TM 3-1040-276-10
b. Cleaning/Inspect/Repair.
a. Inspect parts (1 thru 7) for dirt or carbon deposits and clean with rags (item 6, app D) soaked in dry cleaning
solvent (item 1, app D). Soak parts with hard carbon deposits in dry cleaning solvent. Rub and wipe with dry
rag.
b. Inspect machine bolt (1) and backstop washer (2) for corrosion. Inspect machine bolt for stripped threads. If
any damage, discard and replace with spares.
c. Inspect engine valve backstop (3) for burred or worn index and corrosion. Remove corrosion with rag
(item 6, app D) and fog oil. If badly damaged, discard and replace with spare.
d. Inspect engine valve (4) for broken, frayed, bent, or corroded petals; cracked or deformed indexing slots;
and burrs on smooth side. If damaged, discard and replace with spares. If corroded, clean engine valve
using lapping board as described in step 3.
a. Inspect engine head (5) for wear, burrs on
indexing slot (8), clogged ports (9), and carbon
deposits on valve seating face (10).
b. If ports are clogged, wipe ports with twisted
comer of rag soaked with dry cleaning sol-
vent. Remove carbon deposits on valve seat-
ing face as described in step 3.
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