ARMY TM 9-6115-670-14&P 4-84 c.  Remove fitting (16) from fuel intake hole (6). d.  Route hand siphon through fuel intake hole (6) into fuel day tank (4) and route other end of line into an overflow container. e.  Siphon fuel out of fuel day tank (4). f.   Disconnect connector J7 (14) from connector P7 (14). g.  Remove fuel lines from fuel day tank (4) assembly.  Proceed as follows: (1)  Loosen clamp (22) and remove return line (23) to vehicle. (2)  Loosen clamp (11) and remove overflow line (10) from fuel injectors. (3)  Loosen clamp (8) and remove line (9) to fuel filter. h.  Remove four bolts and washers (5). i.    Lift fuel day tank (4) so that sump in bottom of fuel day tank clears frame assembly and remove fuel day tank (4). j.    Remove three fittings (7, 12, and 21) from fuel day tank (4). k.  Remove fuel level switches (13) from fuel day tank (4). l.    Clean old sealing compound from all fittings (7) (2, 17 and 21). m. Immerse fuel day tank (4) in approved solvent for two minutes and drain. n.  Rinse solvent until all sediment has been removed. o.  Let sit until dry (one hour). p.  Apply sealing compound to threads of fittings (7, 12, 17, and 21) and install in fuel day tank. q.  Apply sealing compound to threads of fuel level switches (13) and install. r.   Slide fuel day tank (4) between engine and frame and align mounting holes with in the frame assembly. s.  Secure fuel day tank to frame with four bolts and flat washers (5). t.   Install fuel lines on fuel day tank.  Proceed as follows: (1) Connect line to fuel filter (9) to fitting (7), and secure with clamp (8). (2) Connect line from transfer pump (19) to fitting (17), and secure with clamp (18). (3) Connect overflow line (10) from fuel line injectors to fitting (12) and secure to clamp (11). (4) Connect return line to vehicle (23) and secure to fitting (21), with clamp (22). u.  Reconnect connector J7 (14) to connector P7 (15).