Assembly - TM-9-2815-200-350368

faces. Discard valves having badly pitted,

scored, scratched stems or locking grooves.

(b) Reface slightly pitted or burned

valves that do not seat perfectly to limits

specified in figure 6-63. Discard valves that

cannot be refaced to these limits.

( c ) Check valve length from seat contact

to tip of stem after grinding, as shown in figure 6-

6 3 . Discard valve if length is not within limits

specified (fig. 6-63).

(2) V a l v e s p r i n g s . R e p l a c e s p r i n g s ( 1 6 , 1 7 ,

and 18) when worn, cracked, or otherwise

d a m aged. Replace springs that do not conform

t o limits specified in overhaul standards (table 6-

15).

(3) Valve spring retainers, valve rotors, and

valve locks. (Refer to fig. B-4)

(a) Replace upper intake and exhaust

valve spring retainers (19 and 38) and valve

spring seat (15) when cracked or worn.

( b ) Replace valve rotors (40) when inner

section does not rotate freely or when assembly is

worn or cracked.

1. Position the valve lifter assembly - 5120-678-5285

or cracked.

over the valve springs and retainers (A) and secure in

6 - 3 4 . Assembly

position with four 5 / 16 x 1-3/8 bolts and 5 / 16-in.

flat washers.

a. Cylinders. (Refer to fig. B-4)

2. Compress valve springs and retainers with screws (B)

(1) Install intake valve (12) and exhaust

and install two valve locks (20) in the groove of each

v a l v e (11) in their respective guides in cylinder

valve stem. Release valve spring compression. Remove

(41). Hold valves in position and place the

valve lifter assembly - 5120-678-5285 from cylinder

c y l i n d e r on valve removing and inserting stand -

and remove cylinder from stand.

4910-554-1317 following instructions which

Figure 6-65. Co repressing valve springs

accompany figure 6-65.

using valve lifter assembly-5120-678-5285.

(2) Install the exhaust valve rotor (40),

outer, intermediate, and inner springs (16, 17,

a n d 18), and upper exhaust valve spring retainer

(38) over the exhaust valve stem as shown in

f i g u r e 6-49. Install the lower intake valve spring

seat (15), outer, intermediate, and inner springs

( 1 6 , 17, and 18), and upper intake valve spring

retainer (19) over the intake valve stem in the

same manner. Compress valve springs and

install valve locks following instructions which

accompany figure 6-65.

b. Valve Rocker Arm Covers. Refer to

paragraph 4-14.

6-74