FASTENER GP-OIL PUMP MOUNTING 4N2481 - Caterpillar

Lower Repair & Maintenance costs
Lower cost/ton Evolution for Improved Performance - 3516B HD Engine Changes The 3516B HD (sometimes referred to as the "Long Stroke") has been standard in all 793C low altitude mining trucks since October, 2000. Improved performance of the HD engine is achieved by increasing displacement by approximately 13 % (78 liters in the 3516B HD vs. 69 liters in the short stroke 3516B). This increased displacement has been accomplished through lengthening piston stroke by 25.4 mm (12.7 mm on each throw) and making associated changes to the crankshaft, connecting rods, pistons, turbochargers and control software. The increase in stroke adds about one half of a liter of displacement per cylinder. The connecting rods are longer and feature a more robust piston pin end that adds durability to the design. The new pistons are shorter, but feature the same two-piece design proven in other 3500B engines. A steel crown with an aluminum skirt assures the best combination of high strength and low weight. To optimize the performance of the 3516B HD engine, a new turbocharger arrangement was also developed. This new, more efficient turbocharger arrangement features four identical single stage turbochargers providing improved fuel to air mixtures and a more efficient fuel burn. The 3516B HD design eliminates both the wastegate and the series turbocharging design of previous 3516 engines in the 793B. This simpler design offers improved serviceability and lower operating costs. This upgraded engine comes with special software that allows it to work with existing machine control modules. The 3516B HD engine requires installation of VIMS monitoring system which uses the latest 9.62 version of VIMS configurations. The 3516B HD is capable of operating at altitudes up to 3700m (12,000 ft.) without performance deration. For high altitude sites where fuel economy is a top priority the 3516B HD will provide fuel efficiency with a derate of 0.8% per kpa (390ft) of altitude starting at 3700m (12,000 ft.). 3516B HD Delivers Lower Operating Cost-Per-Ton 3516B HD Engine Operation
The 3516B HD engine combustion system provides real fuel efficiency improvements for 793B users. On a full load comparison Brake Specific Fuel Consumption (BSFC) is reduced from 218 to 199, an improvement of approximately 9 % 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