Replace/Repair Cylinder Head Group. (FIGURE 2-53)

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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 2-53. Cylinder Head Group

TM 55-1905-223-24-5

2-41. Replace/Repair Cylinder Head Group. (FIGURE 2-53)

This task covers:

a. Removal

b. Repair

c. Replacement

INITIAL SETUP:

Tools

Equipment Condition

Tool kit, general mechanic's

Cooling system drained (refer to

rail and marine diesel engines,

PMCS, Item 30).

Air crossover connection and turbocharger

Combination wrench set,

metric 10mm to 24mm,

Rocker lever housing/cover group

5120-01-046-4979

Torque wrench kit P/N 3377216

Intake manifold removed (para. 2-39).

Exhaust manifold removed (para. 2-40).

Materials/Parts

Injectors removed (para. 2-34).

Preformed packing P/N 131026

Head gaskets P/N 3047402

Wood blocks (for laying the heads

on when they are removed), Item 7, Appendix C

Lubricating oil, 15W-40, Item 30, Appendix C

REMOVAL

a. Remove bolts (2) holding fuel crossover connections (1).

b. Remove fuel crossover connections (1).

c. Remove preformed packing (7) and discard.

CAUTION

Do not damage capscrews.

NOTE

Capscrews should be removed in opposite sequence

of installation. (See FIGURE 2-54)

d. Remove capscrews (3) and washers (4).

e. Remove cylinder head (5).

f. Remove head gasket (6) and discard.

2-146