CAP AS 9J6001 - Caterpillar

Specifications
Table 1
Specifications
Parameter Value
Desired NOx Setting 61 ppm - 0.5g
140 ppm - 1.0g
Minimum High Idle Speed 925 rpm
Maximum High Idle Speed 1200 to 1400 rpm
Supply Pressure to Gas Pressure Regulator 221 to 241 kPa (32 to 35 psi)
Gas Pressure to Metering Valve 17.2 to 20.7 kPa (2.5 - 3.0 psi)
Full Load Throttle Angle 60 to 65%
75% Load Throttle Angle 50 to 55%
50% Load Throttle Angle 40 to 45%
Fuel Correction Factor (FCF) 100% 5%
Turbo Speed Sensor 12 to 15 N m (8.9 to 11 lb ft) Introduction
This Test and Adjust Procedure covers the initial setup of G3500B Engines. Before performing any of this procedure, read and understand all of the information below.The air/fuel ratio must be adjusted properly in order to comply with the emissions requirements of the site. The correct air/fuel ratio also helps ensure stable operation. To adjust the air/fuel ratio.Required Tools
Table 2
Required Tools
Qty Part No.
1 317-7484 Communication Adapter Gp
1 PC (Personal Computer)
1 Emissions Analyzer capable of measuring NO and NO2 separately. For engines above 610 m (2000 ft) use the following tools:
146-4080 Digital Multimeter Gp
343-3320 Speed Sensor
344-2650 Wiring Harness
Illustration 1 g01397982
(1) 370-4617 CA3/PC Cable As
(2) 317-7485 Communication Adapter
(3) 327-8981 CA3/data Link Cable As
(4) NETG5057Test Preparation
Note: An emissions analyzer that measures NO and NO2 separately must be used to check and to adjust the air/fuel ratio control. The accuracy of the emissions analyzer must be within 10 percent of a standard at the desired engine NOX emissions level. Calibrate the emissions analyzer for both NO and NO2 as needed in order to maintain this accuracy level.A complete fuel analysis must be conducted prior to putting the engine into service. Obtain a fuel analysis in order to determine the fuel energy content and calculate the methane number. The methane number indicates the ability of the fuel to be ignited. The methane number is determined when you input the data from the fuel analysis into the Methane Number Program, LERW4485. Use the methane number and the Engine Performance, "Fuel Usage Guide" in order to determine the ignition timing.Fuel Analysis
Obtain current fuel analysis.
Use the methane number to determine desired timing for engine setup.
Enter the "First Desired Timing" in the appropriate blank in the "Configuration" screen in ET.
Input the "Low Heat Value (LHV)" into the appropriate blank in the "Configuration" screen.
Input the "Specific Gravity (SG)" into the appropriate blank in the "Configuration" screen.
Input the "Specific Heat Ratio (SHR)" into the appropriate blank in the "Configuration" screen.
Input the "Air/Fuel Ratio Proportional Gain" and "Integral Gain"to zero in the appropriate blank in the "Configuration" screen.Desired NOx
Input the "Desired NOx" value into the appropriate blank in the "Configuration" screen.
Select "Emissions Feedback Mode Configuration" to "NOx Feedback".Adjustment Procedure - Engine Speed Settings
Select "Engine Speed Parameters" in the "Configuration" tab using ET.
Set the governor control to "Isochronous" and zero droop.
Set the "Manimum High Idle" to 925 rpm or higher.
Set the "Maximum High Idle" to 1400 rpm.
Set "Governor Gain (Proportional)" to 100.
Set the "Governor Stability (Integral)" to 100.
The "Governor Compensation (Derivative)"