Section 1 - Cylinder Block - Group 01 Piston - Cleaning and Inspection for Reuse (1-20) M11 Page 1-59 Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam will cause serious personal injury. Caution: The gear must have all magnetism removed completely and cleaned thoroughly. The small metal par- ticles will cause engine damage. Remove all magnetism from the gear. Use solvent or steam to clean the gear and dry with compressed air. Piston - Cleaning and Inspection for Reuse (1-20) Piston Rings - Removal Use piston ring expander, Part No. ST-821, to remove the piston rings.
Place a tag on the rings and record the cylinder number of the piston on the tag. Cleaning Warning: When using a steam cleaner, wear protective clothing and safety glasses or a face shield. Hot steam will cause serious personal injury. Use steam to clean the carbon from the piston. NOTE: A plastic bead media, Part No. 3822735, has been released for cleaning the piston dome or crown and the ring grooves. Do not bead blast the piston skirt. Caution: The cleaning solvent must be approved for alu- minum to prevent damage to the pistons. Use a kerosene emulsion based solvent that can be heated to 95°C [200°F] and a cleaning tank that will constantly mix and filter the solvent. NOTE:
Do not use a solvent that has a pH higher than 9.5, or a solvent that contains chlorinated hydrocarbons with cresols, phenols, or cresylic components. Put the pistons into the solvent and allow them to soak for a minimum of 30 minutes. NOTE: Soak the pistons several hours or overnight for best results.