ARMY TM 9-6115-670-14&P
6-59
6.24. PISTON RINGS.
This task covers: a. Test
b. Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Piston Ring Expander
(Item 40, Appendix B)
Piston Compressor
(Item 41, Appendix B)
Equipment Conditions
Pistons removed from cylinder (para 6.22.).
Materials/Parts
Piston Rings
TEST
a. Remove piston ring from piston (perform step a of REPLACE).
b. Test piston ring gap.
(1)
Use piston compressor and piston to insert compression ring 1 into the least worn out part
of the cylinder.
(2)
Measure the ring gap.
(3)
If gap exceeds 0.0472 in. (1.2 mm), replace ring.
(4)
Perform step 1 with compression ring 2 and measure ring gap.
(5)
If gap exceeds 0.0472 in. (1.2 mm), replace ring.
NOTE
Ensure that piston rings are reinstalled on same piston
from which they were removed from (Figure 6-21,
Sheets 3 and 4).
