【正文】 力總成
卡特彼勒動力系統(tǒng)先進可靠，省油電子動力換擋變速箱。電子式電能自動換擋變速箱移位能力是一個中間軸設計卡特彼勒建成的。它是電子控制，并允許全功率的變化和方向變化。充分調制換檔有助于提高操作員舒適性和元件的壽命。電子離合器壓力控制（ECPC）。同時從感官輸入傳輸和操作員在駕駛室控制，通過調節(jié)每個離合器電液比例閥。實現(xiàn)換檔順暢和改善換擋品質這樣的結果。充分調制換檔使離合器的壽命較長。綜合制動系統(tǒng)。 II新的G系列，IBS的集成放了慢工作節(jié)奏，進入左邊的剎車踏板傳輸失效。 IBS提供平穩(wěn)，優(yōu)化的傳輸，性能有更大范圍的適應性。綜合制動系統(tǒng)還能夠降低車軸油的溫度，可以延長制動器壽命和降低成本。便于維修。每日從地面通過保護視力計檢查油位傳輸是否完成。石油取樣閥允??許快速傳輸，和S?歐?SSM的油品分析。變移控制。新的傳輸功能，它允許操作者選擇三種不同的移動應用和操作偏好模式之一。許多應用降低燃料消費。在所有模式，全機功率負荷仍然可用。牽引力控制系統(tǒng)?？ㄌ乇死摘毤覡恳刂葡到y(tǒng)牽引援助（附件）已改善了G系列二。傳感器和連接器已升級為更長的使用壽命。當TCS系統(tǒng)在開的位置，即開通了牽引力控制系統(tǒng)和車輛半軸旋轉關節(jié)。當輪胎滑倒，該系統(tǒng)根據(jù)條件的不同，用更合適的牽引力和對面輪差動傳輸。 TCS是全自動的，四個車輪獨立工作，并結合不同的開放與一個限滑實現(xiàn)可操作性。三、冷卻系統(tǒng)
新的G系列II散熱器冷卻封裝減少堵塞，提高燃油效率。反向流動?？諝馔ㄟ^后部格柵和頂部開的車門邊罩退出。后方的氣流從地面采集保證更少的碎片，減少堵塞。改進的系統(tǒng)訪問。增加了對938G擺出燒熱，液壓油冷卻器，便于清洗，空調冷凝器。側板開放，允許進入所有核心雙方按需分配。電子控制，變速風扇調整，以滿足不同機器的散熱要求。風扇轉速是由油，冷卻液和進氣歧管的溫度決定。在涼爽的操作條件，風扇平均速度降低，從而減少燃料消耗，降低噪音，減少散熱器堵塞造成。該系統(tǒng)的核心散熱器。新的單位方波以鰭狀散熱器為核心。下鰭密度（每英寸6鰭）允許碎片更容易通過。四、鏟斗和迷人的工作裝置通常選擇各種配套工具，物料搬運或快速接頭鏟斗，與地面接觸精確來滿足您的應用程序。快速接頭鏟斗。通用配置鏟斗，安裝了水平針鎖快速耦合器。三種尺寸可供選擇的工廠兼容。專用鏟斗。多種類型，如煤炭鏟斗為特定行業(yè)應用。螺栓固定的前沿?？筛鼡Q，為實現(xiàn)卓越的強度和磨損壽命。通常用重型邊緣（提高50％以上的磨損壽命）或耐磨材料（ARM）的邊緣，可用角落保護器的完整系統(tǒng)。斗齒螺栓。兩螺栓連接牢固角落適配器，以防止脫落，兩螺栓上帶中心適配器，尖端選項與重型保留系統(tǒng)。螺栓固定的斗齒和邊緣分段。應用可逆段保護齒間基地優(yōu)勢，防止出現(xiàn)扇形邊。重型可逆分部（提高50％耐磨壽命）也有此功能。背面磨耗板。背面板提供了可更換磨損斗底的保護。通用鏟斗。發(fā)揮出色的應用功能，如挖掘，裝料。有經過驗證的和接受過卡特彼勒大獎賽的切削邊緣上的斗齒和螺栓。四個基本鏟斗尺寸可供選擇。物料搬運鏟斗。平層的專頁設計為自由流動的材料（裝料應用）。兩個基本鏟斗尺寸供選擇。用戶可以通過觀察切削刃的角來判斷。938 G series 2 wheel loader1，EngineThe 938G II provides more power, excellent fuel economy, and reduced maintenance.Turbocharged, ATAAC. Turbocharging packs dense air into the cylinders for more plete bustion and lower emissions. Airtoair aftercooling (ATAAC) provides a separate cooling system for intake manifold air. The ATAAC system reduces smoke and emissions by providing cooler inlet air for more efficient bustion.Constant Net Horsepower. The 938G II’s electronic engine is integrated with an ondemand cooling fan. The engine pensates for varying fan loads and provides constant net horsepower, regardless of operating conditions. A consistent level of “working” horsepower is provided and fuel consumption is reduced.Oil Change Intervals. The engine oil change interval is increased to 500 hours (with CH4 oil), reducing costs and downtime.Powerful Performance. The 3126BATAAC engine delivers net power of 119 kW (160 hp), and meets EPA Tier 2 emissions standards. Its advanced system keeps fuel at low pressure in the fuellines until it is injected into the cylinder. Fuel pressure is created hydraulically in response to a signal from the ADEM III? Electronic Control Module.Electronic 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 efficiency2，Power TrainAdvanced Caterpillar power train is reliable and fuel efficientElectronic Power Shift Transmission. The 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 gauge. An oil sampling valve allows quick, clean access to the transmission for S?O?SSM oil analysis.Variable Shift Control. New transmission feature which allows the operator to select one of three different shift patterns based on the application and operating preferences. VSC reduces fuel consumption in many applications. In all modes, full machine power remains available for loading.Traction Control System. The Caterpillar exclusive Traction Control System traction aid (attachment) has been improved for G Series II. Sensors and connectors have been upgraded for longer life. A new lighted cab switch indicates when the TCS system is “on.” The Traction Control System measures axle shaft rotation and vehicle articulation. When a tire slips in poor underfoot conditions the system applies the service brake and torque is transferred through the differential to the opposite side wheel with better traction. TCS is fully automatic, works on all four wheels independently and bines the maneuverability of an open differential with the power of a limited slip.3，Cooling SystemNew 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 coresfor cleaning. A heavy duty Airborne Debris Grill, with 4 mm perforations is available as an attachment.OnDemand Fan. Electronically controlled, variable speed ondemandfan adjusts to meet th