GEAR-SUN 1799006 - Caterpillar

(2YG, 7LG) Truck Engines;
3406B (8TC, 5YG, 2EK) (PEEC) Truck EnginesReference: Truck Engine News; November 1985; Page 3; "Engine Information Plate Contains More Data; Use Of Performance Specifications. "Full Load Setting (FLS) and Full Torque Setting (FTS) are used to fine-tune the performance curves of electronically governed engines. Instead of making adjustments with hand tools for settings, (as done on mechanically governed engines), FLS and FTS are adjusted by entering numbers into the Electronic Control Module (ECM). This is accomplished with an Electronic Control Analyzer Programmer (ECAP), as part of the System Configuration Parameters. The ECM then retains these numbers in memory indefinitely. They do not correspond to settings on a mechanical governor, nor do they cover as wide an adjustment range.
Every Caterpillar Engine is tested on a dynamometer prior to shipment. The engine's power output must fall within plus or minus three percent of a new engines specification. To keep power within these limits, the settings may be adjusted by programming new FLS and FTS numbers into the ECM. These new values are then stamped on the Engine Information Plate. Since these values were developed SPECIFICALLY for that particular engine, they are the BEST VALUES to use for that engine.
The FLS and FTS numbers should not be changed in an attempt to correct performance problems. Good troubleshooting methods should be used to find the real cause of the problem. Masking the real problem by making fuel system adjustments can cause high fuel consumption and can exceed design parameters for the engine. Do not overlook the basics when troubleshooting electronically controlled engines. Parameters such as fuel temperature, intake restrictions, drive train selection, etc., can affect performance just as on a mechanically governed engine.
The only acceptable reasons for programming FLS and FTS values other than those on the engine information plate are:
1. A change in the horsepower family. For example: 350 hp to 400 hp. This usually will include a major engine component change, such as fuel injectors, pistons, or turbocharger. In this example, a new 4W5140 Engine Information Plate should be installed over the original plate.2. A change in emissions certification. For example: 49-state to 50-state emissions. Again, a new 4W5140 Engine Information Plate should be installed over the original plate.3. If the engine information plate is lost, mutilated, or destroyed. Minor changes, such as going from a 310 standard to a 310 multi-torque, or changing ratings within a family, (1800 rpm to 1700 rpm) DO NOT require changing the FLS and FTS.To install a new 4W5140 Engine Information Plate:
1. Thoroughly clean the surface of the original plate.2. Stamp the new information and the unchanged information on the new plate. Straighten the plate if necessary.3. Pull off the protective back and break off the lower section of the plate at the scribed mark.4. Use 8T9021 Adhesive to provide a permanent bond between the former identification plate and the new 4W5140 Engine Information Plate. Carefully follow instructions for the adhesive. If the adhesive is premixed, it will NOT bond correctly.5.