MAC TOOLS MW250 Instruções de Operação descarregar pdf (Página 291)

100

101

TM 5-4310-452-14

5-7. CYLINDER HEAD MAINTENANCE (Con't ).

c. ASSEMBLY

1. Cool valve guides (15) and valve seats (10 and 13)

to -80°F (-62°C).

2. Install valve guides (15), longer end first, from the

top of cylinder head (8).

3. Install 2 new valve seats (10 and 13) in cylinder

head (8). Remove cylinder head from cylinder head

stand.

4. Install stud (14) and 3 studs (5) in cylinder head (8).

5. Position intake valve (12) in place in cylinder head

(8). Install retaining ring (16).

6. Install rotor (17), spring (18), gasket (19), and spring

retainer (1) in place on cylinder head (8).

7. Press down on spring retainer (1) and install valve

cone halves (2).

8. Repeat steps 5 through 7, and install exhaust valve

(11) in cylinder head (8).

d. INSTALLATION

1. Position spacer ring (9) and cylinder head (8) in place on cylinder.

2. Install 4 capscrews (6) and washers (7) in cylinder head (8) and tighten diagonally.

3. Install 2 screw plugs (4) and washers (3) in cylinder head (8). Tighten screw plugs to 58-65 lb.-ft. (80-90 N•m).

4. Install valve train mechanism (see paragraph 5-13).

5. Install valve cover (see paragraph 4-12).

TA505566

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MAC TOOLS MW250 Instruções de Operação Página 291

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