1.
Camshaft

2.
Dowel

3.
Camshaft Gear

4.
Lockplates

5.
Bolts

6.
Tachometer Shaft

7.
Breather Baffle

8.
Tachometer Adapter

9.
Seal

10.
"O" Seal Ring

11.
Seal Retainer

12.
Retainer Ring

13.
Pin

14.
Crankshaft

15.
Expansion Plug

16.
Starter Plug Gear Support

17.
Plug

18.
Retaining Ring

19.
Washer

20.
Roller

21.
Counterweight Bushing

22.
Counterweight

23.
Crankshaft Gear

24.
Lockplate

25.
Bolt

26.
Cover Plate

27.
"O" Ring Seat

28.
Thrust Washer

29.
Gov. Drive Gear

30.
Gov. Drive Shaft Gear

31.
Key

Figure 7-3. Camshaft, Gov. Drive and Crankshaft Assembly
Section 7 OVERHAUL MANUAL LYCOMING Crankcase.Crankshaft and Reciprocating Parts
Figure 7-4. Crankcase Interior Showing Moderate
Fretting at Stud Locations on Saddle Supports

7.17. Counterweights. See figure ‘i-3. Counterweights are disassembled from the crankshaft merely by removing the retaining rings (18), after which the washers (19), rollers (20) and counterweights (22) may be removed from the crankshaft ear.
NOTE

All counterweights and their related parts must be reassembled in the same location that they occupied on the crankshaft before disassembly. For example: The re- taining washers used with the counterweights are selec- tively fitted to the washer seats in the counterweights at the time of manufacture. It is advisable therefore. to mark all counterweight parts during disassembly to insure positive identification. These marks must be imperma- nent. No scoring, scratching, etching, or other permananent
marking of any kind is permissible on the counterweight parts.
7-18. To remove the crankshaft gear (23) flatten out the
lockplate (24) and remove the hex head screw or screws
(figure 7-3). Tap the crankshaft gear gently with a fibre
drift to remove gear from crankshaft. Do not remove the
dowel from rear of crankshaft ““less it has been obviously
damaged.
NOTE

On some of the earilier model of the 76 series engine, it was
not recommended to remove the crankshaft gear. These
can be identified by the presentence of 1 or2 dowels at the
mating surface between the crankshaft and gear. Some
models are equipped with the gear fasten to the
crankshaft by means of one bolt, lockplate and a locating
　
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