2.
Sump Gasket
3.
Intake Pipe Gasket
4.
Intake Pipe Flange
5.
Plain Washer
6.
Lockwasher
7.
Bolt
8.
Sump
9.
Plug
10.
Gasket
11.
Carburetor
12.
Plug
13.
Screen
14.
Gasket
15.
Large Clamp
16.
Hose
17.
Small Clamp
18.
Plain Washer
19.
Nut
20.
Locknut
Figure 6-2. Oil Sump and Related Parts 0-360
OVERHAUL MANUAL LYCOMING 76 SERIES AIRCRAFT ENGINES Section7
Crankcase,Crankshaft
SECTION 7 and Reciprocating Parts
CRANKCASE,CRANKSHAFT AND
RECIPROCATING PARTS
7-1. At this time it is assumed that the magneto, cylinders and sump have been removed from the engine.
DISASSEMBLY
7-2. Remove the oil pump and vacuum pump body assembly by removing the four plain nuts, lockwashers and plain washers. Discard the "o" rings seal and oil seal in pump body. Remove the driven impeller from the crankcase and the driving impeller from the pump shaft. The oil pump shaft cannot be removed until the crankcase is parted. See figure 7-1.
7-3. Remove the oil pressure screen housing and the oil cooler adapter or the oil filter adapter assembly (where ap-plicable) from crankcase. Remove the oil cooler adapter from the oil filter adapter. Remove the oil filter and adapter plate. Also remove thermostatic oil by-pass valve. Discard all gaskets.
7-4. Remove the oil relief valve plug, gasket, spring and ball from the crankcase.
7-5. Remove the oil filler tube.
7-6. Remove the nuts and bolts from the parting surface of the crankcase, which hold the crankcase halves together. Remove the crankcase from the overhauls stand and place on the work bench.
7-7. Remove the starter ring gear support assembly (16,
2-
12
figure 7-3) from the crankshaft propeller flange by tapp-ing lightly on the rear of the assembly. The alternator
drive belt will be removed with this unit.
7-8. Remove the external retaining ring (12), seal retainer
(11) and "o" ring seal (10) from the tachometer drive adapter (figure 7-3). The tachometer drive adapter can not be removed until the crankcase is separated. 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(30)