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SAFETY CHECKS AND PRECAUTIONS - TM-5-4210-230-14P-1_83
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SAFETY CHECKS AND PRECAUTIONS - TM-5-4210-230-14P-1_85
TM 5-4210-230-14&P-1 SAFETY CHECKS AND PRECAUTIONS COOLING CAUTION Misuse,  misapplication  or  modification  of  radiator  cooling  fans  can  result  in  serious  personal  injury  and property damage.  The following safety recommendations should be adhered to when servicing  radiator cooling fans. 1. Extreme  caution  must  be  exercised  when  working  on  vehicles  equipped  with  an  Automatic  Fan  Clutch.    The  fan  clutch  is controlled   by   a   temperature   control   switch   which   starts   the   fan   in   motion   only   after   the   engine   coolant   reaches   a predetermined temperature. Service  personnel  should  never  reach  or  permit  objects  to  come  within  the  radius  of  the  fan  blade  while  the  engine  is running, but the fan blade is not in motion. 2. Do not operate the engine with a fan which has been bent, mutilated, modified or in any way damaged. 3. Do not operate the engine if the fan makes physical contact or strikes against any other engine accessory while in operation. 4. Do not rebalance a fan. 5. Insure that all fan mounting bolts are installed at the specified torque. 6. Install fans such that the word "front" stamped on the fan hub faces toward the radiator. 7. Perform all required maintenance on the subassembly to which the fan is attached (i.e., water pump or fan drive, etc.). 8. Take special care not to make modifications which will increase the operating speed of the fan. 9. Do not install a fan on an engine for which the fan has not been approved.  Likewise, install a subassembly to which the fan is attached (water pump, fan drive, etc.) only if approved for use on the engine. 10. If  the  fan  contains  any  plastic  or  rubber  component,  have  the  fan  inspected  by  a  qualified  mechanic  after  exposure  to excessively high temperatures (above 250° F ambient temperature). 11. Replace the fan if there appear to be indications of excessive corrosion or erosion in the fan. ELECTRICAL Horn:  Occasionally blow the horn (air or electric) for satisfactory operation. Instruments:   Check operation of all instruments and gauges. Lights:  Be sure lights, regardless of type or where they are located, will illuminate at all times. Wiring:  Replace loose, weathered, cracked or broken wires to safeguard against breakdown on the road or possible shorts. EXHAUST SYSTEM Inspect  heat  shields  for  proper  installation  or  location.    Maintain  exhaust  system  (mufflers,  exhaust  pipes,  tail  pipes,  joints) integrity to assure no exhaust fumes can enter cab area. CAUTION Be  assured  that  no  fuel  lines,  brake  lines,  hoses  or  electrical  wiring  is  contacting  the  exhaust  system  as  this  can result in the following. FUEL LINES:  Personal injury or property damage is a high probability, should a fire occur due to fuel leakage being ignited by an external ignition source. BRAKE LINES:  A defective or ruptured brake line can allow a loss of braking ability to stop the vehicle; thus a vehicle crash could result with property damage or severe personal injury being incurred. HOSES:  Bodily harm from steam or hot water can result from broken heater or radiator hoses.  Also deteriorated steering gear hoses could result in property damage or personal injury should the vehicle crash due to loss of steering gear fluid. ELECTRICAL WIRING :  Shorts in the electrical wiring, such as the headlights, horn, electric windshield wipers, etc.  could result in a fire or stalled vehicle with resultant bodily injury. 3

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