TM 10-3930-669-34 2-11. ENGINE SYSTEM TROUBLESHOOTING (CONT). 4. EXCESSIVE BLACK OR GREY SMOKE. INITIAL SETUP Tools and Special Tools Materials/Parts Tool Kit, General Mechanic’s: Automotive Cap and Plug Set (Item 5, Appendix B) (Item 1, Appendix E) Tag, Identification (Item 21, Appendix B) Pressure Test Kit (Item 5, Appendix E) STE/ICE-R (Optional) (Item 14, Appendix E) References Gauge, Tester, Injection Pump TM 10-3930-669-10 (Item 5, Appendix E) TM 10-3930-669-20 Retainer (Item 13, Appendix E) Equipment Condition Personnel Required Engine OFF (TM 10-3930-669-10) Two MAIN POWER switch OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) KNOWN INFO TEST OPTIONS Nothing. Injection pump pressure test. POSSIBLE PROBLEMS REASON FOR QUESTION Injection pump faulty. If injection pump is faulty, Injection pump timing incorrect. engine will exhaust black or  4 Low engine compression. grey smoke excessively. Valves or valve springs faulty. Piston ring(s) faulty. 2-38 Page 2-39. (Para 4-5).

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