30 CFR § 36.48 Tests of surface temperature of engine and components of the cooling system. (a) The surface temperatures of the engine, exhaust cooling system,
and other components subject to heating by engine operation shall be
determined with the engine operated as prescribed by MSHA. All parts of the
engine, cooling system, and other components shall have reached their
respective equilibrium temperatures. The exhaust cooling system shall be
operated, but air shall not be circulated over the engine or components.
Surface temperatures shall be measured at various places prescribed by MSHA
to determine where maximum temperatures develop. (b) The temperature of any surface shall not exceed 400° F.
Note to § 36.48: The engine may be operated under test
conditions prescribed by MSHA while completely surrounded by a
flammable mixture. MSHA reserves the right to apply combustible
materials to any surface for test. Operation under such conditions
shall not ignite the flammable mixture.
[Sched. 31, 26 FR 645, Jan. 24, 1961, as amended at 61 FR 55526, Oct. 25, 1996]