TM 5-3825-230-14&P
5-19. PISTON ASSEMBLY REPLACEMENT.
This task covers:
a. Removal
b. Cleaning/Inspection
c. Installation
INITIAL SETUP
Tools
Equipment Condition
Tool Kit, Master Mechanic's
TM or Para
Condition Description
Para 5-9
Engine cylinder removed.
Shop Equipment, Machine Shop, Field
Maintenance, Basic, Less Power
Materials/Parts
Oil, engine, item 26 Appendix E
a.Removal
(1)
Remove and discard piston rings (1, 2, and 3).
(2)
Remove two retaining rings (4) using retaining
ring pliers and remove wrist pin (5) using a
press.
(3)
Remove piston (6) from connecting rod (7).
b.Cleaning/inspection.
(1) Inspect pistons for scratches, cracks and scoring.
Replace if visually damaged.
(2)
Measure pistons for wear using calipers.
Replace piston if diameter is not within 3.
to 3.3866 in. (86.00 to 86.02 mm).
5-39
