[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR36.47]

[Page 176]
 
                       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 0.50.1 
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.
    (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.