In-cab gauges that will be checked during pre-trip inspection include all of these EXCEPT _________.

Cab Check/Engine Start:
- Oil Pressure Gauge:
+ Make sure oil pressure gauge is working.
+ Check that pressure gauge shows increasing or normal oil pressure or that the warning light goes off.
+ If equipped, oil temperature gauge should begin a gradual rise to the normal operating range.
- Temperature Gauge:
+ Make sure the temperature gauge is working.
+ Temperature should begin to climb to the normal operating range or temperature light should be off.
- Air Gauge:
+ Make sure the air gauge is working properly.
+ Build air pressure to governor cut-out, roughly 120-140 psi.