Fuel Consumption Is Excessive
- 发动机操作
- 燃油供应
- 发动机转速/正时
- 单体喷油器
- 进气和排气系统
- 附属设备
使用 Caterpillar 电子技师 (ET) 检查 "Current Totals"(当前总体状况)是否怠速时间过长和/或负载系数高,这些都说明运转状况不良。
注: 同时,发动机运转情况还可能受到环境条件的影响,比如风雪等。
在发动机拖动过程中检查燃油压力。 检查燃油经过滤清器后的压力。 有关正确的压力值,请参考系统操作/测试和调整手册。 如果燃油压力低,请更换燃油滤清器。 如果更换后燃油压力仍然偏低,请检查以下各项: 燃油输油泵, 燃油输油泵的连接 和 燃油压力调节阀.
执行转速/正时传感器标定。 请参考标定步骤故障诊断与排除, "正时 - 标定"。
- 检查电子控制模块 (ECM) 接头 J1/P1 和 J2/P2 以及单体喷油器接头是否正确安装。 请参考故障诊断与排除, "电气接头 - 检查"。
- 在 Cat ET 上进行 "Injector Solenoid Test"(喷油器电磁阀测试),以确定 ECM 是否向所有喷油器电磁阀都通电。
- 在 Cat ET 上进行 "Cylinder Cutout Test"(断缸测试)以便将任何可能没在喷油的喷油器识别出来。 请参考故障诊断与排除, "喷油器电磁阀 - 测试"。
- 检查空气滤清器有无阻塞。 如果空气滤清器有阻塞迹象,则应清洁或更换空气滤清器。
- 检查进排气系统有无阻塞和漏气。 请参考系统操作/测试和调整。
检查所有附属设备有无可能引起发动机超负载的故障。 修理或更换所有损坏的部件。
Caterpillar Information System:
AP655D Asphalt Paver Propel System Location of Electrical Components (Propel System)
785D OEM Off-Highway Truck Engine Air Filter Service Indicator - Inspect
120M and 12M Motor Grader Machine Systems Bank Valve - Install - Rear Frame
785D OEM Off-Highway Truck Engine Air Filter Primary Element - Clean/Replace
PM-201 Cold Planer Machine Systems Service Support - Remove and Install
PM-201 Cold Planer Machine Systems Steering Linkage - Remove and Install
725, 730 and 730 EJECTOR Articulated Trucks Power Train Differential and Bevel Gear (Center) - Assemble
725, 730 and 730 EJECTOR Articulated Trucks Power Train Differential and Bevel Gear (Center) - Disassemble
725, 730 and 730 EJECTOR Articulated Trucks Power Train Differential and Bevel Gear (Front and Rear) - Assemble
725, 730 and 730 EJECTOR Articulated Trucks Power Train Differential and Bevel Gear (Front and Rear) - Disassemble
2007/11/26 An Orifice in the Brake Line Improves the Performance of the Parking Brake Switch {1408, 4257, 4267}
2007/11/12 Correction to Operation and Maintenance Manuals for the E Series Backhoe Loaders {7300, 7451}
Procedure for Troubleshooting and Cleaning the Oil Rail System for the Hydraulic Electronic Unit Injector (HEUI) {1100, 1126, 1250, 1251, 1261, 1290} Procedure for Troubleshooting and Cleaning the Oil Rail System for the Hydraulic Electronic Unit Injector (HEUI) {1100, 1126, 1250, 1251, 1261, 1290}
CB22, CB24, CB32 and CC24 Utility Compactors Hydraulic Tank Breather - Clean
785D OEM Off-Highway Truck Engine Air Precleaner - Clean
785D OEM Off-Highway Truck Engine Crankcase Breather - Clean
2008/02/18 New Tooling is Available to Assist During Disassembly and Assembly of the Ejector Bucket {6128}
New Abrasion Sleeve for the Cooler Hose of the Transmission{1375} New Abrasion Sleeve for the Cooler Hose of the Transmission{1375}
2007/12/24 An Improved Radiator Mount is Now Used on Paving Compactors {1351, 1353, 1374}
CB22, CB24, CB32 and CC24 Utility Compactors Battery or Battery Cable - Inspect/Replace
C4.4 Industrial Engine Belt Tensioner - Inspect
2007/11/05 An Update to the Testing and Adjusting Manual for Certain C-Series Skid Steer Loaders Has Been Made {5117}
2007/12/10 Updated Coolant Lines are Now Used in Medium Wheel Loaders {1377}
450E Backhoe Loader System Schematic