TM 10-4610-310-14
0121 00
PISTON RINGS - continued
2. Measure the dimensions according to Table 1.
Table 1. Piston Rings Measurements
1st Ring
2nd Ring
Oil Ring
Measurement
T
h
T
h
T
h
Service Limit
2.77 mm
1.36 mm
2.77 mm
1.36 mm
1.90 mm
3.36 mm
(0.109 inch)
(0.054 inch)
(0.109 inch)
(0.054 inch)
(0.075 inch)
(0.132 inch)
4. Replace the piston ring if any of the measurements are less than the service limit.
5. Insert a serviceable piston ring into the piston ring groove
6. Measure the piston ring side clearance according to Figure 4 and Table 2. Replace the piston if the
clearance exceeds the service limit.
Figure 4. Piston Ring and Groove Clearance Measurement.
Table 2. Piston Ring Groove Clearance
1ST Ring
Groove Clearance
0.15 mm (0.006 inch)
Service Limit
Groove Clearance
0.15 mm (0.006 inch)
2nd Ring
Service Limit
Groove Clearance
0.15 mm (0.006 inch)
Oil Ring
Service Limit
