TM 9-4310-397-14
(8)
Check push rods (Figure 6-26, 1) for straightness by rolling on a flat surface.
Figure 6-26. Inspect Push Rods
(9)
Replace defective push rods.
(10)
Inspect valve springs.
(a). Inspect valve springs for alignment, wear and damage.
(b). Put springs on a flat surface to see that they are square and parallel.
(c). Check valve spring tension using spring compression tester (item 13, section III, appendix B) and the
specifications given for the valve spring.
NOTE
Free length of springs differ slightly, but compressed height must be the same.
Valve Spring Specifications
Compression
Height
54-62 lb force (240-276 N). ..............................................
1.81 in. (46 mm)
133-153 lb force (591-680N) ............................................
1.36 in. (34.5 mm)
(11)
Inspect and measure valves.
(a)
Visually inspect valves to determine if they can be restored to a serviceable condition. Replace valves
that are burned, cracked, eroded, or chipped.
6-27
