Engine Dynamometer - Install Engine (14-01) Section 14 - Engine Testing - Group 14 M11 Page 14-28 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. Fuel Drain Line Restriction mm Hg in Hg 89 MAX 3.5 Air Compressor NOTE:
All air compressors manufactured by Holset Y must be operating during the engine run-in. During the perfor- mance check, all air compressors must be in the unload or non-operating mode. Connect a source of compressed air capable of produc- ing 665 kPa [95 psi] to the air compressor unloader (1). This air line must contain a valve between the source and the unloader. NOTE: The compressed air load in the accompanying illus- tration must be attached to the air compressor outlet (2). Use an air tank (2). Install an air regulator (3) capable of maintaining 345 to 517 kPa [50 to 75 psi] air pressure at both minimum and maximum engine RPM. Install a steel tube or high temperature hose (1).
Hose Temperature (Minimum): 235°C [500°F]. Connect the tube or hose (1) to the air compressor outlet.