TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download

TM 281 22" Table -S. Trbleshooting Procedures - Co+tittued Malfunction Probable cause Cooling System Deficiencies- Continued 13. Abnormal Oil nditions 13.1 Low oil pressure-temperature normal: 13.2 Low oil pressure with: a. Normal oil temperature and light"OFF". b. High oil temperature and waing light"ON". c High oil temperature and warning light "OFF". 13.3 High oil temperature th: a. Normal oil pressure and warning llght"OFF". b. Normal oil pressure and normal oil temperature. 13.4 Low oil level: (below "add" mark) 13.6 High oil level: (overfull) 2·16 Change 1 b. Restcted cooling air inlets (blked �th debris). c. Oil level overfull. d. Seasonal grade of oil improper (tꝏ heavy) for ambient temperature. e. Cooling fan clutch slipping, fan drive failed or blades eroded. f. Cooling shroud, baffle, deflector or plates loose, cracked or broken. g. Oil cooler thermostatic valve anor bypass valve defective. h. Engine over-powered due to improper fuel adjustment. i. Engine operation under full load for extended peods at high ambient temperatures (desert) under heaY load conditions(sand, mud, hills). a. Low oil level. b. Seasonal grade of oil improper (oil too light) for ambient tempera- ture. c. Oil diluted with fuel. d. Pressure sending unit or gage defective. e. Oil pressure regulator valve malfunction. f. Defective oil pump or obstructed oil pickup screen. g. Crankshaft bearing wo or damaged. a. Oil pressure gage or transmitter defec- tive. b. Engine overheating. c Warning light bued out. a. Oil temperature gage or trans- mitter defective. a. Warning light switch defective. a. Vehicle not on level ground during oil level check. b. "Oil check" service neglected. c. Loss of oil due to oil leak. d. High oil consumption. a. Overfilled by error. b. Oil diluted with fuel. Corrective action b. Clean air inlets and glles. c Refer lo item 13.5. d. Check oil in engine. Drain and refill with proper grade of oil. Refer to pertinent Vehicle Lubrication Order. e. Check fan rotation and clutch torque, and inspect fan blades. Hepair as required (para 3-Z and 3-95). f. Inspect and repair as required. g. •nemo1•e valves and replacc(r>nra 2-37 and 2-35). hl. Check engine power. Refer to items 19.1and19.2 h2. •Replace fuel injection pump (pnra 2-21). i. Limit operation to short periods when operating under such conditions. a. Refer to item 13.4 b. Check oil in engine. Drain and refill with proper grade of oil. Refer to pertinent lubrication order. c Refer to item 13.6 d l. Check electrically. Refer to pertinent vehicle technical manual. d2. Repair or replace as required. e. • tnsפct for sticky or defective valve. Repair or replace as required (para 2-33). f. •Remove oil pump and inspect pump and screen. Repair or replace as required (para 3-74). g l . Check for damage. Refer to item 20. g2. •If deposits are found in filter, disassemble engine, clean and repair as required. a. Check electrically. Refer to pertinent vehicle technical manual. Replace as required. b. Refer to item 12.1 c Replace bulb. Refer to pertinent vehicle technical manual. a. Check electrically. Refer to pertinent vehicle technical manual. Replace  required. al. Check electrically. Refer to pertinent vehicle technical manual. Replace  required. a. sition vehicle on level ground and recheck oil level. b. Add oil to proper level. c. Inspect for leaks. Repair as required. d. Refer to item 13.7. a. Drain to proper level. b. Refer to item13.6.