TM 5-2420-230-24-2
Valve Tappets - Inspection (4-01)
Section 4 - Tappets and Push Rods - Group 04
Page 4-4
B Series Shop Manual
Valve Tappets - Inspection (4-01)
Inspect the socket, stem and face for excessive wear,
cracks and other damage.
Visual Limits
(A) - Normal Contact
(B) and (C) - Irregular Contact: Do not reuse.
Pit marks on the tappet face are acceptable.
The following criteria definds the size of the pits allowed.
1. A single pit can not be greater than 2 mm [0.079 in].
2. Interconnection of pits is not allowed.
3. Total pits when added together should not exceed 6
mm [0.236 inch] diameter or a total of 4 percent of the
tappet face.
4. No pitting is allowable on the edges of the wear face
of the tappet.
Measure the valve tappet stem.
Diameter
mm
in
15.936
MIN
[0.627]
15.977
MAX
[0.629]
Push Rods - Inspection (4-02)
Clean the push rods in hot soapy water.
L-297