ARMY  TM  9-2805-262-14 AIR  FORCE  TO  38G2-90-1 NAVY  NAVFAC  P-8-613-14E H - Hours Item No. 1 2 3 4 5 6 7 Paragraph Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS). Interv D l _s_ l l l l l — H — 5 — D – Daily Item   Inspected Spark Plug High Tension  Cables Breaker  Points Fuel Filter Crankcase  Ventilation  System Air Cleaner Crankcase  Oil S – Semiannually  (500 Hours) Procedure Clean, inspect,  and regap  (para.  4-28). Inspect  and test (para. 4-27). Inspect,  adjust breaker  points  (para.  4-49). Service  fuel filter (para. 4-13). Inspect breather box and breather tube (para. 4-40). Service air cleaner daily in extreme heat or dusty or sandy conditions  (para. 4–14). Drain and refill  crankcase  oil and service oil filter in  extreme  heat  or  dusty  or  sandy  conditions. Refer to LO 9–2805–262–12. Section  IV.  UNIT  TROUBLESHOOTING Page 4-9 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3 4-10 Unit Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3 4-9. General.  This section contains troubleshooting  procedures  to determine  the probable  cause of observed equipment  malfunctions.  Tests or inspections  are provided  to isolate the faulty component and corrective  actions are provided  to eliminate the malfunction. 4-10. Unit Troubleshooting Procedures. Refer to the symptom index to locate the troubleshooting procedure  for the observed  malfunction.  The table lists  the common malfunctions  that may occur during the operation or maintenance of the engine. Perform the tests of inspections,  and the recommended corrective  action in the order listed in the troubleshooting table. If the malfunction  is corrected  by a specific  correction action, do not oontinue  with the remaining  steps, if any, of the troubleshooting procedure.  If the malfunction is not correoted by the listed corrective  aotions notify your supervisor,  and/or  direct support  (DS) maintenance. 4-3