TM-9-2815-205-24 Technical Manual for M113 Engine 6V53 6V53T Download
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INSPECTION-ACCEPTANCE AND REJECTION CRITERIA - Continued 8. Plunger inspection procedures: Check plunger (Figure 7, Item 2) for erosion, corrosion or varnish, scoring, scratching or wear, and chips along edge of helix. 2 2 2 ADVANCED STAGE OF EROSION CAUSED BY FOREIGN MATERIAL IN FUEL DUE TO IMPROPER FILTRATION. CHIPPED AT LOWER HELIX. THIS CONDITION CAN BE CAUSED BY EITHER LACK OF FUEL AT HIGH SPEEDS OR WATER IN FUEL. MAINT_281 Figure 7. Injector Plunger Check. 9. Check valve and check valve cage inspection procedures: a. Inspect for cracks and scratches on lapped surfaces. Also inspect for corrosion, varnish, and wear. b. Measure thickness of check valve and check valve cage. Minimum cage thickness is 0.163 inch (4.14 mm) and minimum check valve thickness is 0.022 inch (0.56 mm). Replace if necessary. 10. Valve spring inspection procedures: Check spring for wear on coil ends, broken coil ends, and notches under coil ends. Check for corrosion, nicks, and cavitation erosion on inside at approximately 1-1/2 coils from end. Replace if necessary. 11. Spring seat inspection procedures: Check surfaces for wear as shown by visible chamfer. Replace if necessary. 12. Spring cage inspection procedures: a. Inspect for cracks, corrosion or varnish, and scratches on lapped sealing surfaces. Inspect spring seat surface and needle valve seating surface for wear. b. Measure thickness of spring cage. Minimum thickness is 0.602 inch (15.29 mm). Replace if necessary. 13. Spray tip: a. Check for cracks, enlarged spray holes, corrosion on outside diameter taper, and oxide scale on spray hole end. Check nut to tip sealing surface and lapped sealing surface for scratches. Do not use spray tip if there are scale, cracks, or enlarged spray holes. b. Measure thickness of spray tip (Figure 8, Item 5) shoulder. Minimum thickness is 0.199 inch (5.05 mm). TM 9-2815-205-24 0084 0084-8