[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: 30CFR36.44]

[Page 175]
 
                       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. 36.44  Maximum allowable fuel : air ratio.

    (a) When an engine is delivered to MSHA with the fuel-injection 
system adjusted by the applicant and tests of the exhaust-gas 
composition (see Sec. 36.43) show not more than 0.30 percent, by volume, 
of carbon monoxide, the applicant's adjustment of the fuel-injection 
system shall be accepted. The maximum fuel : air ratio determined from 
the exhaust-gas composition shall be designated as the maximum allowable 
fuel : air ratio. The maximum liquid fuel rate (pounds per hour) that 
produces the maximum allowable fuel : air ratio shall be designated as 
the maximum allowable fuel rate for operating the equipment at 
elevations not exceeding 1,000 feet above sea level.
    (b) When the carbon monoxide content of the exhaust exceeds 0.30 
percent, by volume, only near maximum power output, the maximum fuel : 
air ratio at which carbon monoxide does not exceed 0.30 percent shall be 
calculated and designated as the maximum allowable fuel : air ratio. The 
corresponding calculated liquid fuel rate shall be designated as the 
maximum allowable fuel rate at elevations not exceeding 1,000 feet above 
sea level.
    Note: The applicant may be requested to adjust the liquid fuel rate 
during tests to determine the maximum allowable fuel : air ratio.
    (c) The maximum allowable fuel : air ratio and maximum liquid fuel 
rates shall be used to calculate a liquid fuel rate-altitude table that 
shall govern the liquid fuel rate of engines operated at elevations 
exceeding 1,000 feet above sea level.