected

(para. 2-37).

Fuel pump connections removed

(para. 2-33).

Fuel filter connections removed and

drained (para. 2-27).

Coolant heater disconnected

(para. 2-32).

Exhaust piping disconnected

(para. 2-40).

Fuel supply lines disconnected

(para. 2-33).

Lubrication oil drain line disconnected

(para. 2-31).

Seawater inlet valves disconnected

(para. 2-37).

Seawater outlet valves disconnected

(TM 55-1905-223-24-18).

Change 1 3-7