A
B
C
D
TM 9-4940-568-34
7-57
(4)
Pit marks on the tappet face are acceptable.
(5)
The following criteria defines the size of the
pits allowed.
(a)
A single pit cannot be greater than
0.078 in. (2 mm).
(b)
Interconnection of pits is not allowed.
(c)
Total pits when added together should
not exceed 0.236 in. (6 mm) diameter
or a total of 4 percent of the tappet
face.
(d)
No pitting is allowable on the edges
of the wear face of the tappet.
(6)
Measure the valve tappet stem.
in.
mm
0.627
MIN.
(15.936)
0.629
MAX.
(15.977)
(7)
Inspect the fuel transfer pump lobe, valve
lobes and bearing journals for cracking,
pitting or scoring.
(8)
Inspect the camshaft gear teeth for pitting;
look for cracks at the root of the teeth.
