LEVER 1715581 - Caterpillar

Motor Grader:
24H (PIN: 7KK)
Off-Highway Truck:
769D (PIN: 5SS; 5TR)
771D (PIN: 6JR)
773D (PIN: 7CS; 7ER)
775D (PIN: 6KR)
Track-Type Tractor:
D9R (PIN: 7TL; 8BL)
D10R (PIN: 3KR)
Wheel Loader:
988F (PIN: 2ZR)
Wheel Tractor:
631E (PIN: 1AB)
637E (PIN: 1FB)
Compactor:
834B (PIN: 7BR)
Wheel Tractor-Scraper:
633E (PIN: 2PS)
The Fuel-Air Ratio Control Adjust customer parameter is a new electronic feature that is used to enhance the electronic FARC. This feature maximizes engine response while achieving the desired smoke emissions levels. The FARC Adjust customer parameter allows the customer to provide a lean fuel mixture to the engine. This parameter affects engine performance during engine acceleration. This parameter also affects engines that work at high altitude conditions. Machines that are operating at a low altitude condition are not affected by the setting of this parameter.The Fuel-Air Ratio Control Adjust customer parameter can be set between 100 and 150. As the parameter value is increased, the amount of fuel injected decreases. This will effectively lean the fuel. The slight reduction in fueling during engine acceleration conditions can result in reduced smoke and cleaner exhaust emissions.A default parameter value of 100 has an internal adjustment coefficient of 1. This value is multiplied by the unadjusted FARC maximum fuel quantity that is normally delivered to the engine. This will not change the standard quantity of fuel that is being injected. A parameter greater than 100 will reduce the internal adjustment coefficient to a value of less than 1. This coefficient is multiplied by the unadjusted FARC maximum fuel quantity that is normally delivered to the engine. This leans the fuel mixture from the unadjusted maximum fuel quantity.There is a wide variation of operating conditions for the engine applications that contain this customer parameter. The proper setting of the FARC Adjust varies with the altitude and with the demand of the engine. Ensure that you always minimize engine smoke as much as your application demands will allow.