GEAR (58 teeth) 7N5496 - Caterpillar

REM06-43
Reman
December 2006 IMPROVED 10R0946 3516B HD ENGINE ARRANGEMENT NOW AVAILABLE FOR 793B MINING TRUCKSAnnouncement Cat Reman announces an improvement to the 10R0946 3516B HD engine for 793B Off-Highway Trucks. The improved arrangement includes the faster spinning 793D turbos and different software designed to improve engine performance. The changes will help to eliminate engine derates that were triggered by excessive exhaust temperatures within certain RPM ranges. In the validation testing conducted, the new turbo and software modifications have significantly reduced exhaust temperatures and have delivered a 50% quicker acceleration to torque converter stall. Overall improvements in cycle times were measured as the new turbo and software modifications improved acceleration away from the shovel. The engine remains a 2160 hp replacement for the original 3516 and is based on the 793C HD platform with the exception of the turbos. The retrofit package incorporates the original engine oil coolers and auxiliary gear group to enable installation without requiring significant changes to chassis or hydraulics.Though offering benefits as shown in the table below, the new arrangement does require a reduction in the altitude capability of the HD engine from 12,000 ft to 10,000 ft to keep turbo speeds within design limits. Also, the fuel consumption as measured in the lab has increased from where it was with the original turbo but is still about 4% better than the original 793B standard stroke engine. Fuel consumption is also very dependent on application and payloads and some sites have reported improvements in fuel consumption from the original design.
Features Benefits
New Turbos & Software
50% quicker acceleration to torque converter stall
Improved Cycle Times
High Displacement Engine
4% Improved fuel consumption
Approximately 12% longer life
Extended Repair & Maintenance Intervals
Lower Repair & Maintenance costs
Lower cost/ton
3516 HD Continues to Deliver Lower Operating Cost-Per-Ton The 3516B HD engine combustion system provides fuel efficiency improvements for 793B users. On a full load comparison of Brake Specific Fuel Consumption (BSFC), BSFC is reduced from 218 to 209, an improvement of just over 4% over the short stroke engine. Lower BSFC contributes to longer engine life. Elimination of the turbocharger wastegate and series turbocharging also contributes to reduced fuel consumption, lower maintenance costs, and extended engine life. The new design increases engine displacement by 13%, which lowers Brake Mean Effective Pressure (BMEP), effectively reducing thermal, pressure, and vibration stresses on the engine. Lower BMEP is critical to extended component life and longer overall engine life.Recommended oil and oil filter change intervals have been extended from 250 to 500 hours. The 3516B HD engine provides the option for Oil Renewal System (ORS).The following chart illustrates the engine life a customer can expect with a 3516B HD engine in relation to the life they previously experienced with both the 3516 standard stroke and the original 3516B HD engine under a given load factor. On the average, because of the improvements made with the 3516B HD, about 50,000 more gallons of fuel can be burned over the life of the engine thus equating