Tham khảo tài liệu 'operation, maintenance and repair of auxiliary generators episode 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | TM 5-685 NAVFAC MO-912 ENGINE NO. I9__ Figure 3-l7. Performance data plots. c C on the chart may indicate a developing engine problem. d D on the chart indicates engine governor positions relative to A B and C . b. Engine overhaul. An engine consists of structural parts and moving parts. Structural parts are those having no movement relative to each other. They do not involve clearances adjustments or lubrication. These parts consist of the following foundation bedplate foundation bolts frames cylinders and block cylinder heads covers and associated gaskets and auxiliary housings. Moving parts are those that normally require fitting and or clearance adjustment. These parts consist of the following crankshaft including journal surfaces counterweights gears and flywheels main bearings thrust bearings camshafts and bearings connecting rods and bearings pistons including rings and pins timing gear mechanisms and auxiliary or accessory drives. All of these parts are engineered and designed by the engine manufacturer to perform a particular task. When the need to overhaul an engine is indicated by operational malfunctions refer to the troubleshooting table consult the specific manufacturer s literature for instructions. c. Overhaul procedure. Engine overhaul requires disassembly of the engine. Verify that all engine parts comply with the manufacturer s specifications and tolerances. 1 Inspect structural parts as follows a Foundations for deformation and cracks. b Bedplate for cracks and distortion bearing supports for good condition. c Foundation bolts for tightness and general good condition including straightness. d Frames for cracks distortion and general good condition. e Cylinders and cylinder blocks for cracks water jacket areas for corrosion scale and rust machined surfaces for smoothness. f Cylinder heads for cracks water jacket areas for corrosion scale and rust valve seats for cracks machined surfaces for smoothness. g Covers and gaskets for distortion and .
