Section 14 - Engine Testing - Group 14 Engine Run-In Procedure - Without Dynamometer (14-05) M11 Page 14-49 Caution: Do not shut off the engine immediately after the run-in is completed. Allow the engine to cool by operating it at 700 to 900 RPM for a minimum of 3 to 5 minutes to avoid internal component damages. This al- lows the turbocharger and other components to cool. Shut off the engine. Make sure all instrumentation is removed before remov- ing the vehicle from the chassis dynamometer. Engine Run-In Procedure - Without Dynamometer (14-05) On-Highway Caution:
Refer to ‘‘Engine Testing - General Informa- tion’’ and ‘‘Engine Testing - Specifications’’ at the front of this section before operating the engine to avoid in- ternal component damage. Operate the vehicle pulling heaviest available trailer al- lowed for the first 80 to 160 km [50 to 100 miles] after rebuild. Operate vehicle in highest gear possible within the normal operating RPM range of the engine. It is nec- essary to operate the engine at or near full throttle at 75 percent to 85 percent of maximum horsepower RPM in- dicated on the data plate. Do not idle the engine for more than 5 minutes at any one time during the first 160 km [100 miles] of operation.