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TM 5-4320-305-24
4-6. REPAIR CYLINDER HEAD ASSEMBLY AND ROCKER ARMS (Continued)
6
Replace bearing bushings (4), rocker arms (1), or rocker brackets (2) if extremely worn or damaged.
7
Replace rocker arms (1) or bushings (4) if clearance to rocker fulcrum (3) is too great.
8
Replace thrust pads (6) if they are galled or worn.
9
Replace rocker arms (1), oil nozzle (7), or bearing bushing (4) if oil passage is permanently blocked.
10 Open clogged oil hole (4) in tappet (1) with small wire. Repair only minor nicks or burrs in tappet head (2) or seat (3)
if possible. Major damage such as dents or warpage, excessive wear, or permanently restricted oil hole will require
replacement. Replace as necessary.
NOTE
Before installing repaired or new cylinder head, piston top clearance should be
measured and checked. Use the test and adjustment procedures described in
paragraph 3-19.
4-45
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