[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: 30CFR36.27]

[Page 173]
 
                       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 B--Construction and Design Requirements
 
Sec. 36.27  Fuel-supply system.

    (a) Fuel tank. (1) The fuel tank shall not leak and shall be 
fabricated of metal at least \1/16\ inch thick, welded at all seams, 
except that tanks of 5 gallons or less capacity may have thinner walls 
which shall be preformed or reinforced to provide good resistance to 
deflection. A drain plug (not a valve or petcock) shall be provided and 
locked in position. A vent opening shall be provided in the fuel filler 
cap of such design that atmospheric pressure is maintained inside the 
tank. The size of the vent opening shall be restricted to prevent fuel 
from splashing through it. The filler opening shall be so arranged that 
fuel can be added only through a self-closing valve at least 1 foot from 
the exhaust manifold of the engine, preferably below it. The self-
closing valve shall constitute a fuel-tight closure when fuel is not 
being added. Any part of the self-closing valve that might become 
detached during the addition of fuel shall be secured to the tank by a 
chain or other fastening to prevent loss.
    (2) The fuel tank shall have a definite position in the equipment 
assembly, and no provision shall be made for attachment of separate or 
auxiliary fuel tanks.
    (3) Capacity of the fuel tank shall not exceed the amount of fuel 
necessary to operate the engine continuously at full load for 
approximately four hours.
    (b) Fuel lines. All fuel lines shall be installed to protect them 
against damage in ordinary use and they shall be designed, fabricated, 
and secured to resist breakage from vibration.
    (c) Valve in fuel line. A shutoff valve shall be provided in the 
fuel system, installed in a manner acceptable to MSHA.
    Note: This shutoff valve is in addition to the normal shutoff 
provided in the fuel-injection system and also in addition to the air-
shutoff valve.