TM 10-3930-669-20 NOTE One injector line shown installed; all four are installed the same way. (8) Install fuel return pipe (11), nipple (6), two fuel return pipes (9 and 10) on injectors (12) with washers (8) and banjo screw (7). (6) Install     fuel     pipe     assembly     (17)     on injection    pump    (15)    and    tighten    four fittings (16). (7) Install fuel return pipe (10), two washers (14),  and  relief  valve  (13)  on  injection pump (15). 4-15