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TM 5-4210-230-14&P-1 SAFETY CHECKS AND PRECAUTIONS FRAME Because International chassis are manufactured with frame rails of either cold rolled steel, heat-treated steel or aluminum alloy, each must be handled in a specific manner to assure maximum service life. Specific instructions are published, concerning proper repair of frame rails and can be obtained from your nearest Dealer. FUEL SYSTEM Frequently check throttle linkage for proper operation. Inspect condition of fuel tanks, fuel lines, clips and routing. LPG Safety  precautions  in  the  handling  of  butane-propane  cannot  be  over-emphasized.    There  are  state,  county  or  city  laws, ordinance, and fire regulations covering the utility ordinance, and fire regulations on this subject must be adhered to in addition to the safety rules given below. Where local rules are more stringent than  those given below, the local rules are to be given priority. These rules apply to servicing any vehicle or engine using liquefied petroleum gas (butane-propane) for engine fuel regardless of the nature of the work to be performed. 1. Select a location for servicing this vehicle where there will be good air circulation.  This is to avoid accumulation of gas-air mixtures in and about the vehicle caused by undetected leaks. 2. Such location should be as far as possible from steam cleaners, hot water cleaner, hot dip tanks, etc., and any other device operating with open flame. 3. Shut off the main valves at the fuel tanks and allow the motor to run.  This is to exhaust all fuel in the system from the tank to the engine.  In the event the vehicle is disabled and the engine is inoperative, shut the valve at the tank.  Bleed the fuel system of propane gas outside of the building before towing the unit into the shop. 4. "DANGER" signs should be placed on either side of the vehicle.  There is to be no smoking in the vicinity.  No work is to be performed on this vehicle or no others in a nearby zone involving open flames such as cutting or welding, grinding, chiseling, or any similar operation which may produce sparks. 5. In  order  to  avoid  possible  accumulations  of  explosive  gas-air  mixtures,  these  vehicles,  whenever  possible,  should  be removed from the shop at the end of the working day. 6. A fire extinguisher (dry powder or carbon dioxide) should be removed from its regular location and placed adjacent to the mechanic's working area-handy for immediate use.  When LPG ignites, it should be allowed to burn until, if possible, the source of fuel is shut off.  Extinguishing the fire before this is accomplished, can result in dangerous accumulations of gas which might cause a more serious flash or explosion. 7. After completing service work and before starting the engine, raise the hood to allow air to circulate around the engine to remove any possible gas accumulation. 8. Never use LPG from the fuel tanks on these vehicles for cleaning parts, blowing of horns, inflating tires, cleaning out the cab or other uses for which it is not intended and by which it is out of control. This   is   mentioned   because   inspections   have   revealed   that   operators   have   used   it   as   a   substitute   for   solvents   and compressed air, not realizing the extreme danger of this practice. 9. Whenever the nature of service work requires any operation on the fuel system, the following should be observed. a. All threaded connections should be treated with an insoluble lubricant.  (permatex or aviation gasket maker.) Replace worn or defective fittings. b. After connecting up the fuel system check it for leaks.  NO LEAKS ARE PERMISIBLE.  Odorants which are strong smelling compounds (a smell similar to spoiled cabbage) are added LP-Gas, as warning agents, to indicate leakage of even small quantities of gas. c. A lather of soap brushed on with a soft brush will indicate the presence of leaks which are dangerous and wasteful. Never use open flame to check for leakage. 3

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