TM 9-4310-397-14
(g)
Measure cylinder liner as directed in step (h) and compare with piston measurement. Piston Skirt
Diameter Specifications.
1
Dimension (B) bottom of skirt 0.74 in. (19 mm) from bottom of piston.
2
Dimension (A) 4.188 - 4.189 in. (106.38 - 106.40 mm).
(h)
Measure piston to liner clearance.
1
Put piston in matched liner with piston "front" and liner "front" aligned. Move piston down until
bottom edge of piston skirt is 1.00 in. (25.4 mm) (C, Figure 6-83) above bottom of liner. Use a
feeler gauge to measure distance (d)between piston skirt and liner 90° to piston pin bore. Record the
measured distance (D). Piston to liner clearance (measured at bottom of piston skirt) 0.003 - 0.005
in. (0.08-0.14 mm).
Figure 6-83. Piston Clearance
2 Turn piston 90° in liner. Use a feeler gauge to measure distance between piston skirt and liner 90° to
piston pin bore. Record the measured distance. The difference between the two measurements
steps (1) and (2) is the distance the liner is out of round at the bottom of the liner.
3 Pull piston out of liner. Put piston in liner upside down with piston "front" and liner "front" aligned.
Move piston so bottom edge of piston skirt is 1.00 in. (25.4 mm) (E, Figure 6-84) below top of liner.
Figure 6-84. Piston Clearance
6-67
