TM 5-3810-207-20/TO 36C23-3-37-12 Probable cause Possible remedy Faulty water pump Replace water pump (pars. 101 and 258). Thermostat defective Replace defective thermo- stat (pars.  98 and 259). Hose leaks Tighten clamps.  Replace defective hose (pars.  96 and 257). Loose or open drain Inspect and tighten. plugs. Replace defective drain plug. Fan belt loose Tighten fan belt (TM 5- 3810-207-10). 28.  Excessive Block Smoke From Exhausts Probable cause Possible remedy Faulty carburetor Replace carburetor (pars. 106 and 246). Air cleaner clogged Clean air cleaner.  Replace a faulty air cleaner (pars.  107 and 244). Excessive oil in Drain oil and fill crank- crankcase. case (LO 5-3810-207- 20). 29.  Engine Temperature Fails to Rise Probable cause Possible remedy Thermostat defective Replace defective thermo- stat (pars.  98 and 259). Shutter open Close shutter. Defective Replace temperature gage temperature gage. (pars.  79 and 218). 30.  Engine Starts But Will Not Run Probable cause Possible remedy Low compression Adjust valve clearance (pars.  92 and 266). Defective carburetor Replace carburetor (pars. 106 and 246). Air intake clogged Remove obstructions (pars.  107 and 244). Defective fuel pump Replace fuel pump (pars. 108 and 247). Defective Replace distributor points distributor points. (pars.  75 and 201). 31.  Engine Clutches Slip Probable cause Possible remedy Incorrect adjustment Adjust clutch (TM 5-3810- 207-10). Control linkage loose Adjust control linkage or out of adjustment. (pars.  118 and 268). 32.  Engine Clutches Will Not Engage Probable cause Possible remedy Incorrect adjustment Adjust clutch (TM 5-3810- 207-10). Probable cause Possible remedy Control linkage out of Adjust control linkage adjustment. (pars.  118 and 268). 33.      Engine   Clutches   Slip   or   Will   Not   Engage Properly Probable cause Possible remedy Incorrect clutch Adjust clutches (TM 5- adjustment. 3810-207-10). Control linkage loose Tighten or adjust control or out of adjustment. linkage (pars.  118 and 268). Clutch pedal and cross- Replace a damaged clutch shaft defective. pedal and cross-shaft (par.  269). 34.  Carrier Engine Clutch Slips Probable cause Possible remedy Improper pedal Adjust to provide free adjustment. pedal travel of 1 to 1-1/2 inches (TM 5- 3810-207-10). Clutch out of Adjust clutch (TM 5-3810- adjustment. 207-10). 35.  Fuel Consumption Excessive Probable cause Possible remedy Fuel tanks and lines Replace fuel tank.  Report leak or are defective. to field maintenance. Replace fuel lines (pars. 110 and 250). Carburetor faulty or Adjust or replace car- out of adjustment. buretor (pars.  106 and 246). Faulty fuel pumps Replace fuel pumps (pars. 108 and 247). 36.  Lights Fail Probable cause Possible remedy Defective or burned Replace lamps (TM 5 out lamps. 6810-207-10). Short in wiring Replace wiring (pars.  89 and 227). Defective switch Replace switch (pars.  79 and 219). Loose wiring Tighten connections (pars. connectings. 79, 219, 237, and 238). 37.  Lights Dim Probable cause Possible remedy Lenses dirty or Clean lenses (pars.  86 tarnished. and 231). Loose wiring Check wiring. 21