1
Lifting bail
16
Roll pin
2
Nut, elastic stop, 3/4-16 (2 req).
17
Gasket
3
Copper washer
18
Stud
4
Bolt, hex hd, 3/8-16 x 1 1/4 (22 req)
19
Nut, hex, 3/8-24 (3 req)
5
Lockwasher, 3/8 (22 req)
20
Bolt, hex hd, 5/16-18 x 1 1/2
6
Cap screw, 3/8-24 x 1 1/4 (3 req)
21
Copper washer
7
Lockwasher, 3/8 (3 req)
22
Front half cover
8
Lockwasher, 3/8 (2 req)
23
Side gasket
9
Nut, hex, 3/8-24 (2 req)
24
Front gasket
10
Plug nut
25
Nut, hex, 3/4-16 (2 req)
11
Gasket
26
Plain washer, 3/4 (2 req)
12
Shaft
27
Leaf spring
13
Body
28
Rear gasket
14
Bushing
29
Gasket
15
Gear
30
Rear half cover
Figure 97. -- Continued.
unloader pilot (par. 108a), and the slowdown assembly (par. 109a). Remove the two nuts (9) and lockwashers (8) that
hold the tachometer body (13) to the front half cover (22). Lift out the tachometer drive assembly, comprised of the plug
nut (10), gasket (11), shaft (12), body, bushings (14), gear (15), and roll pin (16). Do not disassemble the tachometer
drive assembly. Remove the gasket (17). Remove the two hex head bolts (20) and copper washers (21). Remove the 22
hex head bolts (4) and lockwashers (5) that fasten the front half cover and the rear half cover (30) to the crankcase.
Remove the three cap screws (6), lockwashers (7), and nuts (19) that hold the covers together. Remove the gasket (29).
Lift off both covers. Carefully remove the two side gaskets (23), front gasket (24) and rear gasket (28). The four studs
(18) need not be removed, if they are not bent and their threads intact. Unscrew the two hex nuts (25), and remove the
two plain washers (26), and the leaf spring (27) from the underside of the rear half cover. Lift off the lifting bail (1), with the
elastic stop nuts (2), and copper washers (3) from the rear half cover.
b. Inspection. Inspect all parts for damage. Replace cracked covers. Replace the complete tachometer drive
assembly if the tachometer drive gear shows any sign of wear. Replace all gaskets.
c. Installation. (fig. 97). Put the copper washers (3) over the threaded ends of the lifting bail (1) and under the
elastic stop nuts (2). Insert the lifting bail with the washers into the two holes in the rear half cover (80). Put the leaf
221
