曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
installation for wet sump engines.
8-5. Engines equipped with an integral full flow oil filter, should be run-in with a slave filter and the regular filter in-stalled at the end of the run.
8-6. Any engine accessory drive which transmits oil pressure through oil passages in the engine and which is not pressurized by normal operation on the test stand must be checked for leakage at normal oil pressure by means of a special drive cover with oil transfer holes as re-quired. The oil passages involved shall be inspected for ex-ternal leaks at the completion of the test run.
8-7. It is desirable to have some method of maintaining the oil temperatures within the specified limits during the run-in. See Table 8-1. Engine should be idled until the oil temperature is approximately 140°F. (60°C.) before star-ting the run-in schedule. See Table 8-2.
8-8. Operate during the run-in with (MIL-L-6082 Grade 1100) lubricating oil or if the engine is to be stored operate with a mixture of 35' MIL-C-6529, type 1 and 65' MIL-L-6082.
8-9. Fuel should conform to specifications. See Table 8-1.
8-10. Engines equipped with a fuel pump shall be tested with a test stand fuel system terminating in a float chamber vented to the atmosphere. The fuel level in this chamber shall be below the entrance to the fuel pump by at least one foot. The fuel pressure to the chamber shall be maintained at 2 to 5 psi.
8-11. Engines not equipped with a fuel pump shall be tested with a remote fuel pump.
8-12. Attach the instrument connections and connect oil and fuel lines. Connect throttle and mixture control levers to the stand controls. Be sure the cables are free and not binding and that the travel is sufficiently long enough to completely open and close throttle and move the mixture control from full rich to idle cut-off. Install the applicable cooling shroud, test club (64802), adapter (64980) and bolts (64983). See Special Service Tool Catalog No. SSP2172. Be certain that the test club will turn up the rated RPM ± 50. See Table 8-1.
8-13. It is desirable to keep a log sheet and record the in-strument reading during each speed of the run-in
schedule.
8-14. Before starting be certain that the magneto switch is in the "off" position. Turn the engine over a few revolu-
tions to ascertain that no interference exists within the arc of the test club or within the engine itself. If it does not turn freely, do not try to force it or attempt to start until the cause has been determined and the fault cor-rected.
TABLE 8-1
ENGINE RUN-IN TEST LIMITS
Models Fuel Press. psi-at inlet to carb. or injector Fuel-Minimum Octane Rating Aviation Grade Maximum Oil Consumption Lbs/Hr. Qt./Hr. Oil Press. Operating-psiNormal Idle Oil Inlet Temp. F. Oil Outlet Temp °F. Max. Cyl. Head Temp. Bayonet Location °F. Full Throttle Engine Speed RPM
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(46)
