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TM 5-2420-222-34
3-4.
ENGINE BLOCK MAINTENANCE (Con’t).
7.
Remove three studs (4) from engine block (1).
8.
Remove side plug (8) from engine block (1).
9.
Remove four fluid restrictors (11) from engine block (1).
10. Remove pipe plug (10) from engine block (1).
CAUTION
Do not remove pins unless damaged. Removal may damage parts.
11. Remove two pins (9) from engine block (1).
b.
CLEANING AND INSPECTION
WARNING
Avoid contact with live steam. Live steam can burn skin, cause
blindness, and cause other serious Injury. Be sure to wear protective
apron, gloves, and safety goggles when using live steam.
1. Using steam cleaner, clean all internal passages and external holes and recesses of engine block free of corrosion,
scaling, and foreign matter.
WARNING
Compressed air used for cleaning or drying purposes, or for clearing
restrictions, should never exceed 30 psi (207 kPa). Wear protective
clothing (goggles/shield, gloves, etc.) and use caution to avoid Injury to
personnel.
2.
Turn engine block so deposits will run out. Flush internal passages and external holes and recesses with clean water.
Dry engine block with compressed air.
WARNING
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear
protective goggles and gloves, and use only in a well-ventilated area.
Avoid contact with skin, eyes, and clothes, and DO NOT breathe vapors.
DO NOT use near open flame or excessive heat. The solvent’s flash point
is 100°F-138°F (38°C-59°C). If you become dizzy while using cleaning
solvent, immediately get fresh air and medical help. If solvent contacts
eyes, Immediately wash your eyes and get medical aid.
3.
Remove all gasket material from gasket surfaces, then wipe clean with dry cleaning solvent and rags.
4.
Clean all other metal parts with dry cleaning solvent, then dry with rags.
5.
Clean four fluid restrictors with dry cleaning solvent. Clear oil passages with nonelectrical wire. Wipe dry.
3-24
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