Figure 3-37. Valve operating mechanism and camshaft.

1 Capscrew

13 Line assembly

2 Clip

14 Elbow

3 Shaft

15 Camshaft

4 Elbow

16 Key

5 Line assembly

17 Lockwasher

6 Rocker arm

18 Capscrew

7 Bracket

19 Gear

8 Rocker arm

20 Retainer

9 Washer

21 Thrust plate

10 Expansion plug

22 Valve lifter

11 Adjusting screw

23 Push rod

12 Elbow

Figure 3-37. Valve operating mechanism and camshaft.

(4) Remove capscrews (1) and washers (9)

clearance is greater than allowable limit, rocker arm

attaching rocker arm shaft brackets (7) to cylinder head,

must be replaced. Inspect machined ends (valve stem

and lift rocker arm assembly from cylinder head.

end) of rocker arms for signs of wear. If not excessively

(5) Remove elbow (12) and line assembly

worn, contact surfaces may be refaced on a valve lathe.

(13) from collar at center of rocker arm shaft.

(8) Inspect the rocker arm shaft for wear.

(6) Remove rocker arm brackets and collar

Remove expansion plugs (10), and clean oil holes with

from shaft.

cleaning solvent (Spec.

P-S-661), and dry with

(7) Inspect rocker arm bore for wear.

compressed air.

d. Rocker Arm Installation.

Specified clearance between shaft and bore is 0.001 to

0.0035 inch, and must not exceed 0.007 inch. If

3-46