MAC TOOLS MW250 Betriebsanleitung PDF herunterladen (Seite 304)

100

101

TM 5-4310-452-14

5-13. VALVE TRAIN MECHANISM MAINTENANCE.

This Task Covers:

a. Removal c. Assembly

b. Disassembly d. Installation

Initial Setup:

Equipment Conditions: Materials/Parts:

• Engine off. • Two lockwashers

•· Left and right door assemblies open. • Two preformed packings

• Battery cables disconnected (see paragraph 4-57).

Tools/Test Equipment:

• General mechanic's tool kit

a. REMOVAL

NOTE

Use this task to remove any 1 of 4

valve train mechanisms. No. 1 valve

train location is shown.

1. Remove valve cover (see paragraph 4-12).

2. Remove 3 nuts (7) from rocker arm bracket (8) and

cylinder head studs (16).

3. Remove rocker arm bracket (8) from cylinder head

(15).

b. DISASSEMBLY

1. Remove 2 nuts (24), lockwashers (23), and washers

(22) from rocker arm bracket (8). Discard

lockwashers.

2. Remove 2 rocker arms (4) and shafts (5) from

rocker arm bracket (8).

3. Inspect 2 studs (6) in rocker arm bracket (8) for

cracks, bends, or stripped threads. Replace studs if

necessary.

4. Remove 2 bushings (21) from rocker arms (4).

5. Remove 2 nuts (3), adjusting screws (19), and thrust

pads (20) from rocker arms (4).

6. Remove 2 nuts (2) and oil nozzles (1) from rocker

arms (4).

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