IIENGINE HARD TO STARTDo steps A through F.IAUXILIARY POWER UNITENGINE HARD TO START IN COLD WEATHERDo steps E through F.ABcDEFNOTEInstall winterization kit in extremely cold weather conditions,0° to -65° F.Open fuel falter drain cocks to remove water and contaminants from falters.Check for dirty or clogged fuel filters. Replace fuel falter elements if dirty(p 13-16).Inspect for leaking APU fuel lines and fittings. Tighten or replace defectivelies or fittings (p 13-25 thru 13-29).Check for dirty air cleaner filter element. Clean or replace falter element (TM9-2350-267-10).Disconnect lead R to glow plugs and preheater (p 6-133). Measure continuityfrom preheat relay terminal to glowplugs and preheater. Meter should indicateO ohms. If not, replace or repair lead R from relay terminal to glow plugs andpreheater. If circuit R shows continuity, disconnect lead R from glow plug andmeasure resistance from each glow plug terminal to ground. The meter shouldindicate 4.75 ± 1.5 ohms for each glow plug. If not, applicable glow plug isdefective; notify Support Maintenance. If it does, go to step F.Measure resistance from preheater plug terminal to preheat terminal. The metershould indicate 0.6 ± 0.05 ohms. If it does not, replace appropriate defectivepreheater plug.2-261Change 4TM 9-2350-267-20
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