ARMY TM 9-6115-670-14&P
6-76
6.30. CYLINDER.
This task covers: a. Test
b. Adjust
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Cylinder Gage
(Item 39, Appendix B)
Boring Tool Bar
(Item 49, Appendix B)
Cylinder Hone Stone and Holder
(Item 45, Appendix B)
Equipment Conditions
Crankshaft removed from crankcase (para 6.26.).
Materials/Parts
None.
TEST
a. Refer to Figure 6-27 and use cylinder gage to measure cylinder ID at the following depths:
(1)
0.394 in. (10 mm)
(2)
1.771 in. (45 mm)
(3)
3.740 in. (90 mm)
b. Cylinder ID should be between 2.63779 and 2.63854 in. (67.000 and 67.019 mm).
c. From the six measurements, determine the maximum wear by calculating the difference
between the largest and smallest ID.
d. If maximum wear is greater than 0.0059 in. (0.15 mm), adjust the cylinder.
NOTE
At each depth, measure cylinder ID in two different
directions: parallel to the piston pin and perpendicular to
the piston pin.
