Pyrometer

An optional pyrometer can be installed on the exhaust pipe. A pyrometer registers the exhaust temperature near the turbocharger. See Fig. . Maximum exhaust temperature for the Cummins ISB engine is 1290°F (700°C).

Variations in engine load can cause exhaust temperatures to vary. If the pyrometer reading shows that exhaust temperature exceeds normal, reduce fuel to the engine until the exhaust temperature is reduced. Shift to a lower gear if the engine is overloaded.