Warm up the engine (emissions change for cold and warm engines)

Park the machine into an intake entry with vehicle facing the mine rib

Set brakes and chock the wheels

Sample exhaust emissions before any after treatment devices, i.e., before catalytic converter, particulate trap, fume diluters, and water scrubber

Make sure no personnel are in front or behind the machine

Set transmission gear

Full throttle to induce converter stall for about 60 seconds

Sample allowing reading to stabilize and record measurement

Release throttle and shift transmission out of gear

Allow torque converter to cool for a few minutes

Repeat the test using the same method every week for comparable results

Sampling with CO measurement device at idle, prior to torque stall, will allow for quicker sampling and shorter stall tests

Using a tachometer to verify the engine speed at load will help weekly repeatability

Check for changes in CO concentration against the baseline you have established for the engine

Increases in CO concentration level above the established baseline indicates problems

Contact MSHA Technical Support for guidance on engine CO information

Maintain records to track engine performance

A chart of individual equipment emissions plotted over time (weekly)

A logbook separated into individual equipment for easy weekly comparison

A logbook separated into similar engines