TM 9--2815--247--34 0069 00--2 PISTONS, RINGS, AND ASSOCIATED PARTS REPAIR -- CONTINUED 0069 00 Disassembly -- Continued 7.   Remove oil control piston ring expander (11) from piston (10) by separating at parting line of expander spring. Figure 8 11 10 8.   Remove retaining rings (12) and piston pin (13). 9.   Mark piston pin (13) for identification showing piston (10) number. Cleaning WARNING Use goggles, rubber gloves, and rubber apron when cleaning parts in carbon--removing compound. Provide adequate ventilation. Avoid inhalation of fumes and skin contact. If compound is splashed on skin, flush with fresh water and wash with alcohol. Alcohol containing 2 to 3 percent camphor is preferable. 1.   Clean pistons (10), piston pins (13), retaining rings (12), and rings (1, 2, 3, and 4) by soaking in carbon--removing compound. Figure 8 12 12 13 10 4 3 2 1