TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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(3) (4) (5) (6) (7) (8) (9) (10) (11) (12) TM9-2815-202-34 Injector body Inspect injector body (21) threads, bushing seating surface, and fuel connector gasket sealing surfaces for damage. Inspect rack hole, body seal ring sealing surface, clamp radius, and dowel pin. Replace if necessary. Fuel connectors Check condition of jumper line sealing surfaces, copper gasket sealing surfaces, and fuel connector (3) threads. Replace if necessary. Control rack (a) Check injector control rack (24) for straightness, rack teeth for damage, and notch in clevis for wear. Check rack for nicks, burrs, rust, and hardness. (b) Notch in clevis should be 0.3125 to 0.3145 inch. Gear and gear retainer Inspect gear (23) and gear retainer (22) for nicks, burrs, or rust. Check gear teeth for wear. Bushing Check bushing lapped sealing surface for scratches and bushing internal diameter for scoring. Observe condition of dowel pin. Check for corrosion and varnish. Replace if necessary. Plunger Check plunger (9) for corrosion or varnish, scoring, scratching or wear, and chips along edge of helix. Check valve and check valve cage (a) Inspect for cracks and scratches on lapped surfaces. Also inspect for corrosion, varnish, and wear. (b) Measure thickness of check valve (18) and check thickness is 0.163 inch and minimum check valve Valve spring Check valve spring (16) for wear on coil ends, broken valve cage (17). Minimum cage thickness is 0.022 inch. coil ends, and notches under coil ends. Check for corrosion, nicks, and erosion on inside at armroximatety 1 1/2 coils from end. Replace if necessary. Spring seat Check spring seat (15) surfaces for wear. Replace if necessary. Spring cage (a) Inspect spring gage (14) for cracks, corrosion or varnish, and scratches on lapped sealing surfaces. Inspect spring set surface and needle valve seating surface for wear. (b) Measure thickness of spring cage. Minimum thickness is 0.602 inch. 4-227