Quantcast FUEL INJECTOR PIPES AND FUEL RETURN LINE

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ARMY TM 92815-252-24 AIR FORCE TO 38G1-92-2 Warning Keep body clear of test spray.   Fluid can be injected into blood-stream causing blood poisoning possible death. b. Open valve on fuel injector tester and operate lever at one stroke per second. c. Spray should start at 3480 psi (23,995 kPa) for used injector and 3552 to 3697 psi (24,491 to 25,491 kPa) for new injector and a well atomized spray pattern should be visible. d. Injector leakoff rate is 10 to 40 seconds between 2205 and 1470 psi (15,203 and 10,136 kPa). 3-17.4.   Installation. a. Remove all covers installed during removal. b. Ensure  seating in cylinder head  is clean and smooth. NOTE If  injector  sealing  washer  (9,  FIGURE  3-13)  has  been  used  more  than  once  it  will  become compressed and may adversely affect combustion. It is recommended that new injector sealing washers are installed on assembly.  Ensure that two washers are not installed to an injector. c. Lightly smear a very small amount of general purpose grease (630AA) to one side of new injector sealing washer (9).  Place one washer only over each injector nozzle greased side first. d. Install injector (8). e. Install clamp (7) and finger tighten bolt (6). f. Install a new preformed packing (2) into recess on cylinder head cover. g. Install injector pipe (3 or 4) and finger tighten nuts. h. Install cylinder head cover nut retaining injector pipe clip and tighten to 78 in-lbs (8.8 Nm). i. Tighten injector clamp bolt (6) to 186 in-lbs (21.0 Nm). j. Tighten injector pipe (3 or 4) nuts to 21.0 in-lbs (28.5 Nm). k. Install injector fuel return hose (5). 3-18. FUEL INJECTOR PIPES AND FUEL RETURN LINE. 3-18.1. Removal. a. Disconnect hose (10, FIGURE 3-13) from union (11). b. Remove union (11) and washer (12) from end of fuel supply hose. c. Disconnect hose (10) from tee fitting (13).   Remove tiedown straps (14) and remove hose (10).   Discard tiedown straps. d. Remove two hoses (5) from fuel injectors (8) and tee fittings (13). e. Remove tee fittings (13) from hose (15); remove hose (15). f. Disconnect hose (16) from tee fitting (13); remove hose (16). g. Loosen nuts on fuel injector pipes (3 and 4) at fuel injection pump and fuel injector (8). h. Remove  cylinder  head  cover  nuts  (1)  securing  fuel  injector  pipes  (3  and  4)  clips;  remove  pipes  (3  and  4).    If damaged, replace preformed packing (2). i. Cap all openings. Change 3 3-33


 


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