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Page Title: APU INJECTION PUMP
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TM 5-4210-233-14&P-1 5-78.  APU INJECTION PUMP This task covers: a. Removal c. Installation b. Adjust d. Follow-on Maintenance TOOLS REQUIRED EQUIPMENT CONDITION Tool Kit, General Mechanics, Automotive APU Removed (see para 4-207.) (Appendix B, Section III, Item 1) Gear Cover Removed (see 5-68.) MATERIALS/PARTS REQUIRED Lubricating Oil (Item 10, Appendix E) Oil Ring Seal (Figure 21 1, Appendix E) a. Removal. (1) Loosen screw and remove air housing panel. (2) Remove   four   capscrews,   four   flat   washers, plain housing panel, and nozzle housing panel. (3) Disconnect   governor   ball   joint   from   injection pump. (4) Tag and disconnect fuel hoses. (5) Tag   and   disconnect   fuel   line   (1)   from   fuel injection nozzle. (6) Cap all openings in pump, tines, and hoses. (7) Remove  two  capscrews  (2),  two  lockwashers (3), injection pump (4), O-ring seal (5), shim(s) (6), and valve tappet (7). b. Adjust. (1) Install  pump  tappet  (7)  in  recess  in  crankcase and  position  flywheel  on  the  port  closing  mark (PC) of the compression stroke. (2) Using     a     depth     micrometer,     measure     the distance  from  the  pump  mounting  pad  on  the crankcase to the center of tappet. (3) Determine     required     number     of     shims     by subtracting 1.670 in. (42.42 mm) from dimension obtained in step 2. (4) Select shims to achieve required thickness. 5-402

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