Replace/Repair Heat Exchanger and Heat Exchanger Group. (FIGURE 2-49)

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REPLACEMENT

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

FIGURE 2-49. Heat Exchanger Group

TM 55-1905-223-24-5

2-38. Replace/Repair Heat Exchanger and Heat Exchanger Group. (FIGURE 2-49)

This task covers:

a. Removal

b. Repair

c. Replacement

INITIAL SETUP:

Tools

Equipment Condition

Tool kit general mechanic's

External seawater inlet and outlet valves

rail and marine diesel engines

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

Cooling system drained (refer to

Combination wrench set,

PMCS, Item 30).

metric 10mm to 24mm,

Expansion tank removed (para. 2-36).

5720-01-046-4579

Engine tagged "Out of Service-Do Not

Torque wrench (30-300 ft-lb),

Operate."

5120-01-125-5190

Torque wrench (30-300 in-lb),

5120-01-092-3278

Materials/Parts

Nonmetallic hose P/N 67185 (2)

P/N 104296

Gaskets P/N 3008832 (2)

P/N 3055769 (2)

REMOVAL

a. Drain seawater cooling system at the seawater pump drain plug.

b. Disconnect hose clamps (24 and 26) and remove nonmetallic hose (25) from

engine water outlets (19 and 27).

c. Disconnect hose clamps (28, 30, 36 and 38) and remove nonmetallic hoses (29,

37) from metallic tube (35) and water inlet connection (31).

d. Disconnect hose clamp (17) and remove hose (18) from water outlet connection

(14).

e. Remove four hexhead capscrews (10) and lockwashers (9) securing water outlet

connection (8) and welded pipe (11) and remove outlet connection (8) and pipe

(11). Remove gasket (7) and discard.

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