FIGURE 2-45. Manufactured Bow Areas in Rocker Covers

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Valve Adjustment

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

FIGURE 2-46. Engine Poppet Cover Torque Sequence

TM 55-1905-223-24-5

(j)

Repeat the process to correctly adjust all injectors, crossheads, and

valves.

NOTE

Stamped steel valve covers are designed and manufactured

with 0.030 inch (0.75mm) bow (see shaded areas, FIGURE 2-45)

to provide better sealing qualities. This built-in bow on

the valve covers must not be mistaken for warpage. Do not

attempt to increase or remove the bow from the sealing

surface.

FIGURE 2-45. Manufactured Bow Areas in Rocker Covers .

(k).

Install breather (3, FIGURE 2-36) on cover (5).

(l)

Install gaskets (6) and covers (5) on rocker lever housings (7).

(m)

Install assembled washer screws (4) in each cover (5).

(n)

Tighten each assembled washer screws (4) in the sequence shown (FIGURE

2-46) to 15 ft-lb torque.

(o)

Install engine lifting brackets (8) and four hexhead capscrews (9).

Torque cap screws to 60 ft-lb (80 N ).

(p)

Install nonmetallic hose (1) on breather (3) with hose clamp (2).

(q)

Replace upper fuel line check valve. Refer to paragraph 2-33.

(r)

Replace intake air crossover pipe. Refer to paragraph 2-39.

(s)

Replace instrument panel. Refer to paragraph 2-22.

2-127