[Code of Federal Regulations]

[Title 30, Volume 1]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 30CFR36.47]



[Page 187-188]

 

                       TITLE 30--MINERAL RESOURCES

 

  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

 

PART 36_APPROVAL REQUIREMENTS FOR PERMISSIBLE MOBILE DIESEL-POWERED 

TRANSPORTATION EQUIPMENT--Table of Contents

 

                       Subpart C_Test Requirements

 

Sec.  36.47  Tests of exhaust-gas cooling system.



    (a) The adequacy of the exhaust-gas cooling system and its 

components shall be determined with the engine operating at the maximum 

allowable liquid fuel rate and governed speed with 0.5 0.1 percent, by volume, of natural gas in the intake air 

mixture. All parts of the engine and exhaust-gas cooling system shall be 

at their respective equilibrium temperatures. The cooling spray, if any, 

shall be operated, and all compartments designed to hold cooling water 

shall be filled with the quantity of water recommended by the applicant. 

No cooling air shall be circulated over the engine or components in the 

cooling system during the test.

    (b) Determinations shall be made during the test to establish the 

cooling performance of the system, the cooling water consumption, high-

water level when the system sprays excess water, and low-water level 

when the cooling system fails.

    (c) The final exhaust-gas temperature at discharge from the cooling 

system, and before the exhaust gas is diluted with air, shall not exceed 

170 [deg]F. or the temperature of adiabatic saturation, if this 

temperature is lower.

    (d) Water consumed in cooling the exhaust gas under the test 

conditions shall not exceed by more than 15 percent that required for 

adiabatic saturation of the exhaust-gas at the final temperature. Water 

in excess of that required for adiabatic saturation shall be considered 

as entrained water. Enough water shall be available in the cooling 

system or in reserve supply compartments for sustained satisfactory 

operation for at least 2\2/3\ hours under the test conditions.

    Note: This amount is enough to cool the exhaust for an 8-hour shift 

at one-third load factor.

    (e) The adequacy of the automatic fuel shutoff actuated by the 

temperature of the final exhaust shall be determined with the engine 

operating under test conditions by withdrawing water until the cooling 

system fails to function. The final exhaust-gas temperature at which the 

liquid fuel to the engine is automatically shut off shall be noted. This 

temperaure shall not exceed 185 [deg]F.

    (f) Following the automatic fuel shutoff test in paragraph (e) of 

this section, the temperature of the control point shall be allowed to 

fall to 170 [deg]F. At this temperature and with the water replenished 

in the cooling system, it shall be possible to start the engine.

    Note: If the cooling system includes a reserve supply water tank, 

the line or lines connecting it to the cooling compartment may require a 

suitable flame arrester.



[[Page 188]]



    (g) The effectiveness of the automatic engine shut-off, which will 

operate when the water in the cooling jacket(s) exceeds 212 [deg]F., 

shall be determined by causing the jacket temperature to exceed 212 

[deg]F.