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 TM 5-1940-277-20
TM 1940-20/2
3-128.1 ENGINE VALVE TAPPETS INSTRUCTIONS MK2 W/CUMMINS
TOOLS: 7/16 inch Socket
15/16 inch Box Wrench
Feeler Gage Set
PARTS/MATERIALS: Rocker Cover Gasket
WARNING
Engine Stop Control must be pulled out to prevent accidental
engine starting during tappet adjustment or personal injury may
result.
REMOVE:
1.
Open engine hatches (refer to paragraph 3-154).
2.
Remove reservoir (refer to paragraph 3-72).
3.
Remove beltguard (refer to paragraph 3-119.1).
4.
Remove valve covers (refer to paragraph 3-125).
2
1
~
3
4
7
5
7
6
5.
Remove plug (1) from flywheel housing (2). Using ratchet, slowly rotate flywheel with gear barring
tool (3), until locating pin (4) engages in camshaft gear (5). This is Top Dead Center (TDC) position.
6.
Remove locating pin (4) from camshaft gear (5).
7.
Mark engine crankshaft (6) and front cover (7).
3-274
Change 2
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