TM 5-3820-239-15
1
11
Retaining ring
Washer, lock 5/8 in. (4)
2
12
Centralizer swing bolt hand grip
Centralizer am half bushing (2)
3
13
Washer, flat, 3/4 in. (2)
Alemite fitting (2)
4
14
Centralizer swing bolt spring
Cotter pin (2)
5
15
centralizer swing bolt pin
Nut, hex, slotted, 7/8-14 (2)
6
Centralizer swing bolt
16
Centralizer arm bolt, 7/8-14 x 7 3/8 in. (2)
7
17
Screw, cap, hex-hd, 3/8-16 x 3 1/2 in.
Centralizer arm botl bushing (2)
8
18
Nut, self-locking hex, 3/8-16
Centralizer arm (2)
19
9
Centralizer arm spring (6)
Centralizer bracket
10
Screw, cap, hex-hd, 5/8-18 x 1 1/2 (4)
Figure 6-5--Continued.
(26) Press rotary valve bushing (36) into
(31) Install upper bearing spring (25)
cylinder case (96) through the ex-
and upper bearing cap (24). Install
haust cover opening. Make sure that
thrust plate (23) and exhaust cover
the keyway in the bushing is alined
(22).
with cylinder liner key (35). Ream
(32) Install reverse valve hole stud (14)
the bushing if necessary.
and live air stud (15) into cylinder
(27) Install rotary valve (34) into cylinder
case (96). Install seal rings (10) in
case (96).
motor air manifold (9).
(28) Using a suitable bearing pusher to
bear on the inner race, press thrust
(33) Secure motor air manifold (9) to
bearing (32), with the stamped mark-
cylinder case (96).
ing THRUST HERE facing outward
(34) Secure the assembled worm housing
(away from the cylinder case), onto
(71) and gear case (29) to cylinder
bearing stud (33). Press the bearing
case (96).
stud into the cylinder case (96).
(29) Rotate the crank assembly (in the
(35) If the air feed motor is to be installed
cylinder case) until the 1/16-inch
immediately, do not install worm
milled cut in crank pinion (73) is
housing clamps (19) until the motor
closest to bearing stud (33). Aline
is mounted on the drill guide.
drive gear (31) on thrust bearing
(32) so that the gear tooth marked
(80) are replaced, it is recommended that
with an arrow engages, the milled cut
the air feed motor be operated at approxi-
mately half-speed for several hours, to run
in the crank pinion (fig. 6-8). Insert
in the parts.
a suitable piece of wire or a nail
through the hole in the drive gear,
e. Remote Control Manifold. Reassemble
and rotate the rotary valve (34, fig.
remote control manifold in reverse of numeri-
cal sequence as illustrated on figure 6-3.
in the rotary valve pinion (see fig.
f. Complete Drill Mounting. Reassemble
complete drill mounting in reverse of numeri-
seat the drive gear so that it meshes
cal sequence as illustrated on figure 6-2.
with crank pinion (73, fig. 6-4) and
the pinion of rotary valve (34).
6-14. Installation
(30) Install crank pinion bearing (72)
over drive gear (31) onto the shaft of
Install the complete drill mounting as de-
crank pinion (73).
scribed in paragraph 5-12b.
