TM 5-4310-379-14
4-21. Valve Operating Mechanism (Cont).
(11)
Inspect pallets (12) on rocker arm (5) for excessive wear. The pallets may be refaced up to a maximum
depth of .010 in. (.0254 cm). Be careful not to overheat the rocker arm (5) when surface grinding.
(12)
Inspect cam follower (13). Measure outside diameter of cam follower (13). Measurement should be
1.0600-1.061 0 in. (2.6924-2.6949 cm). Measure the total clearance between roller bushing and pin.
Clearance should be less than .0100 in. (.0254 cm). Replace a cam follower that is worn or otherwise
damaged.
(13)
Inspect retainer (6) and replace if cracked, bent or otherwise damaged.
(14)
Inspect brackets (2) and replace if cracked or otherwise damaged.
(15)
Inspect push rod housing retainers (14) and replace if worn or otherwise damaged.
(16)
Inspect push rod housing (15) and replace if dented, cracked or otherwise damaged.
(17)
Inspect seats (8) and replace if worn or otherwise damaged.
(18)
Lubricate rocker arm bushings (11) with clean engine oil.
(19)
Install seats (8), springs (7), retainers (6), on upper push rods (4).
(20)
Install rocker arms (5) on shaft (3).
(21)
Install retainer (6) on upper push rods (4).
(22)
Install upper push rods (4) in rocker arms (5) and screw upper push rods (4) in fully.
(23)
Install brackets (2) on shaft (3) and install two bolts (1).
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