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 TM 5-2420-224-34
ROCKER
ARMS,
PUSH
RODS,
AND
TAPPETS
REPLACEMENT
(CONT)
Check tappet face for excessive wear and nonperpendicularity to sides. Maximum deviation is 0.012 in.
5.
(0.03 mm). See table below.
NOTE
Replace tappets if worn or maximum nonperpendicularity is exceeded. Slight pit
marks on tappet face are not cause for replacement, except if pitting is on the edge.
Always install new tappets if new camshaft has been installed.
Measure clearance between tappet and engine block bore. Allowable clearance is 0.0004-0.0020 in.
6.
(0.010-0.053 mm). If clearance is less than 0.0004 in. (0.010 mm), enlarge engine block bore. If
clearance is greater than 0.0020 in. (0.053 mm), reject engine block.
INSTALLATION
1.
INSTALL 12 TAPPETS (1).
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