for schematic of the oil system for a typical 76 series engine.
2-13. Cooling System. These engines are designed to be cooled by air pressure built up on one side of the cylinder and discharged, with accompanying pressure drop, through the cylinder fins.
2-14. Induction System. The engine is equipped with a float type carburetor having a manual mixture control. Particularly good distribution of the fuel-air mixture to each cylinder is obtained through the center zone induc-tion system, which is integral with the oil sump and is submerged in oil, insuring a more uniform vaporization of fuel and aiding in cooling the oil in the sump. From the riser the fuel-air mixture is distributed to each cylinser by individual intake pipes.
2-15. Ignition System. Dual ignition is furnished for the engine by two electrically independent ignition circuits in a single magneto housing. A single four pole rotor pro-vides the magnetic energy for both circuits. Consult the latest edition of Service Instruction No. 1042 for a list of
Lycoming approved spark plugs.
RATIO 1.31:1 Figure OPTIONALTIONAL DUAL
DRIVE
GEARBOX TS ON VACUUM & OIL PUMPDR SHAFTMOUNTS 2-2. Gear Train Diagram -4 Cylinder Engine
2-2
OVERHAUL MANUAL LYCOMING 76 SERIES AIRCRAFT ENGINES Section 2 GeneralDescription
PROPELLER
AN FUEL AN FUEL PUMP BRG. No. MAIN PROP.GOV. SHAFTBRG. GOV.IDLER BRG. SPLASH OIL ON AC FUEL PUMP PLUNGER AND ECC. CAM
NO.I CRANKPIN NO. I CAM BRG.
NO. 2 CRANKPIN NO.2 CAM BRG.
NO. 3CRANKPIN
NO.4 CRANKPIN
NO.3 CAM BRG. EXH.VALVETRAIN
INT VALVE TRAIN PUSH TAPPETS
OIL PRESS GAGECONN OIL COOLER OIL
ROCKER VALVE SPLASH OIL HYDP VAC.PUMP PUMP OIL PUMP
OIL PRESS RELIEF VALVE
OIL SUMP
Figure 2-3. Oil Lubrication Schematic
OVERHAUL MANUAL LYCOMING 76 SERIES AIRCRAFT ENGINES Section3 GeneralOverhaul
SECTION 3
GENERAL OVERHAUL PROCEDURES
3-1. This manual will describe in separate sections the complete major overhaul procedures for each individual portion of the engine, thus dividing the manual for all practical purposes, into a series of individual handbooks dealing in turn with each component part. Since there are various overhaul practices and instructions of a non-specific nature, which apply equally to all basic engine components, these general instructions will be groupedtogether and described in this section, thus avoidingrepetition. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：莱康明发动机大修手册 OVERHAUL MANUAL LYCOMING 76 SERIES AIRCRAFT ENGINES(5)
