TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM 9-2815-202-34 a. Disassembly NOTE Immediately after removing fuel lines, cover each injector opening with caps to keep out dirt. (1) ● ● Remove four inlet fuel lines (1) and four outlet fuel lines (2) from fuel injectors (3) and fuel connectors (4). Discard fuel lines. NOTE Tag rocker arms, shafts, brackets, valves, cam followers, and associated hardware so they can be installed in their original position. On model 7083-7395, one rocker arm shaft bracket on right cylinder head contains throttle delay housing (5). (2) Remove eight bolts (6) securing rocker arm shafts (7) and brackets (8) to cylinder head. NOTE Inspect throttle delay check valve for leakage. Fill throttle delay cylinder with fuel oil and watch check valve leakage while moving engine throttle from idle to full fuel position. If more than a drop of leakage occurs, replace check valve. (3) (4) (5) (6) (7) Remove four rocker arm shafts (7) and eight rocker shaft brackets (8) from cylinder head. If necessary, remove check valve (9) and oil supply fitting (10) from throttle delay housing (5) used on model 7083-7395. Swing rocker arms (11 ) away from injector and valves. Remove four injector clamp bolts (12), four washers (13), and four clamps (14). Remove four fuel injectors (4) from cylinder head. Loosen twelve locknuts (15) at upper end of push rods (16) next to rocker arm clevis. Unscrew twelve rocker arms (11 ) from push rods. Remove eight valve bridges (17) from bridge guides (18). 4-185