【文章內(nèi)容簡介】 it is injected into the cylinder. Fuel pressure is created hydraulically in response to a signal from the ADEM III? Electronic Control Control Module. The Advanced Diesel Engine Module (ADEM III) fuel system is a proprietary electronic control module, which provides improved engine response and fuel efficiency,plus advanced diagnostics and reduced emissions. Altitude capability is increased to 3050 meters (10,000 feet) without derating. ADEM III allows full electronic integration of the engine and transmission for maximum power train efficiency. Power Train Advanced Caterpillar power train is reliable and fuel efficient. Electronic Power Shift electronic power shift transmission with automatic shift capability is a countershaft design built by Caterpillar. It is electronically controlled and allows full power shifts and directional changes. Fully modulated gear shifts contribute to operator fort and increase ponent life. Electronic Clutch Pressure Control (ECPC). Senses input from both the transmission and the operator controls in the cab to modulate each individual clutch through a proportional electrohydraulic valve. This results in smoother gear changes and improved shift quality. Energy is modulated into the clutches, resulting in longer clutch life. Integrated Braking System. New for G Series II, IBS integrates downshifting and transmission neutralization into the lefthand brake pedal. IBS provides smooth, optimized transmission neutralizer performance with a greater range of adjustability. The Integrated Braking System also lowers owning and operating costs by reducing axle oil temperatures, which can extend service brake life. Easy Service. Daily transmission oil level check is done from the ground through a wellprotected sight oil sampling valve allows quick,clean access to the transmission for S?O?SSM oil analysis. Cooling System New G Series II cooling package reduces radiator plugging and improves fuel efficiency. Reverse Flow. Air enters through the rear grill and exits out the top opening and side hood doors. Rear air flow picks up less debris from the ground, reducing plugging. Improved System Access. The 938G II adds a swingout grill, hydraulic oil cooler and air conditioner condenser for easier cleaning. Side panels open to allow access to both sides of all cores for cleaning. A heavy duty Airborne Debris Grill, with 4 mm perforations is available as an attachment. OnDemand Fan. Electronically controlled, variable speed ondemand fan adjusts to meet the varying cooling requirements of the machine. Fan speed is determined by oil, coolant and inlet manifold temperatures. In cooler operating conditions, average fan speed is reduced, resulting in less fuel consumption, lower noise levels and less radiator plugging. Unit Core Radiator. New unit core radiator with square wave shaped fin density (6 fins per inch) allows debris to pass through more easily. Environmental Features Caterpillar cares about the environment and continues to develop innovative solutions. Low Exhaust Emissions. The Cat 3126B ATAAC engine used in the 938G Series II is a low emission engine designed to meet Tier 2 emission regulations. It is electronically controlled, with airtoair aftercooling for more efficient bustion and cleaner emissions. Reduced Sound. The electronic ondemand fan automatically regulates fan speed depending on cooling requirements. The fan draws less horsepower in cooler ambient temperatures, which reduces fuel consumption. Sound levels are also reduced when the fan slows is additional insulation around the engine to reduce sound levels. Environmental Fluids. Extended Life Coolant/Antifreeze with antifoaming and anticorrosion properties provide extended service intervals (up to 6000 hours) and requires less frequent fluid changes and disposals. Air conditioning refrigerant is CFCfree. Operator Station 1 Steering. Low effort hand metering unit steering. Tilt steering column helps fit the wheel to the operator. Load sensing steering directs power through the steering system only when needed. When not steering, more engine power is available to generate rimpull, breakout and lift forces. 2 Excellent Visibility. The front window provides remarkable forward and peripheral viewing, including the machine wheels and bucket corners. Bonded glass in the windshield eliminates frame sloping hood provides excellent visibility to the rear of the machine. 3 Finger Tip Controls. New pilotassisted hydraulic implement controls deliver fortable, loweffort operation. Single lever joystick and lift lever FNR switch are available as attachments. 4 New Instrument Cluster. Gauges, status indicators and alert indicators are now centrally located. 3level warning system monitors key functions. The system alerts the operator of immediate or impending problems with engine oil pressure, parking brake, fuel pressure,electrical system, brake oil pressure,hydraulic oil temperature, transmission filter bypass, engine inlet manifold temperature, primary steering oil pressure and the air inlet heater. LED warning indicators with no bulbs to replace. 5 Cab Access. Left and right side doors swing open 180 degrees and latch for optimal ventilation, visibility and munication to ground level. Left and right side sliding windows are available as an attachment. Full service platforms are provided on both sides of the machine for safety and easy maintenance access. 6 Floor Mounted Pedals. All pedals including the new electronic governor,are floor mounted for greater operator fort. Left pedal incorporates the new Integrated Braking System that bines service brake, transmission neutralizer and downshift functions. 7 Generous Storage for lunchbox, coolers and cups. 8 Seat Options. The standard cloth and vinyl seat adjusts 6 ways.