Section 14 - Engine Testing - Group 14 Engine Run-In Procedure - Engine Dynamometer (14-02) M11 Page 14-35 Open the throttle to obtain speed at which maximum horsepower is developed and adjust the dynamometer load to achieve 75 percent of fuel rate. Operate the engine at this speed and load level for 3 minutes. Check all gauges and record the data. NOTE: Do not proceed to the next step until blowby is stable within specifications. Move the throttle lever to its fully opened position, and increase the dynamometer load until 100 percent fuel flow is developed. Operate the engine at this condition and load level for 5 minutes, or until the blowby becomes stable within specifications.
Check all gauges and record the data. Increase the dynamometer load until the engine speed reduces to the engine’s torque peak RPM. Operate the engine at torque peak RPM for 7 minutes. Check all gauges and record the data. Reduce the dynamometer load until the engine speed increases to the engine’s maximum horsepower RPM. Operate the engine at maximum horsepower RPM for 5 minutes. Check all gauges and record the data. Compare the readings to the specifications listed earlier in this section.