Chassis Dynamometer (14-03) Section 14 - Engine Testing - Group 14 M11 Page 14-42 Operate the engine at maximum horsepower RPM and Advertised Horsepower. Observe the reading on the gauge. NOTE: The maximum fuel inlet restriction is as follows: Fuel Inlet Restriction (plus ECM Cooling Plate) mm Hg in Hg Clean Filter 152 MAX 6 Dirty Filter 254 MAX 10 Correct the restriction or replace the fuel filter. Fuel Drain Line Restriction Use Pressure Gauge, Part No. ST-1273, to measure fuel drain line restriction. NOTE: Do not measure fuel drain line restriction with the fuel measuring device installed. This will not measure the drain line restriction of the vehicle’s return plumbing.
Hold the gauge at the same level as the connection. NOTE: The gauge will not measure the correct pressure if the gauge is not held at the same level as the connection. Operate the engine at maximum horsepower RPM and Advertised Horsepower. Observe the reading on the gauge. Fuel Drain Line Restriction mm Hg in Hg 89 MAX 3.5