TM    10-3930-638-24&P 12-14.   ENGINE   MAINTENANCE   (cont) d.  Intake  ManfoId  (cont). STEP LOCATION ITEM ACTION REMARKS CLEANING (cont) 4 Intake  manifold Use wire brush remove all rust, carbon, and Clean oxidized  material.  Ensure  that  all  traces of  gasket  material  are  removed. CAUTION When removing gasket (15) ensure that gasket material does not fall into cylinder head ports. Damage to en- gine may result from foreign material falling into ports. Cylinder  head Clean Mating surface and studs with cleaning sol- 5 vent P-D-680. Remove all traces of gasket material. INSPECTION 6 Intake  manifold Inspect Replace if cracked or damaged. (14) 7 Adapter (9) Inspect Replace if internal threads are damaged. 8 Cylinder  head Inspect If studs are broken or have damaged studs threads  notify  direct  support  mainte- nance WARNING If NBC exposure is suspected, all air filter media should be handled by personnel wearing protective equipment. Consult your unit NBC Officer or NBC NCO for appropriate handling or disposal proce- dures. 9 Air cleaner hose Inspect Replace if cracked or worn (5) 10 All other parts Inspect Replace if cracked or worn INSTALLATION/REPLACEMENT 11 Cylinder  head a. Gasket (15) Install b. intake mani- Position fold  (14) 2-34   Change   5

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